Simple Gradual ON / Fade OFF Circuit For 12V(Car LED's)
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- เผยแพร่เมื่อ 27 เม.ย. 2024
- Here is a simple circuit that will allow you to have Ultrabright LED's or small incandescent lamps gradually turn on, then fade off. It does not get more simple than this. Resistor and capacitor values can be adjusted up or down to accommodate your needs.
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Love your hand-drawn circuit. Definitely going to try this! Thank you.
Electro Dad You're welcome! Be sure to check out my other videos, rate thumbs up, and share.
Wow ur explanation with demonstration is just splendid! I love how u explain what's the role of each resistor and capacitor does! Though I don't know how the sizing of those components are calculated.
Thanks for this video. I used it to make a flashing light for a lighthouse lamp. The ramp up/down gives the effect of the old style rotating lights.
h1aa Glad you were able to use the circuit. Be sure to check out my video playlists, rate Thumbs Up, and share my channel with others.
Thank You
Very, VERY well done! Thank you for the detailed explanation. Great presentation!
Tim Peerson Thanks Tim! Be sure to check out my video playlists, share, and rate Thumbs Up,
The circuit you designed was very useful. I can wire more capacitors in parallel or a high capacitance capacitor for longer delay time 👍
Thank you! This helps me figure out the slow dim for a 555 timer circuit.
Glad it helped Doug! Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites. Thank you
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Just what I needed for some Solar powered ceiling lights. Awesome!
Great job! I'd love to see a 555 IC in the circuit so as to not on/off with manual switch.
Works beautifully, thank you!!! Going to wire up some eyes for a terminator t-800 skull.
I gard You're welcome! Be sure to check out my video playlists, rate Thumbs Up, and share my channel with others.
Thank You!
Great video! Do you have any recommendations for turning on an LED for 3 different time presets? Say for 1 second, 2 seconds, or 3 seconds then immediately turns off. I'd need some kind of 3 stage switch, but I'm not sure what to use to set the time intervals for allowing power to the LED from the battery.
Great video for 12vdc projects!
Glad you liked it
dope. i like the acid at the beginning too
Awesome, thank. I was looking for a way to slow down a 555. Using a capacitor at moment but wanted a more controllable way.
Glad I could help
Thank you for explanation great job 👏🏼
Glad it was helpful!
Very cool mate.
Interesting circuit😊
Thanks for sharing'
👍 THUMBS UP👍
Thanks. Glad you liked it. :-)
Thumbs up for sure. I'm needing a slow ramp up and down for a 12v 1.5w led. Hopefully I can figure it out.
Play with the values.
Good job- nice video!
Hi very nice demo and explanation, if you leave the power attached, would the circuit run by fading in and out , dim to bright and bright to dim
Great video with very good explanation...👍🏼
Glad you liked it! Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others. Thanks
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Hi, would this be suitable to delay both the on and off time of a relay. I have put together two of your other videos (Delay relay On & Delay relay Off) but incorporating them together doesn't seem to work for me. I may be missing a few things, but the thing I am trying to do is avoid erroneous switching on and off (chattering) of the relay by just using capacitors and that is where I'm at in my learning curve right now.
I was looking for a relatively inexpensive circuit for an 8 channel sequential Christmas tree light controller. This fits the bill perfectly. I am using a 555 to pulse a 4017 decade counter. The outputs will enable 1 of 8 channels of DC controlled dimmers I have. each output will feed a different color of lights on the tree. I did not want to go to the trouble of using an Arduino as I have not done any work with them and I do not write code. This along with my sequencer should work perfectly. Thank you!
Sounds like a good idea.
Remember to connect the 9th output of the decade counter to the 'reset' connection of the 4017, otherwise you'll have a short period of complete darkness every cycle.
Also, to save on using such massive capacitors, you can increase the value of the resistors acting as the voltage divider in this circuit.
ie, if both values are multipiplied by ten, the capacitor value can be decreased by ten times too, meaning only a 220uf cap could work.
Hi, i will use 20pcs 12v led motorcycle for this circuit,,, do i have to change some values of capacitor, resistor and transistor to make this work fine?
Thank you,
Hey what transistor should i use with this circuit
nice video very well explain my question is if you do not want the fade on part but the fade off what do I have to change
Lose the 1k - 1.2K after the diode. :-)
You sound like John Mulaney LOL LOVE IT
+Andrew Grady
:-). I just listened to him, similar sounding.
Very nice, man.
Glad you enjoyed the video Gabriel! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel with others. Thank you
Sooo good!
Thank you so much, what do i need to do if i want 12v bulb?
Glad you enjoyed the video! Just make sure the components used are rated for 12V. The bulb must not draw more current than mentioned in the video. Be sure to check out my other great videos and most importantly share.
Really good clip!!!, what changes to the schematic would I need to use 10 Diodes?
It depends on the type/power consuption of theses 10 diodes.
But a standard LED strip for example is no problem, no changes to setup one or two, depening on soft start/stop preference.
If you overdo it, the transistor might get a lttle hot (like with the light bulb in the video).
Passive cooling can help to increase the life span in that case and is also not a big deal.
Hello, can you make this negative switch? Normally car dome switch are connected on negative. Thanks!
Hello, great video, thanks so much, I'm going to use it for lighting stair tread led strips in my new house. I dont suppose you know how to scale it for similar effect for 12v led strips drawing about 2A ?
You'll need to experiment using different values. Thanks for watching!
@@electronicsNmore hi if o wnat fade with 1 minute to on led what can i do ? slow fade in 1 minute
Nice. I currently have 4 LED arrays on my boot lid ( yes it’s bright). Just worked by a PIR giving an output of 3.6 volts. I use this, via a N2222 transistor to work a 12v relay.
Me being lazy, do you know if can I use the 3.6v to control the power transistor or will I need to step up my 3.6v first? I rather fancy fade in/out LEDs worked by a PIR.
3.6V should be OK.
Exlent work bro 👌
Thank you so much 😀
Very good your circuit here is of the brazil
Thanks for watching!
is it ok to use 12v 3W led lights for this circuit and how to make the fade on faster and fade off slower?
I have a smallish terminator 2 wall plaque of a terminator face. Upon the press of a button, the Led eyes flash on and off quite quickly. Do you think an electrician could put a capacitor in the circuit? The back is hollow and there seems enough wire? I’d like the eyes to light up and fade off? Cheers, Brian.
very informative. i need something on a timer, too, to light different LEDs.
Hi Ryan. Be sure to check out all the other great circuits shown on my channel, and most importantly share with others. Thanks!
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Hi, and thnx for shearing that practical circuit, i have a little question,
How can I connect this circuit to a led strip?
Theoretically, the LED strip will behave like the two high power LEDs, but it does not need the shown pre-resistor because the pre-resistors are already integrated in the strip itself.
This is an excellent tutorial and much appreciated as it's precisely what I was searching for. I was hoping you could help me. I would like to use this circuit on a 100w chip led. Do I have to increase the wattage rating of all the components? And if so to what wattage?
Hi Adam. 100W is way too high for this circuit.
Thank you very much! Saved me a small explosion
Hello sir, this video is just what i was looking for for some time. I need to make this fade effect for aquarium lamp witch is more stronger (about 60-70W LED lights) and to easy adjust time fading. Can you pls help with that?
That current level is a little high for this circuit.
Nice presentation of DC RC circuit principles! Any 110v auto dim/brighten circuits for a 60watt incandescent or clf/led bulb bulb you know of that i can fit into a typical light bulb socket housing ? Every thing I've found uses blue tooth technology, is expensive and is overkill for my need
+James Adams
Hello James. I don't know of anything small enough that would fit inside a light bulb socket housing.
Thanks For Watching!
Great video! Can it use to slow start dc motors?
No, too much current, unless you use a very small dc motor.
Would this, in theory, extend the life of LEDs and help against premature burnout?
I've got some shoplights from Amazon (the 4ft T8s that are wicked bright).
I've seen a handful of people who also have them that are experiencing premature burnout (some of the LEDs flicker, are dim and/or some just stop working full stop.)
**Would limiting the power slightly and having them come on slowly (instead of hitting them with full power the moment the switch is flipped) help prolong their life and performance?**
Or do electrical work and wear to the same principals as hydrodynamics? (Example, you'd never crack open a main water valve due to the risk of hammer destroying the system or/and the spigots/systems down wind)
Another great video. If I may ask who is your favorite Led supplier ?. And other part's. Thank you very much for sharing all these great circuits. Take care and Happy Holiday"s.
Thanks Again.
Newark Electronics to me has the best prices, but I also buy stuff on Ebay, and directly from China as Well.
Happy Holiday's / Merry Christmas(OOPS, I forgot that is now an offensive word in the USA) :-)
electronicsNmore Thank you very much for the reply and the information.
You have a very Merry Christmas and a Great New year. It's not offensive to Me :-) I am old school, so to speak.
My warmest regards.
Bobby
@@electronicsNmore
Great clip. Exactly what I was looking for.
Nothing offensive about "Merry Christmas" anywhere and at anytime. We should Accept everyone's holidays, just as we accept their person. Saying "happy holidays" is just more inclusive, when you don't know the person you're speaking to.
The rumor that Christmas was under attack was just a scare tactic that was created to push the majority to hate minorities. Other religions in the US tend to like Christmas, if at least for the holiday mood.
I know this is unrelated to your clip, but it had to be said.
excelent circuit and explanation, how could you rise the output to handle a load of 4 or 5 amps ? i try to drive a horn that imitates a bull or a cow , but the current consumption is over 4 amps
Try a high current rated transistor. You'll need to experiment.
H, great vids!
Questions- I'm using a 63mini bulb which requires 7V - draws 630 mA. I'm going to use a 9V battery. If I change the 1st resistor value to drop the extra 2 volts, do I need to change any other component values?
Thanks!
Hi. For 630mA, you might get away using a 2n4401, if it gets hot try a TIP120. You'll need to experiment with different transistor values. Make what I show, then swap one at a time.
great vid could you tell me how many lumins the led produces at max power
Hello. I don't have that figure, but the LED is bright.
thanks would this cct work with a 10 watt led
Can this circuit be used with a constant positive and a switched negative?
I have a honda and would like to use this on the dome light (negative switched) it has LED replacement bulbs and am installing foot well lights. They foot well lights are 9-14volt 0.06-0.08amps I'm not sure what the dome lights are. Would this work on all 4 LEDs?
Can you do the opposite? Fades in when switched on, then gradually when switched off
Could this work with car horns just to have it fade out like the Mitsuba Alphas?
Awesome!!! How can I do this with a 5amp led strip?
Too much current
@@electronicsNmore Do you have any suggestions for higher current circuits?
Thanks! U can use, the same component's but the transistor, can replace with ”D718„. There's pins, are on the same place, but „D718's” Collector current is 8A and the Base current is 0.8A! Its 80Watts. Ofcorse, your scheme is more copability from mine. But with “D718„ u can install more powerful lamp. I thinking to try the mirrored scheme, with "B688„ PNP transistor or Darlington's pair. What do u think about that?
Hi!! I have done a circuit! thankyou very much for this video!
I noticed my LED doesn't light at its full brightness, which resistor is the cause? I suppose it's the one that connects directly to the LED? Thankyou! Greetings from Indonesia!
Egarolla Lower the resistor value in series with the LED.
sir I want the negative voltage at the base to turn on and off the transistor my vehicle uses negative voltage to control the switching on and off the light should I use a PNP transistor or should I make a NPN circuit for the dimming and soft start and have an PNP transistor turn on the NPN transistor or can we actually have an PNP transistor alone to make this thing work I am a beginner in electronics this would mean a lot to me, thanks.
Regards
Is it possible that turning on and off your LEDs and this fashion could make them last longer?
Now how do I attach this to a motion sensor and fit the components into an E27 ?
Hey..thank you for that impressive circuit. I did try it with the same components but unfortunately it doesn't fade off. The long fade in ( turn on) works, but not the long turn off. As soon as I turn off current, the LED turns off, like without circuit.
What could be the isssue ? Would be glad to get solution. Thanx
Something isn't right with your circuit.
Can i find a ready module like that?
Thanks very much for the circuit, I plan to use it to gradually light the deflector dish on my Enterprise refit model. Actually, I'll duplicate the circuit and use a three-way switch so I change from a gradual orange glow (impulse speed) to a gradual blue glow (warp speed) and back again. The one difficulty I'm having is that the LEDs are never as bright when connected through the collector as when they're simply connected to the 12V supply. In fact it doesn't seem to matter what limiting resistor I use. I can bypass the resistor completely and it's still the same brightness.
I'm using two bright white LEDs because I don't happen to have the bi-color (amber/blue) LED I plan to use, but I also get the same problem if I use an orange and a blue LED. They're nowhere near as bright as when connected to the 12V supply. I'd appreciate any suggestions. I'm using the values you specify (although I notice I get the same effect regardless of the value of the resistor going into the base). And I've used 220uF and 100uF capacitors.
Thanks, Jennifer
When the transistor is turned on, you should be getting full power to the LEDS. The only thing limiting the current would be the resistor in series with the LEDS. You can try reducing the value of the resistor on the base of the transistor, but don't go below 200 ohms.
electronicsNmore Thanks for the speedy reply. The way that I'm reading the circuit (and forgive me, for I am stupid), is that the transistor is just a switch in this instance, and once it's turned on, the LED should be getting the same voltage as if it were directly connected to the main supply. Although that does look suspiciously like a voltage divider (pcbheaven.com/circuitpages/LED_Fade_In_Fade_Out_Dimmer/ ). I did go down to 1K Ω on the resistor connected to the base, with no visible difference.
Anyway, thanks for the reply and I'll keep dinking with it.
Each LED should draw 20mA, or 30mA if you want to drive them higher and reduce the life of the LED. 2 LED's in parallel with a series resistor of 150 ohms will allow 60ma of current through the LED's leading to the collector of the transistor. If you place 2 white LED's in series, then add a series resistor leading to the collector of the transistor, then the value should be around 200ohms to drive them at 30mA using 12VDC. The greater the amount of current you need to flow from the collector to the emitter, the base of the transistor will also require more current
Got it to work. The white LEDs seem bright now. I found a 1K ohm resistor to the base worked fine. I'll have to hope that a bi-color LED proves brighter than the ancient orange LED I found.
Glad to hear that. :-)
I'm wondering how one would go about getting this fading effect but with a repeating on/off strobe setting much like a bicycle light or some flashlights have a "strobe" settings?
This circuit should work for you. Be sure to rate Thumbs Up and share.
Thank You!
Simple LED Flasher Circuit - Dog Collar
Will this work for 12v 1meter LED strip lights? Thank you very much!
1 meter of LED lights on a strip should draw around 1/3A. The circuit should work fine. The larger incandescent bulb in this video draws more than that.
Thanks For Watching! Be sure to share my channel with others and rate thumbs up.
electronicsNmore Thank you very much :)
So if I'm not wrong, the base/gate on a transistor is isolated from the collector/emitter path, so is there any reason the left side of your LED version diagram couldn't be running on a +5V source while the LED side is on a +12V source, as long as the grounds of both sources are connected together?
You can do that.
So I ended up building it as all 12V like your second circuit, since I have some LED strip segments that in parallel will draw about 560ma when connected direct to a 12V source. The only difference is that the NPN I have is a TIP31C vs the TIP41A. With 2x3300uf caps the ramp is still a little too fast for me, but with a pair of 4700uf caps it's perfect. The only trouble is that even when fully ramped up, I'm only getting about 160ma across the C/E path of the transistor when using the default 1K and 330 ohm resistors. If I lower the resistor values, it increases the current available to the LEDs, but it speeds the ramp time way up too. Any ideas how to get slow ramp and 500ma at the same time? The TIP31C is rated at 6 Amps so I thought it should be fine, but maybe that's the problem? Maybe adding a second transistor circuit in parallel or series? Any guidance you could provide would be much appreciated! Thanks.
What if you had varying levels of amperage? Like led strips you cut to size. If you had say a ~4amp circuit what would you need to upsize to make this work?
Don't exceed what I stated.
@@electronicsNmore so this isn't possible with a higher current light if you increased the size of the components in the circuit?
Hi :)
It's a nice video.
Do you know how to insert this using Arduino ?
Because I want to use this kind of method in my project. You see, I was thinking of using Arduino for my project and I want to make a sphere object which might consist of a speaker, IR detector which will producing lights and sound that gradually fades on when people touch it and fades off when people moved their hands away.
I'm not really good with this technical stuff yet so I hope you could share some of your ideas how does this work ?
Thank you !
Sir, can you write down, what type and number of transistor you used for this project?
Thx for your reply
Everything should be well explained in the video or video comment area. Thanks for watching!
Where can I purchase some of these "modules" that fade on over 2 seconds 12v 1-2amp led lights?
+Don Abernathy
Hi Don. Unfortunately I do not sell anything. I only show others useful circuits they can make.
Thanks!
Can I use this for a 24V 18W LED light ? Or what alteration should i making in this circuit ?
750mA is kinda high, but it may work. Make sure you use a TIP31A NPN transistor, and the electrolytic capacitor must have a voltage rating of 35 or 50v.
@@electronicsNmore what if the capacitor voltage rating is lower than 35v?
Hi, this circuit can work with a strip led? I don't know how that absorbs really, I think between 5 and 12w.
Yes, just as long as the LED strip light does not draw too much current. Thanks for watching!
Thank you. I would like to use it for an aquarium light. At the moment the light works at 12V AC but it turn on with DC power also. I think the light absorbs over 5W. What do you think about modifications to do to your circuit to work with my aquarium light?
Hi. Thx for shearing this circuit. I built it, works fine. I want to use this circuit for my car dome light. I need your advice for connecting this circuit to my car dome light. My car door switch connects negative (-) supply but this circuit has switch connects positive (+). Is there any chance to connect this circuit directly to two wires of the dome bulb. Please help.
Thank you
Prabuddha Koralagama The upper left side of the schematic that supplies power to the transistor, is where you take the +12VDC connected to the dome light and connect it to the circuit instead. You take one relay contact(The Common Terminal) and connect that to +12VDC power(Batt) that is always ON even with the key off. The other relay contact (NO) is connected to the dome light. Pretty simple.
Be sure to share, and rate Thumbs Up.
Thanks.
Thx for quick response. I tried but didn't work . door switch work with negative (-) supply there for when the door close it disconnects negative (-) supply . But according to the circuit it want disconnect positive (+) supply otherwise LED want fade off. If I'm wrong please correct me. I'm a newcomer for electronics. If you could send me the modified circuit diagram it will help me a lot. my email is prabuko@gmail.com. Thank you.
Unfortunately I do not offer special assistance to my viewers. I already gave you a lot more information than any other channel would give you. I simply do not have the time to assist everyone. This circuit is extremely easy. You will figure it out.
Thanks For watching.
Ok. I make it work, thanks
Hi, did you ever get this to work with the dome light?
hi! i would make the same with 2 led, in particular 3watt led. they are connected to 5v battery. what type of capacitor and transistor should i use?
You need to experiment using different values.
Okok Could you indicate approximately what kind of transistor and capacitor should I use?
can you help me make a circuit or can you tell me where to look so i can find out how to. i want to make a type two day time running like that fades back on
I think I remember you.....You asked for help doing something on your vehicle in the past. I went out of my way to help you(in a very detailed way), explained everything to make it easy for you, and I never heard back from you. Anyways, I don't fully understand what you're looking to do. I also have so many viewers asking questions on a daily basis, that I now only answer simple questions, I put way too much time into TH-cam, and unfortunately I don't get fairly compensated by ads placed on my videos. Use Google search and enter exactly what you're looking for, you should be able to find a circuit or something already sold. Thanks.
I'm having trouble buying an assortment pack of resistors on Amazon that have exactly 330k with 56k, 36k, and 470 resistors. Aside from the established range in the diagram (56k-63k) can I use resistors just barely outside of that range?
And will 1/4 watt resistors work for this project?
Doesn't have to be exact. :-)
Thank you!
Hi! I bought a panel with 12pcs SMD5050 LED for my car. I want to create yout electronic. Does it works with my more led?
Bence Zmák Hi Bence. Since you are only using (12) smd5050 LED's, use the schematic shown at 5:30 in the video. These LED's draw around 1.2A per meter. So you will be way under that current level using only (12) LED's.
Thanks For Watching! Be sure to check out my other videos, rate thumbs up, and share with others.
hi, I want to do this for my car headlights and make them nicely fade on and off like a Mercedes. How can I make that happen?
This circuit cannot handle that much current. Thanks for watching!
Do you find any solution?
And this is true analog, everything work at DC, no flickering. The best for aquarium.
Just imaging how shrimps will survive digital smooth on starters operating at 600-1000Hz.
They already have small shock when light abruptly starts up.
very niceee
Thank You Bruno. Be sure to share my channel with others, and check out my other videos as well.
Hey I want to use circuit 2 on the video. But i have a current from 2A. Can i use circuit 2? With a modification? Thanks!
+anthony kuypers
Hello. That level of current is too high for this circuit for it to operate properly.
+electronicsNmore thanks for your answer. is er a ohter circuit?
+electronicsNmore Why? According to some datasheet I just looked at TIP41A can do 6 A continuously?
Sean Smith thanks. But give this the 12v on the output?
Sir please replay... ☺💜
This circuit dome light for led i need to connect... correct transistor number???? I from kerala
How long can I keep LEDs on using just capacitors?
I'm planning to use your circuit in a DIY aquarium LED light, and the photo period will be controlled by a simple timer. This timer will turn all circuit on and off, so I can't use "Water Heater Timer Circuit ~ Auto Off" circuit.
Thanks for your circuit.
Depends on the value of the capacitor. if you use a supercapacitor you can get a VERY long run time.
electronicsNmore
When you say super capacitor, you say about 10.000uF? 20.00uF?
Thanks for your help.
Even higher. Up to FARADS.
Say I want a light to fade off only, and not fade on. How would this circuit be modified to accomplish this?
Add another diode(same direction) at the junction of the capacitor and 2 resistors which connects to the same switched on power as the diode on the left in the schematic. You should have instant on, and fade off.
Thanks For Watching! Be sure to share and rate Thumbs Up.
Is it possible to keep the bulbs on for something like 30 minutes to an hour? how big would does capacitors need to be?
You need to use the delay off circuit from my. video below. The schematic is located in the video description area of that video. Using a larger value capacitor and or resistor can give you the time you need. You can use this gradual ON/Fade Off circuit in conjunction with the other circuit.
Water Heater Timer Circuit ~ Auto Off
Thanks For watching.
Please share the links to my videos and TH-cam channel.
Is there any way to get this to work with a push to make switch rather than a latching switch?
Hello, I've probably made your schematic (the first one low amperage) at least 6 times and have swapped all the components out probably 3 times each. I've probably purchased at least 8 transistors thinking I burned them up. On the breadboard it works perfectly, but once I solder everything to a PC board, it fades on and fades out fine, but the LEDs stay lit at about 10%, never fully dimming. Any ideas? I thought maybe the diode is letting in reverse current or the transistor was letting current across it too, but i've replaced all of those components at least 4-5 times over. I'm hitting a brick wall, can you offer any pointers?
Hi Scott. Sounds like the power from the switch(the far left side of the schematic) isn't FULLY turning off. Make sure it is. When the power is off, it's not possible for the transistor to turn on.
If I hook up the ground cable and the collector, I receive the 10% lit LEDs. This is what is leading me to think that there's a current leak (or something). Also, this same layout on the breadboard, seems to work flawlessly. (makes me think I've missed something) After tracing these routes over and over, building it 5 or 6 times, still getting the same result. Mind boggling!!!
This circuit couldn't be any easier. You're doing something wrong, using the wrong part/parts or connecting the transistor wrong.
hey Scott i am having the same issue can you share me the complete soldered circuit that would be of great help.
I have 2.5 " red hunting led light that i want to make it fade on slow and off with a motion sensor. All in the same circuit. red led light current draw is 0.5 a (500 ma) operating volt ( 1 2 volts ) power consumption 6 watts and 300 lumen. can you show me a circuit with all that in it.
Donde puedo encontrar el circuito en español?
The car will also use 12V LED strip with will burn
what kind of transistor do I need to use
Can you provide material list
I want to burn it out as fast as in section 2.
sorry my english is not good
Thank you
Do as show in the video for higher current. Look online for similar higher current transistors if you need one.
electronicsNmore Do you know the model name of transistor I couldn’t find in the video
I was trying to do this exact same thing but for the LED headlights on my car. Is that even possible??? i just want them to slowly fade on, stay on, then slowly fade off when i turn my car off. Any ideas of what i would need if at all possible?
I want to do this as well. Do you find any solution?
What does the diode do in the first circuit? Can I remove that diode?
It won't work without the diode.
I’m having some issues. Not entirely sure what’s wrong. How can I send an image of what I’ve done for guidance?
Ah well. I can’t get the circuit to work in any configuration.
I want to make a design for my car where it pulses on bright then dims but stays on, then dim out when off. Like your led but dim after its on
You'll need to use a microcontroller.
This work on 220v power supply?thanks
No, DC only.
electronicsNmore THANKS!!!
Does this circuit work with 5V?
I have an old car that I want to keep authentic but I want the brightness of LEDS but hate the modern look of the instant on off on an old car
hi there, i have a question please, i will use a lot of leds, in fact i think i will run more than 2 amps. can i run the bigger circuit like you shown for the 500 Ma?
thanks
Calisto
The circuit is not designed to handle that much current.
electronicsNmore what can i do? any lead for doing this right? thanks
Bruno Calisto can i use a TIP41C?
2 Amps is a lot. I would do a Google search for "fade off circuit". Look for one that uses a mosfet.
It would not hurt to try the tip41c.
It takes too long before you see any light after switching on. Could you keep the capacitor partially charged all the time to avoid this delay?
Hello. You must be using a load which draws a lot of current, or you need to experiment with different value resistors and capacitor.
I meant in your example in the video. There is a delay before you start seeing any light at all.
Sean Smith The circuit is a GRADUAL on and fade off.
But there is a long delay before the transistor provides the minimum voltage needed by the LED to illuminate even slightly. It spends half the time off and then half the time gradually fading on.
Sean Smith
At 3:15 you could see how well it works. Clearly the LED will not immediately turn on starting at a very low dim state. The voltage needs to climb until the voltage is high enough to start turning on the LED.
Can someone assist me in a project? I wanna make a circuit that will power many led strips and have a fading in and off effect.. Any help appreciated.. Thanks
What can be put instead of 41a?
alltransistors.com/crsearch.php?mat=Si&struct=NPN&pc=65&ucb=100&uce=60&ueb=5&ic=6&tj=150&ft=3&hfe=20&caps=TO220
@@electronicsNmore thanks, but i used tip41C, not working :(
Hello if i want to use this circuit for over 500 mA what should i do ?
If it's not too much higher, it will still work fine. Thanks for watching!
Can you show me in A/C light??
How can I help you with this circuit?
so i built this circuit, and the LEDs light up as in your video, but when i remove voltage it just simply goes out. the only difference is that im using a 100uf 16 volt cap. any ideas where im getting th short on this?
nm i found my issue :)
Dan Morningstar Hey, umm, had the same problem as you but not sure what's wrong... Could you help please? =)
MaelstromAndCuriosity
Try adjusting the 56-68k resistor HIGHER.
electronicsNmore the issue was actually the positive lead setup... i was shorting there... split that up and we were off... on a side note, the prop i installed this in helped secire a grand prize win at a Maleficent screening in Hollywood at the El Cap! thanks for the awesome vid!
Dan Morningstar Thank you very much Elena Kalis and Dan Morningstar , we got it working in the end! =) It was the positive lead setup and for some reason, the transistor blew, but in the end, we got another and it works perfectly! Thanks for this BOSS video! =D
Can i use 4,5 or 5 or 6 or 9volts? If i can use, which components do i have to change? I want to use 3v led, not a lamp :)
Renan C. Any voltage works. Refer to the link below. Usual mA is 20-30. and the forward voltage of R,Y,G is around 2.0V. For white or blue 3.1V.
led.linear1.org/1led.wiz
Be sure to share my channel and rate Thumbs Up. Thanks.
So do you mean that a i cant use 4,5 or 5 or 6v in this circuit for fade the 3v led?
You can use lower voltages exactly as the schematic is shown. You may have to play with values to get "exactly" the type of fade on/fade off you are looking for.
ok, tank you very much :)