Auto On Off Light Switch
ฝัง
- เผยแพร่เมื่อ 28 ส.ค. 2024
- I found lots of NPN Silicon Phototransistors on eBay. For the MOSFET a IRF510 will work. Lots of them on eBay also.
Auto On Off Light Switch
RadioShack
NPN Infrared Phototransistor 276-0145
MOSFET N-channel 276-2072
![[TH] 2024 PMSL SEA W3D1 | Fall | สัปดาห์ตัดสิน ทีมไปไฟนอล](http://i.ytimg.com/vi/ZBU3GyzqErI/mqdefault.jpg)
Your videos are very well made. Clear, concise, articulate. Thank you!
Sir . Hearty thanks for your demonstration. In future your services will be blood of humanity. Thanking you and your staff.
+jagadish prasad Thanks
Great circuit at a learning speed most can learn at. I had a stroke in '09 & 7 Tia's since then so my thinker isn't the best anymore so it is great too find someone that I can learn from again. Thank you!!!!
Thanks therealmylesracing
Sir you have a great voice with nice clear diction, great for tutorials like this. Instructional and enjoyable.
I know this was an easy circuit for you to design but this video was perfect for me!! Thank you so much for making so many quality videos.
How anyone can downvote this great, calm, music-free beginner MOSFET tutorial is just plain bizarre.
Thanks
I really enjoy your videos and i keep on learning. A big thanks all the way from Sweden.
Thanks Eric Olsson
Excelent schematic.I used it to make a dusk to down sensor for my outside LED lights.Instead of phototransistor I used a small photovoltaic panel , from a USB mobile charger and it's working very well.Thanks!
Thank you, and your welcome.
@@AllAmericanFiveRadio Still working after years in use.
Thank you for the clear lecture and demo of this simple but vital circuit.
Thank you.
Thanx for always giving a clear explanation on your videos.
Thanks Giovanni Brazzoli
Hi Rick, AAFR, Another most excellent tutorial, thats clear, great visuals, and in an easy going manner that is most condusive to learning. I really enjoy your videos, and take notes on every one. I've learned so much I never thought possible, because of your great explanations of what is going on. Thankyou so much for sharing your knowledge, it is very much appreciated, and, well put to use. Take care, Peace & Happiness from Oregon. Cass.
Just what I was looking for, very simple in deed.
This has been my night light contoller for almost 4 years.
Great!
What causes 52 people not to like this excellent lesson?I can only this one one word - fools!R
Because two problems. 1 ) à filament lamp is a short circuit when it os cold and the currant on MOSFET can break it. 2) the potentiel of the gate have slow variation, and the MOSFET is not satured and it have a lot of heat to dissipate
Sorry for m'y english.
The Monotone voice of the narrator. I guess.
He does take pauses where none are needed. This is very annoying. (I din't vote by the way)
Love this kind of info, I may learn electronics one day.
Thankyou, this was revealing. Please will you make a video on building an "On at DAWN off at night" photoswitch, for a 12 volt dc 5 - 10 amp light/fan circuit.
It would help me out quite a bit on this solar powered greenhouse project I'm stuck with.
swap the positions of the photo-transistor and resistor
Thank you, and your welcome.
Great circuit and lesson! Thank you!
Thanks Tony T.
Ppp
very useful circuit, thank you very much for the presentation.
great primer on this application , thanx
Thanks
Pretty cool, Rick. Thanks!
Thanks Ron Pearson
Thank you very much. Very well explained.
good video! thanks for sharing. cheers.
Thanks shad0wburn3d
Great tutorial, thank you and have a nice day :)
Thanks
Very nice video and very usefull project. You did a great job "teaching" how it works. Thank you for doing that. 73 Leo k1zek
Thank you, and your welcome.
Thanks a lot for this! How about modifying this to be triggered on when there is a person nearby with a timer to go off when there is no trigger.
Thanks cyberlightbeing
Very good video.
Love it!
great demonstration i cant wait to try this!
Ò
These are also available from Radioshack and at least one of these is less expensive from Radioshack.
eBay is less expensive.
@@AllAmericanFiveRadio I decided to check that out. RadioShack was S2.50. Ebay had prices ranging from $3.95 to $.99 . The more expensive ones showed up first and I didn't see the cheaper ones first time I looked. Just for fun I checked Mouser and found it there for $.88 . The Ebay seller had free shipping so it may actually be cheaper in the end. A reminder for me to check more closely when looking for parts. Thanks for replying.
Should I wish to adjust the sensitivity of the darkness, all I would do is add a pot between the Photo-transistor and ground. Would that be enough to provide an adequate variability if the correct resistance was used?
very nice explanation,
i'll try it,
thanks for sharing.
Thanks Nice Observed video channel
Thanks
I would like to make a driving course switching light tower to direct the approaching car to steer into a left lane or right lane. So I would need to use a 12v car battery, feeding 12v motion sensor (a PIR of 50 ft detection distance with an adjustable delay system built in), feeding an alternating switch, feeding two LED lights visible to the approaching driver. The battery would be linked to a solar panel keeping the 12v car battery charged.
Please let me know if this would work. I would approach my local college professor to assist me with the design as well.
Thanks
Joe B
Well done video, thanks!
Thanks Bob Medeiros
I am looking at doing something like this in the future when building an inverter.
When I was at tech,we were discussing how optocouplers are used to isolate high voltage circuits from the Low voltage part,in my case,I want to convert 240 volts DC (270 volts DC to charge 10 x 24 volt DC batteries) into 240 volts AC (sine wave).
The Low voltage side (50 Hz oscillator) needs to be isolated from the high voltage side.
I'm looking to do away with a transformer to reduce power losses in the circuit.
Great video! Thanks.
Hi . was very good
Is there a way to tell the difference between a regular LED and a infrared LED, by looking at them??
Kennynva T. No, but just put a small 1.5v battery on it for a test. Use any camera to see the infrared light. If you see nothing through the camera then the led or battery is dead, or you have it connected the wrong way.
Thanks for your help sir
Your welcome.
Lots of Respect AllAmericanFiveRadio thank you very much for your brilliant circuit
I personally made this circuit which I copied from you with a couple of changes
I've added a 12 volt Fan as well as a CPU heat sink. This addition keep the Mosfet
quite cool. I use this when Current Goes away here in Jamaica.Thanks Again AAFR keep up the Great Work. Please Subscribe.
Thank You.
Interesting simple circuit. Would making the 100K resistor variable allow for sensitivity adjustment? Or would a second resistor between the diode and ground do the same thing?
replace the 100K resistor with a ......say 47 K resistor and a trimmer aka trim-pot........say 100K
Hi, thanks for sharing. i made a similar circuit but finally result is not good at all, the question is simple, How many volts and amperes receive the bulb light at "night". 12V or less. Thanks again, your explication method is excelent.
depends on wattage of your PSU and RDS(ON) and VGS of mosfet ,,,,,, RDS sets the effective voltage drop VGS sets how much current it can pass
Thank you, and your welcome.
I have a question. The gate of the mosfet is in parallel with the phototransistor. Ordinarily in a parallel circuit (like the plugs in your house) the current draw from one wont affect the current draw from the other (eg a light bulb and a hair drier on the same circuit). Is it because the phototransistor is drawing more current than the batteries internal resistance allows? That seems unlikely.
Ohm's Law
12VDC/100000=0.12ma
PLEASE TELL ME WHAT MOSFET AND RESISTOR MUST BE USED FOR A 5V 2V TO LIGHT 4 LED 3V 3W EVERY .. THANK YOU
+ELI INSP MOSFET-IRF44NZ
Thank You. Helped me.
Awesome! Many thanks!
cristal clear explanation. Thanks.
Hello. I have just made this circuit using your diagram and it works great! thank you. The only tweak I would like to do is have the light come on when it is darker, it just comes on a bit too soon. Could I modify it? Thanks again. John.... :)
@@kennmossman8701 Thank you very much 😊
@@johnberry5339 You are welcome! The fixed resistor (with the trimmer) is more to limit the current thru the photo-transistor. As low as 1K ought to be okay. It seems the max current is Collector Current:...................................................25 mA
Yes you can, Thanks.
nice work sir
+Harry Bola Thanks
you are weiicome
@allamericanfiveradio- does the voltage at the mosfet output vary with light change or is it all on or all off? Thank you
This one varies.
Nice tutorial. I need a 12vdc brushless fan to run out of a small project solar cell when the sun is up and that turns off when sun is down. Can I modify this circuit to work in such way? Any suggestions will be greatly appreciated.
I'll look into this and get back to you
why do you need a switch. When the sun is not strong the solar cell will not supply much energy, and fa turns off. You can use this circuit with very little modification. just adjust the sensitivity, maybe a potentiomer.
thank you sir for your video
nice and educational video, i got question, is there any number of that n photo transistor? can i substitute that N phototransistor to LDR or light dependent resistor ?
Part numbers are in the Show More
Good lesson
Great tutorial, Thank you... john... :)
TQ for info
Thanks
while the phototransistor is ON, all the current flows trough it (C-->E)? Ain't some small current goes to GATE?
some VOLTAGE but too small to turn on the MosFet
Thank you all.
When the phototransistor is in daylight and at 180 Ω. Why does some current not go to the gate as well as earth?
These is a very small voltage on the GATE and it is not enough to turn the MOSFET on.
nice multimetr
Thank you, and your welcome.
very simple , THank . but i want to know if we can use any type of mosfet or if is only witch The MOSFET IRF510. that it can work?
Just about any will work.
could this circuit be reversed simply by turning the diode around? so that when it sees light it turns on and when it is dark it turns off?
also is there a way to adjust this for sensitivity? like if i had a red led on a gauge that lights up as a warning indicator and i wanted to be able to use this diode setup to trigger an external led and warning buzzer whenever that gauges red led lights up (without internally modifying the gauge which would violate it's warranty)
it would be installed in a car so it would have to deal with daylight conditions, but maybe a red tint film that only lets red light through and an adjustable pot somehow to deal with the ambient light in a car but still immediately activate when the red led lights up? sorry i'm a noob with circuits and just had this idea to be able to add a warning buzzer to a gauge that only has a warning light.
In this video I am using a N channel MOSFET, if you would change that to a P channel MOSFET that should reverse its operation. I would have to try this to make sure, but this would be the first thing I would try.
Could I put a thermistor in place of the phototransistor and a pot to control a cooling fan?
I think that could work. I would need to experiment with the circuit. This would be using a 12VDC Fan.
Can you point me to the equation(s) or documentation that could be used to determine what type of resistor would be necessary to replace the 100K for a smaller or larger input voltage? Thank you!
Ohm's Law, The Basics
th-cam.com/video/d34-VKc2cyY/w-d-xo.html
Thanks! I found the Vgs of the mosfet and was able to piece it together from there!
Thanks again
Could I use a relay to turn 120V0lts for a 120V circuit [lights n camera?]
why use a relay, when you can run this circuit with a triac, whose gate is connected between the ground and the source of the mosfet?
Yes you can, and it will provide 100% isolation between both circuits, this is much safer.
AllAmericanFiveRadio ok, but still isolation is not that big a deal if it is going to be located inside a plastic container.
Any idea how I'd wire a mosfet to switch off when I turn on my car headlights, for proper operation of daylight running lights (they need to be off when headlights are on)
An n/c relay would work, but wouldn't be as interesting!
+bridgendesar sure thing, however, you will find it a lot more fun to figure it out all by yourself! I just did a DRL driver myself. Includes an npn and a pnp bjt to control its on-off state, a step-up converter, because 12v was not enough to drive my 5 leds, and an lm317-based current limiting part. It was a lot of fun, and it was my first ever electronic project! It was a lot more fun to figure out what is needed, than just get a solution from someone else! I learned a lot about electronics on the way....
Thanks a lot for that
For proper operation be careful that light from the lamp doesn't land on the phototransistor.
I want the lamp to be on when it is exposed to light, what should I do?
Auto On Off Light Switch Reverse Operation
th-cam.com/video/8fE4eWeo7NQ/w-d-xo.html
good job
I have a IRFZ44N Mosfet, could I use this? I am only powering a 12v led srip with 12 led's on it. Thanks John.... :)
Should work, as long as your LED's draw less than 50watts@12VDC
Ok thank you, also I don't have a phototransistor but I do have a LDR that came with my arduino kit. could I use that instead or would that be a different circuit altogether? Thanks again John.... :)
It might work.
Thank you very much for your help, have a great day. John.... :)
verey nice😉👍
Thanks
Hi,
Can I use this exact setup to turn on my car headlights at dark? Thanks
+RichyA Antonini
No, this setup is for low current LED's
which scr work on AC devices..plz tell me
+Ayan Magamind a TRIAC
Fantastic, thanks!
Im trying to use my arduino UNO to send a +5V signal to a mosfet to drive a 24V solenoid. i know that i need a diode across the solenoid to protect it. What i don't know is how to pick the right mosfet. I know that i needs to be logic compatible. My power supply is 24VAC 750mA. the in rush current of the solenoid is 0.35A @ 24 VAC. The holding current is 0.23A @ 24VAC.
+Haitham Adwan
I just found your comment today. Google is doing such a great job. You're going to have to supply a higher voltage to the gate to get the current through the MOSFET that you will need to drive a solenoid.
+AllAmericanFiveRadio I learned that MOSFETs are not used to switch ac, that's why I am now using a triac nte56050 as well as an optocoupler moc3041. will these components operate within limits?
+Haitham Adwan
The only thing I have on Triac's is this video on a light dimmer. They used Triac.
Duty Cycle, Light Dimmer Demo
th-cam.com/video/GLMsAJMz-iw/w-d-xo.html
thanks very much
Thank you, and your welcome.
good
Thanks.
Do you not have the meter lead polarities reversed when connecting them to the phototransistor?
+mkay3751 The circuit works
+mkay3751 I know the circuit work. I meant when measuring the phototransistor resistance with the multimeter. You get resistance when light hits it, but when you cover it up the meter go in the less to No resistance range.
+mkay3751 Never used an analog meter? No resistance (zero ohms) is on the right end of the scale, left end is open circuit, aka infinite resistance.
+mkay3751 When measuring resistance polarity does not matter (unless some part of your circuit handles polarity of the test voltage differently, like a diode or transistor (which is like a pair of diode)).
can you make any schamatic like this..in ac qarent...using mosfet
+Ayan Magamind
DC only
so good✌
Thanks
whats the series number of Photo transistor you have used here..?
Radio Shack numbers are in the SHOW MORE
Tell me please, Which type of MOSFET use.
RadioShack
NPN Infrared Phototransistor 276-0145
MOSFET N-channel 276-2072
Hi sir. Can you make and show me how to diy 3v photo switch? Thank you in advance
+Jayrene Cruto I think this will work on 3VDC
thanks
+Jayrene Cruto make sure you use a logic level mosfet.
"normal" mostfets require 12 potential to work. logic level ones operate at 3.3v and 5v
I like to know the name of the bread board and where can i buy of from thx
It is a Heath Kit Zenith Laboratory Breadboard ET 3300
You might find one on eBay. But remember that this was a Kit and who knows the skill of the builder.
ldr..scr/mosfet/daiyak..auto night light ckt have you? any schamatic
+Ayan Magamind
search my channel for SCR
+Ayan Magamind
My channel search is located next to the 'About' on the right. Magnifying Glass
CAn this be use on low beam lights in a car?
It could
On the schematic where is the negative from the battery?
It's the ground symbol at the bottom of MOSFET, the 'S' lead, and the bottom of the Phototransistor, the 'E' lead. These two ground symbols are two wire connected together and they both are connected to the negative side of the battery.
AllAmericanFiveRadio Thank you for responding. Does that mean that if I ever see a circuit diagram without a negative connection I should assume the earth is the negative?
In this diagram the two ground symbols mean the other side of the battery which is the negative side. Using the same diagram but changing out the N channel MOSFET to a P channel MOSFET and reversing the leads on the Phototransistor the polarity is now exactly opposite. At the top the positive sign would be changed to a negative sign and now the two ground symbols still means the other side of the battery, the positive side.
Hello, could I use the 3.3v from my hc-sr501 sensor to open the mosfet please? Thank you vey much John :)
+Shahzaib Arshad Ok thank you very much :)
+Shahzaib Arshad Well, maybe a logic level mosfet but regular mosfet have opening threshold 2-4v but typicaly opens fully for voltage over 10v
Mine is a IRFZ44N :)
Can you write a circuit for us to see? or explain a little
Auto On Off Light Switch Reverse Operation
th-cam.com/video/8fE4eWeo7NQ/w-d-xo.html
@@AllAmericanFiveRadio Thank you very much, this is very helpful.
can we do the same with high power bulb...say 100w
+Bishank Agrawal
Yes. You might need to add a heat-sink to the MOSFET. And check the specification of the MOSFET, pick one that will handle the current.
How to connectmore led in some series
Use a relay.
Photoresistor vs Phototransistor
what is more sensitive ?
Kavindu Gilshan
Phototransistor, the transistor part
amplifies.
AllAmericanFiveRadio thanks :)
sir how can I use it for 220 volts lights
I would use a 12VDC relay to switch 220 volts.
AllAmericanFiveRadio you can use a Triac 400V in the place of the 12v lamp the Triac work likd the mosfet
make a video.. how to dim christmas light like heart beat.. but beat very very very sloww.. please tell me how to do that.. thankss
just 1 life, use a signal generator.
will this work with 3.7 volts 1 lithium ion
Maybe was just an LED.
Can I insted photocell with solarpanel? Please
th-cam.com/video/5IwS9z95Db4/w-d-xo.html
good vedio
Thank you.
How to change photocell with Solarpanel?
I believe you would need two solar cells in series to produce about 10VDC of output. The negative side the series would go to ground, the positive through a 100K resistor to the gate of the N channel MOSFET. When light strikes the two solar cells in series this would turn on the MOSFET turning on the light.
can I send picture of circuit that I modify to you,I can speak English a little ,in your circuit I want repalce solarpanel 12v instead phototransistor for close lamp in day and on lamp in night,Please send picture circuit to my email bookandplace@gmail.com
this circuit have 12 v from battery for on lamp and use solarpanel to sensor light instead photocell please teach me to build my circuit
to on lamp in day and close lamp in night.please
I'll work on the circuit and maybe make a video.
Thankyou I am hearing you
I'm waiting to hear you.
please send me the link of your channel sir!!
+Ayan Magamind
th-cam.com/channels/rKt6CZ5ZTBgbYcCiLGS2Lw.html
Part numbers are useless. What if you live in a country that doesnt have radio shacks?. The MOSFET is an IRF510.
+Robert Tomkinson
I order lots of parts from eBay. Most of the time it's free shipping.
+AllAmericanFiveRadio Cool. I'll type 276-0145 into the ebay search engine and buy a phototransistor. With free shipping.
Robert: I actually typed that exact thing in ebay and found two results both with free shipping. Complete moron. Sometime you can't be given everything in life, spend 4 additional seconds doing your own research.
Robert Tomkinson
Radio Shack parts numbers are rapidly becoming even more useless as Radio Shack does the final dip.
Good
+SULAYMAN KASIM Thanks