How to make a simple delay circuit
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- เผยแพร่เมื่อ 14 พ.ค. 2024
- How to make a simple delay circuit
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I would like to see a playlist created of "Classic Circuits You Should Know".
Look at the playlists my friend.
th-cam.com/play/PLGhvWnPsCr5_n-9fFQM6Sa9BZir0wvm59.html
learnelectronics Great, know one is private and cannot be viewed by ordinary folks :)
@@learnelectronics perfecto, muchas gracias
@@learnelectronics Great Idea Paul to have this series especially for us guys/gals just starting out
Try this th-cam.com/play/PL3X-iFMsLRglyTHjaV8ocz--Wtw9dnfLD.html
I do not mind your "rambling" while doing these videos, I have learned so much about how things work from your videos, thank you.
I'm just starting out in electronics. Self-teaching from books, internet, experimentation, and kick ass videos like your entire simple circuit series. Just wanted to say thank you and compliment on how thorough and helpful they are
I love these basic and practical (transistor) circuits. They are great for learning and playing. Thank you very much for sharing your passion.
Hi Paul, I really like these kind of videos, sometimes you show the same circuit as I learned in school, but sometimes your circuit is completely different. It's fun to learn new things. Ty Paul 😉
I really enjoy this series.
I love these series! Thanks for doing it.
Thats why I like your videos, they are clearly explained.
The playlist is awsome.
Thank you for sharing.
👍👍👍
You know you're learning when you understand what's happening before you can explain it! This is because I've watched a bunch of your basic circuit videos....great job!
Thanks. I just discovered this. I'm looking to pulse a latching relay. I'm going over your circuits. I'm learning a lot by building the circuits and testing. Very simple parts. Great explanation.
Thank you. Good simple circuit.
Used a delay-relay circuit to increase gas flow for Toepler pump operation for high vacuum preparatory line. Worked very well.
That was a very cool circuit and I think of lots of things I would use IT in!! So thanks for the knowledge Paul✊ really loved that one❤❤ keep um coming... more circuits like that one. Ones you found handy when you were learning. P.s. "circuits you should know" are my favourite videos you do. And i bet im not the only one too. So never stop making videos coz we all look foward to your next posts. 😳🙏👍
I have watched a thousand, maybe more, of videos from this theme and did not understand how it works.
With this video, i fully undestood! A simple video and made all the difference, for me, to undestand.
THank u.
I really appreciate this series. Building-block circuits explained and demonstrated for the average tinkerer is something I haven't seen before. There are many videos about components, many videos about full applications, but not much at this in-between level.
I’ve used the single stage delay many times, it’s a great little circuit. I would very much like to see the second stage of that delay circuit. Great video Paul.
Yes I would too. And if there's more stages and other little tricks ya can do with it id love to know about them to coz that was the coolest circuit I've seen in a good while.
Priceless video loved it. The rambling is superb!!!
Keep up the series. Great refresher for all of us.
You gotta love this, brings back good memories. A 2 stage would really add to this.
Love these vids. Put me down as wanting to see a 2 stage delay vid. Thanx!
Hey, I know this circuit and even used it before. Thanks for reminding me,😁 I have use for it again. Thanks for the video!
Sir! You just saved my IoT Capstone project!! I was looking for the simplest delay circuit(without 555 timer) to capture if a button is pressed when my Microcontroller board is reset. With this simple circuit I will now be able to persist the button press event and read it after my Microcontroller board boots up. Thanks a lot for making this video. God Bless you! :)
Brilliant teachers, make complicated things, look all so simple and easy to understand. I see those lovely hands, my mind experience this video, as if i was doing it myself. The best learning experience.
Cant help but like this awesome teacher.
Good job Man. keep the videos coming, love what you be doing. ;)
Love these simple circuits my man! Thank you for the informative content & God bless!👏👏🙌
Thanks, just what I was looking for as trying to add realism to models .
Just wanted to give you some feedback on this delay circuit. I’ve replayed it a few times, and each time I get just a little more out of it. You really opened the gate to my next project, I might come back to say it again!
It is so simple never thinked about cap connect to base. Thanks!
Awesome thank you for taking the time to teach us.
Regards
Alan
Great wee series Paul.
You should make a book with all basic circuits like this. The reason is because currently im in school and we don't get to teach this simple circuits and i find it pretty nessecary.I bet the next generation will forget half of this circuits, lucky your videos still exist to teach us about it. Still I would love to have a book with 500+ basic circuits
My favorite electronics series!
This basic circuit are the foundation to any hobbyst that what to seriously learn how to make useful creations. Simplicity it fundamental skill to learn to do amazing stuff. Thanks for sharing all this knowledge with all of use. Keep this hard work.... is good !!!!!!!
thanks for a VERY useful video on this circuit. I am going to use this as a delayed off relay in my car.
You're like someone who can teach me electronics and can have a beer with!! Honestly, love this video and I subscribed and gave a thumbs up. Now I'm going binge on all your other videos.
Thanks
Awesome circuit, dude! Thanks a lot! 😊
like it. These are circuits a enjoy watching. Keep them coming
I found this handy little circuit in a little flashing circuit that was meant for attaching to your shoe so it flashes when you walk. The switch was a simple vibration switch that triggered with eash footstep.
Love the electronics lesson and the humanity comments. Excellent!
I think it would be great if you did a video, as you suggested, on a two stage delay. Mainly because you mentioned that it uses a PNP transistor which has always confounded me. Thanks for what you do!!
Thank you for making this incredible content. I am doing my best to expose my 10 year old daughter to these basics I was taught at her age.
That was cool.
Thanks Paul.
I too do enjoy these simple videos. Thank you for the video. I would also like to se the dual stage and I would also like to see how to alter the function to a instant turn off instead of fading out.
Replace the switch with a resistor.
Put 100 Ohms in series with the switch and place that across the capacitor.
@@kensmith5694 Hi need to get the LED to stop more crisply too, at present it slowly fades away to a stop. Are you suggesting that a 100ohm resistor and switch placed together in parallel to the capacitor. The circuit does just what I need apart from this slow fade to off. Dont know whether anyone reads these as it is few months old now but thanks if you do.
@@johnhirst4673
Do you want a delayed turn on and a sudden turn off?
There are options for the off action:
1) Use a switch to discharge the capacitor
2) Open the positive power connection.
3) Open the negative power connection.
If you explain clearly what you want a circuit to do, you are usually 75% of the way to a good design.
A "slow on, fast off" usually works something like this:
To turn on a resistor charges up a capacitor and slowly biases a transistor on.
To turn off, the switch either forces the capacitor to discharge quickly or opens the power connection to the whole thing.
You are amazing Prof. !
Thank you, Master Wizard.
Great video. Thanks a lot I appreciate it 👍
Hi @learnelectronics,
Thank you for the great videos.
Question: Is it possible to control the fade on and off time of the led by adding two potentiometers?
One between voltage source and resistor/led, the other between ground and...?
Really helpful for a newbie learner.....very clear thanks. How would changing the resistance between the capacitor and base effect things please? Thanks Jim uk
Thank you Paul!
Really liked this !
Probably my favorite simple circuit :)
Its like the timing ligths on the entry to apartments. Nice and simple if you want some on timming light string of LED's
Nifty circuit and at first i thought 555-timer for something like this but i like this simpler variant. Cool series showing off useful circuits. Still hoping you can do a follow up on battery voltage monitoring.
Well explained
Good work
Cool. I'm going to build this right now
I came here to learn, and learn stuff i did!! Subscribed now. (not quite what I needed to learn, but close... I wanted to work out how to make a sequential switcher. So when i press a momentary switch it activates a few milliseconds later a transistor switch briefly. I think i can work something out from what i learnt here. .I want a very quick, 1 second or under transistor being in closed mode.... that I don't know how to achieve. Maybe no resistor... I need to try and see.
nice 😎👍 explaining Man.
ohh muy buen proyecto amigo muchas gracias 100% recomendado!!!
de nada, gracias por mirar
Thanks man ❤
I know I'm late but I hope you are doing okay and I pray that you will get out of CHF. Get well soon
Great video! What would you change to make the delay greater?
okay this is gonna be weird and hard to explain, but i absolutely NEED this, can you make a circuit with a half second delay that then makes a half second +5v pulse?
great video! I'm starting to look at these circuits and it's awesome to see the basics of how everything works! this is a beginner question, but does the polarity of the capacitor matters in this case? also, why does not the capacitor discharges the current to ground and instead it discharges to the transitor? is it because of the polarity?
Hey - fellow beginner here but gonna take a crack at these questions for my own learning. I know it’s a year late also but maybe it helps someone else.
First - the schematic doesn’t indicate a polarized capacitor so you should be fine either way. If it had a curved plate in the schematic icon then that would indicate a polarized capacitor. He does use an electrolytic in the video tho, and ur more likely to find an electrolytic one at the values he’s using.
As far as “why does current only flow out the positive side”, the thing to remember is that current doesn’t actually flow _through_ a capacitor. Any current that appears to go “through” the capacitor is displacement current. Basically as you charge one side of the capacitor, you’re creating a displacement current that is opposite in polarity to the charge on the other side. If you’ve wired up an led in series with an RC pair then you would see the LED light up for a short time until the capacitor fully charges. This makes it seem like current is passing through the capacitor, but what’s lighting the LED is the displacement current created by charging the other side. Once the capacitor is fully charged then it no longer creates this displacement current and the LED turns off. Please correct any nonsense I’ve said here but to the best of my knowledge so far this should answer your question about current flow.
Nice, Could you please do a soft start circuit? Have been looking for one for high voltage in the range of 400 volts with no luck, building a mono block tube amp and want to delay the plate voltage until the filaments heat up, hence prolonging tube life, I could buy a delay tube but are quite pricey as are the amp tubes, and would rather go solid state to preserve plate voltage and power. thanks a million.
I liked this video because it shows and explains how this circuit works! I am also wanting to know if it's possible to take this delay circuit and use it for an application that runs on 120v 60hz 2.5 amps.
I'm coming to this with nearly no knowledge of circuits or logic gates, but I still could understand how this works. Before this I had no clue how you could possibly cause delay in circuits since electricity moves instantly(more or less) along the wires, but the concept of using a capacitor that you slowly discharge is really really brilliant!
This is called the RC constant (resistor-capacitor) and you can use a resistor to control the rate of charge and discharge of a capacitor. If you are interested in these types of things have a look at my videos on the 555 timer.
Your video is awesome. Just one question, why you didn't put any resistor in series with capacitor to limit the current? Will this sudden high start up current burn the source or capacitor?
There was probably a need for a resistor between the buttons on the base of the transistor.
That was a great man!! how we can make output digital 1 while the capacitor is around 5 v and 0 when discharged to around 4 v or less?
Another action packed youtube video
Hey i made a Door bell circuit using this circuit. at the end when capicitor charge goes out buzzer start sounding its dying. insted of lowering (diming the led) is there any way to cut down instantly the capicitor charge signal at certain level.
Excellent.
Thanks for the clear demonstration! Btw... you could’ve just removed the breadboard wire to the switch to prove your point ;)
Awesome🎸🔊🎶how do I get the boss MZ-2 pedal to delay longer...
Very interesting. good explanation. I'm looking for a solution similar to this design. No switch. 5vdc micro-b usb in, delay 60-90 seconds, the 5vdc out. This is to delay a Raspberry pi from power up before the TV comes ready. Sure, I see the 5v-30v delay relay timer module on amazon, but like you said - where's the fun in that. Any guidance is welcomed. Thanks
Very usefull video
With the proper capacitor this circuit will also work as a good buffer, right?
I tried this circuit with led cob the glow is not to its full potential what cud be the solution to it.
Tks
Thanks for a nifty lesson. Now, how can these same basic components be config for, a "delayed ON" circuit (ie, fridge alarm)?
Great video and no further delay
How do you calculate the delay
I am planning to use this setup to show a trigger signal
Reason: I might be fast on my reflexes but i might miss a 1 mS signal so im thinking "hold" the signal for a second or so.
will this delay be adequate or du i risk that the trigger signal is to fast to charge the capacitor?
T = RC At 1T cap loses 63.2%, depleted to 99% at 5T remember to sub the drop voltage of the transistor
Hi. Thanks for a good explanation. This might be a stupid question, but can a simple time delay circuit be made with a toggle switch? Instead of a push button that cuts the circuit after released the toggle switch would keep that circuit in the ON pushed or pushed in position with the push button switch and yet still switches off in a second or two. I do not know if a circuit is possible where it switches off while still in the ON position. To start the timer again one then need to then switch the toggle switch off and on again. I hope it make sense what I am asking. Thanks
great vid partner
I want to do this for a relay circuit, using a 12V DC relay. Only need it to be maintained activated for a couple seconds maybe in the event of an accidental button release (the button needs to be pressed and held to activate an intercom system using some telephones that are getting switched off of the regular telephone line which they are connected to in the NC state). How do I determine what resistors and capacitors I will need?
Seems like a fun circuit to build with salvaged parts.
I would add a resistor in series with your switch (maybe 100 ohms) to limit the current through the switch when it is closed. Drawing a momentary pulse of a few amps to charge up the 10uF capacitor could cause burnt spots on the switch contacts, and could cause a momentary voltage droop on the supply.
That is exactly what I am thinking. Not sure why there is no resistor to limit the capacitor current. Maybe the capacitor is too small?
Likely omitted for simplicity of the lesson but good point
Would this work with line level sound signals? I build horn speakers and midbass horns become too large to physically timealign with the smaller horns in the midrange and treble horns.
What about the V3205 bucket brigade delay chip?
Sir good video love you sir
I was thinking about something like this, but with a power (mos)fet. Would that work? I want to trigger (and retrigger) something and stay on for somewhere between 1 to 10 minutes, when moving a bicycle. So the switch will be one of those vibration switches. Current maybe 1 or 2 amps hence the fet.
Hi. I cant get any capacitors to work. What am I doing wrong. All caps are 50v 2.2uf to 100v 470uf. But caps have bin setting for a while 15years....and they check out with the multimeter.
How could you add a zener diode to make the change in current on the transistor base more abrupt?
Could a variation on this be used for an m-sync to x-sync converter? When an m-sync camera flash is used the flash bulb holder PC conector is shorted by the camera about 25mS before the shutter trips. For an electronic flash that prefiring leads to no flash when the shutter is open. The circuits I have seen have been fairly complex using an IC timer to trigger an SCR after 25 or 26 mS. Something simpler would be nice.
Could you show me how to make a mist maker using transistors?
How do u make it Waite to light up after clicking the button?
Will this circuit work with a 12v cob led for delay off
I followed the method you connect all the components but my led only light up when I push the switch and goes off after I released the switch button. Why is it like that? Need answer urgently. Thanks
Ime thinking of a non switch yet power up immediate positive signal then negative off after delay so it's going to be similar but with a pnp transistor to drive a relay coil
Nice!
Thanks for the video. I find it confusing when you said open up the transistor. If you take the pushbutton switch, it is normally open or not conducting until the button is pushed. Then the transistor is open or turned off until the current flows into the base, then it turns on.
Thanks.
Could I replace the button with a pir sensor, which when activated supplies current to a dc motor, and then have it turn off after 5 seconds?
Could this possibly work as a passive unit using the hot as a source and the ground as an out?