Jason, I recently found you and, I think you're great to do these tutorials and lessons. THANK YOU, Jason! 🙋🏻 - sarah

Thanks once again, another great tutorial putting me that much closer to understanding choreography that exists between the 555 timer and the other components. I'm a novice and though I've always had a fascination about microelectronics and how they worked (for well over 50 years). I was able to purchase a Signal Function Generator and a basic Oscilloscope recently. This boosted my understanding and really revived my interest in this field (strictly as a hobby for me). I coupled the scope and generator with very good tutorials such as yours, and I think I've probably learned more in the last 1.5 months, than I have in any 10 years of the time I spent teaching myself using trial and failure techniques. I have noticed that you don't seem to note the size of the capacitors (and a few other components), in some of your videos. Perhaps, if you just flashed a list of the components that you used in the tutorial at the end of each video for 2 seconds? Maybe just for the smaller, simpler tutorial videos, (I have no idea how much trouble that would be, so I understand if it's not practical). Thanks again, Rich

I'm really glad you don't use 'engineering' terms. Your video's are so much easier to understand. I will be signing up for newsletter and downloading the schematic. Thanks you for your tutorials

this guy has just 10k subs? make him famous for all the work guys please

Bravo! Every time I learn something with this hobby, for once again I am thinking why I didn't think before that trick with the diodes? Until today I thought that 555 timer is capable only for 50% -100% duty cycle and I was reversing that by using an NPN at the output as inverter logic gate.

Congratulations Jason!! You are a very good teacher. Thanks for helping us that want to learn. Cheers :-)

seconded... good video! not too basic, not too confusing. easy to follow!

Another great video. Can't wait for more. I'm getting a lot from the explanations, your examples are clear and using the paper bag to draw out the circuits makes it all the more clear.

Jason, I am enjoying your videos! You are one of the best teachers I have seen! You make understanding electronics fun and easy, keep up the great work and thanks for devoting your time to do this!

Great video, just the right amount of technical detail and very clear explanation. Thanks

its been years and years since I last saw this type of motor... my childhood memories of opening up and examining the toys :-)

I think you have a gift for teaching. Excellent.

Brilliant teaching - thank you. Love the bits of card and paper bag :)

Just viewed this video. In which you use what was known as conventional theory, ie current flow in a circuit is from positive to negative ( which only occurs in a power source, batteries, generators, etc). Whereas in circuits external to power supply, cuttent flow is from negative to positive. The symbol for the diode was created while conventional theory thought to be correct for power sources and load circuits. For a diode to conduct, negative potential is applied to the banded end and position potential to the other end of the diode. Based on these the current flows through the circuits would be opposite those describe in the video.

A very clearly, well explained tutorial video. Exactly what I'm looking for to fine speed control a motor driven astrophotography camera mount. Thank you.

well done, great way to explain

You are awesome. Your videos help me a lot. Thank you bro..

Wow. The very best 555-Timer Howto I found so far. Very good explaination, very nice done with the drawing and Breadboard. Thumbs up & subscripe

Big thanks for your videos. BTW if u take both R1 and R2 as a variable resistor you will be able to control both on and off pulses at least this happens in simulator, so you can control the duty cycle from 0 to 100 percent almost.

thanks man!, I was figuring out a way to control a toy motor with a 555 timer just like you did, but I'm also trying to change its direction with an H bridge and a switch, but I had troubles varying the duty cycle so thanks now thats done

I'm glad I found your channel! I really enjoy your videos

You like to teach and you are good at it...thanks!

Thank you so much for your videos, I made a simple circuit with an LED and did not connect pin 4 to Vcc but it still worked? But it was very low frequency!! I mean on for a few seconds then off for a few etc. Still at least I know more about the 555 timer now!

Other than the isolating aspect of isolated gate drivers, is there any advantage in using a gate driver between a MOSFET and a 555?

I needed a 1uF capacitor bridging CVV to GND to prevent overshooting at the start of the cycle. With a 12V input, max voltage was 20V.

Great teaching. One question if you still pop by here. The timing math for the 555 I guess you use ohms for the resistor and farads for the cap so when you have added them, multiplied and divided them what is the answer in?

Your a GREAT teacher!thx for your time

Excuse my how would an astabel mode 555time duty cikel by controled if the trigger uses an inductor like pick up coil can the trigger path by modified?

Nice view from the windows!

very good video, thanks a lot!do you have another video show how to create irregular pattern pulse?

Hello and thank you for your very informative videos. I am looking for a circuit or a signal generator capable of providing a rectangular signal varying from 0V to 5V, but with a rise time of 30ns. I want to apply this signal to the reentry of a microcontroller. Very cordially

A question: So If both input (of flip-flop) were zero then flip-flop will the keep that bit until next change is applied to the input, right? by the way this video is awesome, it's very good for beginner. And the reason why this kinds of video are awesome is you'll need a simple term to explain the complex stuff. and it's always hard to find the right terms.

11:54 I was saying to myself, "that scope should be able to display the duty cycle". Then he enabled it. 🙂

Well,nice video but i suggest you to use this circuit of 555 timer which has adjustable frequency (PPM signal) to control a stepper motor's velocity(each pulse->steps the motor.....pulse rate->motors velocity).Now there is an another circuit works with 555 timer which produces stable frequency signal with variable on-off time of the signal(PWM signal),so the second one can control a dc motor (pwm controls the applied voltage and and dc motor speed is proportional to the voltage).Make a video of that!

nice explanation. how would you change the pulse width without changing the frequency? does it require a dual-gang resistor for R1 and R2?

Good explanation, very useful. Thanks admin......keep it up

Would you please explain in brief about pin 5 of the ne555 timer ic.

Hi! excellent video, thankyou very much. I wanted to know though, what's the voltage on the output when it's on high..and how does it depend on Vcc ("power supply", on this case 9V). I want to use it on my car, so i will use 12v as Vcc and i need 5v on the output to used for a servo signal.

Your explanation is good, but visual illustration should be made much bigger to be easily seen and that viewers could easily follow what you explain. But still it is a good job!

can you control duty is not relation frequency?

do you have a formula where I can set a specific duty cycle and frequency to find the values of r1 and r2?

Great video thanks! Now I have a better understanding of the way it works, do you know of any links to help me with calculating which resistors and caps to get certain duty cycles? I'm trying to build an Led strobe so it lights for around 2ms, with approx 10ms cycle (100hz). the idea is to monitor rpm of a spinning disc. Any tips would be appreciated!

Super sir , I need to know that how much of frequency produced by this 555 based circuit

can't wait to try thanks great explanation once again

What if I want to power it with 4.5v should caps and resistors changed?

In this setup, is it required that 6 and 7 be connected.

initially when the supply is given from pin 8 and the current starts flowing towards the capacitor through the diode,but won't the current pass through the transistor and then to the ground at pin 7?

Better than my teacher. Thanks for saving my bacon.

hi! I was wondering which npn transistor did you use? I tried it with 2n222a but the speed doesn't seem to increase. thank you for the video!!

By this way - can It use to Desulfator batt circuit ? I mean @10% ON - coz, on another video they said 555 doesn't allowed It, Thank You, so much

Have you try to get to 50 or 60hz with 555 timer I try every valve there is and I still couldn’t get 50 or 60 only 107hz so if you could figure it out on video that would be good cause there is not a violation on KZfaq about this to inverter with

What would happen if instead of this setup you had a potentiometer between pins 6&8 with the slider to pin 7?

Great video, nice work! But, to vary the duty cycle without affecting the frequency, should I use a single pot connected in R1 and R2? I use ordinary silicon diodes or need to choose special models for high frequencies? (I want to maintain a 2 kHz working frequency)

If you are using motors or other devices that create inductance you should be advising the use of flyback diodes across the motor. This is probably why you had heat.

Hi sir, I've done this tutorial using LEDs so now I can control whether it'll blink slow or fast. I'd like to ask for your suggestion as to how I can manage to have a blinking LEDs to switch manually to a steady on state. I'd like to have an outcome where I can manually switch my LEDs to OFF, ON and blinking state.

Forgive me but i read your channel name Skinny D, after some time i noticed R &d

You might need a whiteboard. Good vid!

Hy. Thanks again for your video.... very good explication. Actually I need to do a circuit based on 555 family and i want to have a 50% duty cycle and be able to change he frequency from 30 Hz to 30 KHz. I tried some possibilities but it did not worked. so, i thought that you have an idea to do this. thanks a lot.

Great video, thanks for sharing.

awesome video bro, great explanation, please keep them coming ))

How will it work by puting 3 pin pot,midle pin on the diode - end,so when you turn pot fully one side you get one big and one small resistance?

Thq soomuch..❤

great video - thanks a lot. How would you change the duty cycle to an irregular pattern (eg for communication as you mentioned at the start of your video)? Now subscribed!

thank you bro for ur great video

Can you tell us how a NE555 with an Operational Amplifier as a comparator where it can be used to Modify PW as a quick and dirty solution for PFC of an offline SMPS? That would be awesome! I've been making astables with BJT's, but I just got some NE555s, and you brought it to my attention in a previous video that if you supply a voltage to one of the pins, it will modify the PW. Of course I'm driving the MOSFET with an NPN-PNP common emitter configuration. There doesn't seem to be a complete tutorial on offline SMPS Topology. Your'e a good professor and I( I believe I can speak for others based on what I've seen posted on various videos) would like to see a playlist on the topic, if it interests you of course. The Post Apocalyptic Inventor came the closest in completing a detailed tutorial playlist on Switch Mode Power Supplies.

Is the wave completely positive?

I have been struggling with a PWM, a 555 timer & have burned up several 555 units. I think you are answering many of my questions. I've known about the transistor, but the transistor should be supplying the power independently of the 555... many horrible KZfaq videos I've been following and all they do is get you into days & days of wasted time.

Great video. Thank you

Need not forget the counter EMF flyback diode in parallel with the motor.

Hello, with this method, can i achieve a tiny duty cycle by putting R1

can i control 1 rgb led with only 1 555 to create different colors?

I just completed this configuration and this is version 4 or 5 at this point. I've been at this for apx. 1 year. I've been trying to get control of a fuel injector's duty cycle. All I ever get is 50% duty cycle. I just rebuilt the entire circuit again, I did it exactly like you have in your diagram & I can remove the caps & its apx. 50 percent duty cycle (caps are removed at its 50% duty cycle). I can never get the injector to open for 1/10th the time it is closed. Am I the only person who has built your circuits? Everyone likes your circuits but nobody has attempted to make one. Just removed everything, its flashing at a constant rate without the 555 in the board.. lol

Thank you so much.. you r just awesome

hi..thanks for tutorials,uts really helpful, please show how to convert square wave output of 555 into sine wave.☺

Hello! I am not sure why you have connected 9V to the pin 4 of the 555Timer. Is it because you can disable the Master Reset through this way? As in, that's a PNP transistor, and if you put 9V to the base of it, it will be in cut-off mode?

Nice video! Can you follow up on how to control the duty cycle with a voltage? I want to PWM a PC fan attached to heatsink, and vary the duty cycle according to the voltage from a temperature sensor. After quite some Googleing found 2 555 solutions. One uses 2x 555s (or one 556) and pin5 magic. The other uses a 555 to create a triangular wave and a comparator for the PWM. I can dig up the links from my notes if you are interested.

can u give me some advice on using the 555 ic to control a cd4017be ic to switch the output on it thanks

how can i use ic 555 circuit as power on/off circuit for application such as night lamp. if i have to switch on lamp every night for 8 hours and switch off it after that.... can i use ic 555 for such a long duty cycle

Nice Vid! I'm subbed, thanks!

Question: When pin 3 (output) goes low, would that turn on a pnp transistor and when it goes high it would turn on a npn transistor?

How to make low duty cycle ramp signal?

hello can anyone help me i need circuit 1-100hz with independently adjustable duty cycle to control fuel injector.any ideas?

how i count vale of all components. which diode are these D1 D2

I want a pwm signal of 200khz. Is it possible to get it using IC555 timer? Can u suggest any other way plz?

such goodness!

what is C2 for?

Thank u

Hello, Great videos. All the videos are great. I teach physics and some of my students are working with wildlife biologists to shock fish so they can tag them and when they wake up, let them go. The fish never get hurt. I am trying to advise them on making the device. My hobby is electronics. My plan is to create a voltage source (0-40V) with variable dc pulsed voltage, duty cycle, and frequency. I am using the mains voltage (AC 110V) , (fish are in a tank for testing) and stepping it down to 40 Volts. I am trying to find a ways to vary that voltage and display it. I think I will use voltage regulator LM317 (only max 40 V) and a panel meter to display voltage. I plan is to use a 555 time like in this video to vary the duty cycle and frequency and an IRF510 MOSFET to pulse the voltage from the 555 timer. Am I on the right track? Any suggestions? Thanks! Curtis.

how do i change the direction of a servo motor

What is the value of capacitor in uf and volt??

Hi, I have made a monostable multivibrator using 555NE timer ic. What observing is it is getting triggered automatically when some electrical appliances are being switched on or off in the house. So is the 555NE prone to pickup noise or problem is something else. Can you think about it plz if you get time.

Great vedio. But needs lettle electric background for sure

I do not know anything about electronics but it seems to me you could use a trimmer potentiometer to play around with different values and view on a scope. I am sure they sell this as a unit but have no idea what it is called.. I guess it would be called a variable signal generator. Read more www.resistorguide.com/trimpot/

I want t1 to be 1 hz using a 100 uf cap how do I find out the resistor

What is the formula for frequency?

FYI You were getting the jumpiness of the motor due to too slow of a pulse frequency. If you used something more like 500 hertz you would not have the motor jumping like it was.

Me again sorry I've been reading a lot and finding out that Hobby Servo's need to be controlled by PPM not PWM as pwm can harm the motor or speed controller . I'm trying to control the speed of a 9 gram RC servo for an airplane to slow down the movement of the landing gear . Any ideas or suggestions would be excellent

Not strictly correct as far as I could see. PWM maintains the same frequency, only the pulse width changed. Your example appeared to change frequency. I have not checked out the circuit to verify this.

how about to get a sinusoidal wave out of it?

I really cannot understand why are you stressing on the fact to use a transistor. How will a component burn up? Please explain.