Voltage Controlled Oscillator Using 555 Timer

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Күн бұрын

This electronics video tutorial explains how to create a voltage controlled oscillator using the 555 Timer IC. The control voltage pin or pin 5 is used to control the frequency of the output rectangular wave. As the voltage at pin 5 increases, the output frequency decreases. You can use a voltage divider network or a potentiometer to adjust the voltage at pin 5.
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Пікірлер: 35

@TheOrganicChemistryTutor 5 ай бұрын

Final Exams and Video Playlists: www.video-tutor.net/ Full-Length Math & Science Videos: www.patreon.com/mathsciencetutor/collections

@SMARTCHAMPSTUITION 4 жыл бұрын

Hello from London, another fantastic lesson, thanks for teaching all the pupils and sharing your amazing teaching. My nephews have been watching and learning from you. I'm not a student but a primary teacher. I've also started teaching my pupils on KZfaq during lockdown.

@misstan350 4 жыл бұрын

Yes, I learned so much from your lessons, I could have failed if not watched your lessons. Thanks so much, you are just God Gifted teacher.

@erin19030 2 жыл бұрын

I built a simple crystal controlled oscillator using the 555 circuit for aligning vintage radio IF stages. The square waves excite the IF transformers and they produced beautifully proportioned sine waves , good enough to do a clean sweep alignment or just the simple peak alignment tuning using a scope to monitor peak amplitude values.

@ministeriomundialliberando8403 2 жыл бұрын

Very well explained. I've just built one circuit with a 555, but with pwm control, from now on I'll try to add a freq control to it. Thank you a lot.

@williamserna7309 4 жыл бұрын

Buena tarde, excelente explicación y muy práctico.

@leoavalos6836 3 жыл бұрын

I was hopping to find this... you really save me

@075-inzamamashraf2 2 жыл бұрын

Most helpful video for 555 ic

@RicardoPenders 2 жыл бұрын

Thanks for sharing, I was using the 555 a little bit different, basically I normally don't use the pin 5 and only have a decoupling cap on that to ground. I didn't know that the frequencies you get out of the 555 timer this way has such a wide range. I made myself a crude function generator using a couple 555 timers, a few transistors, some opamps and a bunch of diodes and resistors and hey presto I got myself a simple function generator, fully analog and still capable of producing a wide variety of different looking waves. I'm even working on a little add-on so I can use it to match transistors using the function generator and my oscilloscope in the XY mode as a curve tracer, I love the analog stuff, it's more of a challenge but eventually when it all works it will keep working for a long time before it needs some TLC. My question is what's the lowest frequency you can get with this circuit and the highest frequency when you only change the two resistors R3 and R4?

@cagataytezsezen 2 жыл бұрын

Perfect explanation

@jagdishannepu7179 2 жыл бұрын

Thank you Sir!

@markrhine5809 2 жыл бұрын

Very, very good video on the 555 timer, just an ex job...

@Theineluctable_SOME_CANT 3 жыл бұрын

Good for pwm motor control also.

@trustjesusoursavior4179 3 жыл бұрын

What is the difference between control voltage to the trigger pin?

@wrOngplan3t Жыл бұрын

I'm not clear on if you measure Vs or simply calculate it in the table at 09:30. It seems the latter. But R3 and R4 are in parallel with the internal 5 k ohm resistors of the 555. R3 with two of them (so in parallel with 10k), and R4 with one 5k ohm, affecting the voltage Vs. Not that it changes anything in the video, there's still a frequency jump at the 3rd last step (In short. Managed to delete my comment)

@trustjesusoursavior4179 3 жыл бұрын

It means the voltage control amplifies the signal output? If you change the capacitor into variable capacitor connected to the Trigger pin, you will have Frequency changes?

@serdarkutluer5126 2 жыл бұрын

thank u

@williamnguyen1312 2 жыл бұрын

YES LIFESAVER

@sebaxxD1702 3 жыл бұрын

How do you calculate the frequency when the control voltage is plugged in with the formula?

@ministeriomundialliberando8403 2 жыл бұрын

Well, all you need is to use a math methode to calculate the unknown value, once you have those known ones.

@NiCeDarox Жыл бұрын

is the circle in the downer area a - supply?

@meme5831 Жыл бұрын

I have an arcade button as a kill switch on my guitar. Could this circuit be used to turm it into a rapid fire mod? The guitar itself has no voltage so I know Id have to power it with a battery.

@hakank3841 2 жыл бұрын

Hello, should the C1 must be electrolitic or can I use normal plastic or ceramic cap which have no polarity?

@sourcraft7436 2 жыл бұрын

idk. i think either one tho

@mr.sachin.c.n.shetty3681 3 жыл бұрын

Hello from INDIA, how can you relate frequency out with Va? Can you justify?

@tgwadelammmrsa2162 2 жыл бұрын

Look at the formular for frequency, R4 is indirectly proportional to the frequency, and when you change the value of R4,Va value is affected,so that's how frequency relate to Va

@chibuzoeze4225 3 жыл бұрын

Can I achieve buck - boost converter through this?

@owenkegg5608 2 жыл бұрын

Of course

@jj74qformerlyjailbreak3 2 жыл бұрын

I don’t know about anyone else. I have my timer running at 2.3v input. And these octave changes are .1v. It’s only drawing .050A at startup then settles to .004A I’m trying to get a frequency