Peak detector circuit tutorial for beginners

A tutorial on peak detectors and an example that uses the clapper circuit from my comparator tutorial video.

#Electronics #Science #Engineering

[Unordung]

We miss you man, I hope you are well.

[RolandBanc]

You Sir are amazing! You explained this topic in an interesting, fun, but still usefull way. Thank you for makeing so great and understandable videos!

[philbx]

Thanks much for another 'real-world' example again explained so well ATM.
This is just what I was hoping for as a next step. Fantastic work!

[batiatto]

these videos are just great. this is the way a professor should explain things all the time.

[lecongminh]

You're like god to me. Now everything I've learned in 4 years college comes back and hit me in the head, and I go in every single of your video. I wish school adds practical cases like this in teaching, it'd make it so much better.

[tswdev]

You just showed us how we can analogically create the PTT holder that many voice conference programs have, when you have voice activation and you want to make the transmition smooth by not stopping the transmition when you pause your speech for a tiny period.

Very good :D

[RickM]

I wish I had had a teach like this when I was in High School... I might had stay with it longer. But these videos make my hobby so much more fun! Nice tutorial. Keep them coming

[CARlosDAN]

Excellent friend, you earned a new subscriber from Venezuela. Thanks for sharing.

[juntendo]

I find your videos very straight forward and easy to understand!

[kndro]

i really learn a lot from your tutorials man!

[Afrotechmods]

@coolnitroguy Google "RC time constant" for more information. It takes roughly 5 times the time constant to fully discharge the capacitor.

[humayun]

Oh man You've cleared all of my fucking concept which i couldn't learn Reading the Electronics Books Again and Again

[ivanv]

@Afrotechmods the best part is that you can trigger it for hours and is an active circuit capable of handling up to 200mA on the output! Not every IC does that.

[InsurgentX]

Great tutorial. And I love the burnt alligator clip ends: Proof Afrotech has a dark side!

[olajideoyekunle]

Good one and many thanks. Very short and apt video. Your subscriber base just increased by one.

[odedejikehinde]

Thanks Afrotechmod, this is short, concise and really helpful little circuit 😉 .

[pokerus]

Your videos are really helpfully, and your explainations are very easy to understand. Keep making videos and I'll keep watching

[宝宝-nq]

Thanks, sir, hope you are happy and healthy!

[bobd]

yes, i enjoyed seeing your video as it is close to something i'm working on.
and am tempted to use your MIC amplifier idea instead of the max4466
and 9814 modules bought on ebay. except the 9814 has AGC which
is a problem solver in itself. for my projec tthe comparator step you do w/ an op amp
is handled in code with an if-then statement

overall it includes taking sounds that are brief and intermittent and capture them
with your circuit plus a Picaxe uC with ADC pins. a 20M2 at this time

lots of new ground to tread . with many interesting challenges along the way .
practically everything is an unknown when doing a big project like this for
the first time. here are some of the problems that have arisen along the way :

a) figuring the gain for stage 1 based on the volume
of the incoming sound

2) determining the R-C values so the cap' voltage fades enough
to be taken as a new sound when the ADC is looping-repeating every 250mS or so

3) test the ADC level output of each sound w/ the uC to be above some threshold in a 0-255 space
and keep track of how many sounds over one second meet a volume spec'. etc.
this is the comparator step mentioned above ... done in code.

4) re-learning the exponential equation for cap's : V=Vc * e ^ t/RC

5) lastly is managing the voltage levels with the FVR2048 voltage reference
directive so the ADC uses its converting voltage space most effectively

a few things yet to learn :
a. how to deal w/ the 9814 and its mid-range DC offset ... what does the ADC do with it ?
b. to store the count of noises in inner 1-dimensional arrays or ext'l EEprom ... ??

another matter is not knowing precisely when the uC samples the ADC pin.
the PIC uC's dont give you access to the inner register bit change when 'GO'
happens. so right now the best i can do is code a 100uS pulse before and
after the readadc command. then, on the scope, the 2 pulses serve to frame
when the adc pin does its sampling. this allows seeing how well the ADC
aligns with the peak detector when the DC voltage is flat

such a simple looking circuit leads to many new directions. and stops your
progress every time you run up against the end of your knowledge.

then you might find yourself searching u-t for others who too have tread this path

i'll be looking thru your other videos to see if you are including uC's ...

[justinle]

Perfect explanation ... Very clear n concise!!!!