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Here's a video of Experiments 21 and 22 from the Make: Electronics book.

I didn't explain the second experiment (switch de-bouncer) very well, but imagine you have a circuit that counts how many times a button is pressed. You need to de-bounce the switch so that your circuit will only increment the count by one for each press. Without de-bouncing, you will get false increments for each "real" press. Any physical switch (push-button or otherwise) is prone to creating this kind of error, since it is likely to make-and-break several times at the threshold of switching. In fact, by the time you get to this experiment, you will have experienced that phenomenon in previous experiments.

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rohit kukalekar's profile photo
 
hello...nic vid!!!..:)
im doin dis project as my assignment....but im facing problems.......could u pls help me sir ?
im wondering if u cn use a tag switch as a toggle instead of using toggle...if so could pls tell me d lay out(ckt)...nd wt is d value of capacitor u usd,,,0.01 o 0.001?...thanks alot sir...:)
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