This 3-component circuit uses an analog indicator. We found it in an old publication.
This Set-Reset (RS) flip-flop uses an integrated 4001 or 4011 in addition to some external...
This is the basic configuration of the LM339 as a comparator, requiring a 3k (3k3) pull-up...
This circuit is a siren with manual modulation that, instead of exciting a speaker, excites...
