This peak detector has a memory to prolong the response. The circuit is from American documentation from the 1980s. The supply does not have to be symmetrical.
The circuit bellow shows how four inverters [NAND, NOR or Inverters] Kim - This could be NAND,...
This circuit came out in a 1978 American publication, but can be assembled with transistors BC547 or...
This is one of the many modulated siren versions that can be found on our website. We found it in a...