This circuit mimics the trill of a bird. We found it in an American documentation from the 90s. It is based on the LM3909 integrated circuits.
This circuit is from old documentation but uses components still common in our market. The circuit...
August 2016 - It can be obtained from Mouser Electronics the battery protectors series bq7790x of...
This interesting touch dimmer was obtained in a 1993 publication, basically consisting of a...