Piezoelectric Buffer (CB21152E)

This circuit was found in American documentation from the 90s. It serves as an amplifier for a piezoelectric transducer.

Optical Intercom Transmitter (CB17327E)
This circuit is from old documentation but uses components still common in our market. The circuit...
bq7790x Battery Protectors ICs (COM059E)
August 2016 - It can be obtained from Mouser Electronics the battery protectors series bq7790x of...
Touch Dimmer (CB18757E)
This interesting touch dimmer was obtained in a 1993 publication, basically consisting of a...