Found in the 1991 Electronics Experimenter Handbook magazine, this circuit has good power and is recommended to be triggered by light.
This simple timer is from a 1998 publication. Other operational amplifiers can be used, and the...
August 2017 - Rectron's Schottky Barrier Diodes can now be obtained from Mouser Electronics. The...
This circuit limits the intensity of an audio signal from a control voltage. The circuit is from a...