Emitter Follower Complementary Stage (CB25623E)

This circuit was found in the October 1993 Electronics Now magazine. The circuit can be used in a small audio amplifier.

Motorcycle Timed Alarm (CB16869E)
This circuit can use a pendulum sensor. We found this configuration in a 1994 publication. The...
Photoelectric alarm (CB8337E)
This circuit is from a 1964 Electronic Design. The sensor is an LDR and the transistors are...
Preamplifier and Vox II (CB19993E)
This circuit works both as a preamplifier and activates a relay when speaking in front of the...