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.

Variable astable 4093 (CB21127E)
This circuit was found in a Popular Electronics from the 90s. The circuit has 4 frequency ranges...
12 V Rhythmic Lamp (CB460)
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
Antique Mini Transistor Amplifier (CB11872E)
This circuit is from a 1953 publication, consisting of an AM radio with 3 germanium transistors that,...