One-transistor oscillator (CB22064E)

Capacitors C2, C3 and C4 determine the frequency of this simple oscillator. Transistor can be general purpose equivalent.

Digital CMOS Switch (CB16601E)
This bistable touch circuit using CMOS technology controls a relay. The supply voltage must be...
20 plus 20 W BTL Amplifier (CB18818E)
This amplifier, found in a documentation from the 90's, is based on the well-known integrated...
7 to 13 W amplifier TDA1512 (CB15983E)
This audio amplifier with differential input steps is designed to operate with asymmetric sources...