Delayed lighting (CB22107E)

This 12V incandescent lamp switch with time delay was found in old documentation. The SCR can be the TIC106 and the transistor the BC548.

5 W Class Amplifier (CB13674E)
This unusual audio amplifier configuration was obtained in a 1974 documentation. The PNP...
High Power MOSFET Amplifier 4 (CB10996E)
This circuit was obtained in a 1990 English magazine. The circuit can be assembled with equivalent power...
Light Level Meter (CB21049E)
Found in National Semiconductor documentation, this logarithmic meter is powered with a voltage of only...