AC voltage control (CB8904E)

This circuit was found in a 90s Hands On Electronics. The semiconductor component is a Triac of the time.

Small Amplifier for Handset 2SB77 and 2SD77 (CB18861E)
This small earphone amplifier with germanium transistors was obtained in a Japanese publication from...
5 V x 10A power supply (CB15926E)
This powerful regulator, shown in the figure is for 5V (TTL) is suggested by Motorola and makes use...
Operational Overcurrent Switch (CB12313E)
We found this circuit in an English publication in 1991. The circuit can be assembled with...