Institute Newton C. Braga

Circuit Bench

Voltage Doubler (CB21823E)
This voltage inverter circuit was found in a Mullard transistor manual from 1960. Information on...
Light trigger with Schmitt and SCR (CB23963E)
This fast-acting circuit was found in the July 1969 Radio Electronics magazine. The trigger point...
Headphone Amplifier (CB4518E)
This circuit is quite old, from 1964, but can still be mounted with BC558 transistors. The circuit is...