Institute Newton C. Braga

Circuit Bench

Transistorized Voltmeter (CB21664E)
This simple voltmeter was found in Popular Electronics from May 1968. The circuit makes use of a...
Magnetic Pickup Preamplifier (CB14143E)
In recovering vinyl media with turntables with magnetic capsules the circuit below can be useful. It...
Electronic Brooder (CB4455E)
This circuit controls the temperature of heating elements, which may be lamps covered with...