Institute Newton C. Braga

Circuit Bench

Audio signal generator (CB8044E)
Despite being from a 1969 publication, the transistors used have current equivalents such as BC548 and...
Sawtooth generator (CB12679E)
The circuit shown in the figure makes use of a programmable unijunction transistor of type BRY39...
500 ohms Audio Amplifier (CB13668E)
We found this audio amplifier stage with 500 ohms of input impedance in an old American...