Institute Newton C. Braga

Circuit Bench

Volume and Bass Control (CB19187E)
This partial circuit that must be added to a preamplifier output transistor as in CB19186E...
TTL Who is the fastest (CB4884E)
This 4-competitor TTL speed game was obtained in a 1980s documentation, but can still be easily...
Locking Touch Switch (CB1523E)
We find this circuit in an American publication of 1978. The integrated circuit is the CMOS 4013...