Institute Newton C. Braga

Circuit Bench

Capacitance Switch (CB4993E)
Although indicated in the original publication of the 1980s as a capacitance switch, the circuit...
AND Gate LM3900 (CB14201E)
In the figure we have an AND gate with the LM3900 operational transconductance amplifier. The...
Voltage Monitor (CB11028E)
This circuit was obtained from a Hands-On Electronics, an American magazine from January 1987. The...