Instrumentation amplifier (CB9842E)

This very high impedance circuit was found in documentation from the 1990s. The configuration can be adapted to use modern operational amplifiers.

Battery Monitor (CB6067E)
This simple circuit has its trigger point set in the trimpot. The transistor can be any general...
Voltage tripler with the 555 II (CB1240E)
This traditional triplier configuration with the 555 can be found in other articles on the...
TTL Logic Probe (CB1461E )
This circuit is from a 1977 documentation. It is powered by the power supply of the circuit under...