100 Hz Second Order High Pass Filter (CB25815E)

This filter with the 741 op amp was found in the February 1995 Electronics Now magazine. The power supply must be dual.

Differential instrumentation amplifier (CB9841E)
This instrumentation amplifier with differential inputs was found in documentation from the 90s....
Wattmeter (CB23581E)
This circuit is from a Radio Electronics magazine from December 1958. The indicator instrument is analog...
DC to DC converter (CB8749E)
Found in a 90s 303 Circuits, this circuit has an output power of 100 mW. L1 consists of 890 turns...