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.

Field Strength Meter (CB22025E)
This aperiodic circuit was found in an old English documentation. The transistor can be any JFET...
Micro FM Transmitter (CB18590E)
This FM transmitter circuit was found in a Japanese publication in 1975. Equivalent transistors can be...
Crystal JFET Oscillator (CB22031E)
This circuit can oscillate at frequencies up to a few tens of megahertz depending on the crystal. The...