Schmitt Trigger 7400 (CB22419E)

This low hysteresis circuit was obtained from old documentation. The circuit must be powered by a voltage of 5 V.

Inverter source (CB8132E)
Found in a 90’s 73 magazine for radio amateurs, this circuit provides a few milliamps of output...
Crystal Radio (CB12199E)
The coil consists of 100 turns of wire 28 in a wooden or PVC tube from 2 cm to 2.5 cm in diameter with...
Simple Preamplifier (CB931E)
This circuit uses two JFET such as the BF244 or BF245 and has an excellent gain with small...