Hartley for 1 MHz (CB25588E)

This oscillator was found in the July 1993 Electronics Now magazine. The coil is wound with 28-wire in a 0.5 cm shape.

Rain Alarm (CB15108E)
This alarm, from a 1996 magazine, can be fitted with two BC548s in the original configuration...
Simple touch switch (CB9563E)
Using only one general purpose transistor this circuit is powered by batteries. The lamp of the...
Programmable attenuator (CB9031E)
Can be used as a shield, this old American documentation circuit offers digitally selected...