Found in an old Popular Electronics this circuit can also be adapted to be used as a shield. In this version the control can trigger loads from the light that falls on an LDR.
Any high-gain Darlington transistor can be used on this touch circuit. The load can be formed by...
This sophisticated transmitter was found in the June 1993 issue of Electronics Now magazine. The...
Antenova Grandis antennas can be purchased from Mouser Electronics for frequencies from 868 MHz to...