This TTL circuit for digital signals up to a few dozen megahertz was found in old documentation, but can be easily assembled today and even used as a shield for microcontrollers. Power must be supplied with a 5V voltage.
This circuit locks after a short touch on the sensor. The circuit can be powered by voltages from 5...
If you have an old cassette player or bought one from a junk shop, you can set up a small table...
August 2017 - Mouser Electronics already has the Connect One Pico WiReach ™ SMTS Pico modules...