This is the receiver from the previous alarm system. The circuit is from Radio Electronics, April 1989, and has an LDR as the sensor. Optical devices should be used to improve performance.
It can be obtained from Mouser Electronics new tactile keys subminiature SMT KMR 6 Series C & K....
This circuit meets applications in remote control. It allows to control a motor from input pulses. The...
This sweep oscillator was found in 1980s American documentation and can be assembled with current...