Electronic Circuits and Software Related Electronic combination lock with PIC Microcontroller This is an electronic combination lock to use with an outdoor gate. The functionality is implemented in software. It turns on a relay (usually to open Light flasher circuit This circuit will generate signal to flashing the small lamp about every 1 second.The flashing rate control by adjust R1.The rate voltage of the lamp Two Pushbutton Motor Controller Two small pushbutton switches, a few diodes and two relays form a method to control on/off power to a brush motor as well as the motor direction. The Telephone Remote Switch This device connects to the telephone line and can be used to remotely control up to 4 relay outputs using a DTMF (tone dialing) telephone. A number o Light Activated Switch This is a light switch or light activated switch circuit.The relay on when LDR uncovered and relay off when LDR covered.Adjust VR1 for light sensitive
