Circuit diagrams and schematics - Electronic projects

Velleman’s MK160 remote control acts as a mobile phone activated relay to turn on lighting, heating, open a gate, simulate presence, or activate an alarm. The remote control works by sensing the backlight on mobile phones that light when a call is being received (activated spare cell phone required and sold separately). This eliminates phone [...]

A few designs for remote control switches, using VG40T and VG40R remote control pair, are shown here. The miniature transmitter module shown in Fig. 1, which just measures 34 mm x 29 mm x 10 mm, can be used to operate all remote control receiver-cum-switch combinations described in this project. A compact 9-volt PP3 battery [...]

Here is a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view of its simplicity and a totally different concept of generating the [...]