Free Electronic Circuits & 8085 projects

Electronic projects with circuit diagram and 8085 microprocessor projects.

Wireless remote controlled phone lock circuit

Published on Apr 26 2011 // Automatic control circuits

The phone lock key in the form of using the remote control, remote control by the owner of the home or office responsible person in charge, unlocking the implementation of the device installed in telephone charges, only press the button on the remote control, phone lock was only open phone number to dial out. But "119", "110", "120" and the other two telephone numbers from public phones lock limit foreign influence did not answer the phone. The circuit is no external power supply, or the use of mechanical locks, so it has some practical value.

Wireless remote controlled phone lock circuit.