The largest Electronic Circuits Database on the Net

                              

Keypad Circuits

  

Circuits




This is a pic based digital lock circuit and it used PIC16F628A. 16x2 LCD is used for the display the information and keypad is used for enter the code. (#) will clear the display and (*) will ente...

Hey (I apologise if this is in the wrong place), On my current circuit (its a electronic poker chip device) currently the inputs are PTM which send out...

This Digital Electronic Lock Circuit Diagram shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad. The first 4 outputs from the CD4017 decade co...

A digital keypad lock / opening circuit. Build your digital safe or alarm, which is operated by entering the right codes on a keypad.

The Keypad must be the kind with common terminal & a separate connection for each key. On a 12 key pad look for 13 terminals. The matrix type with 7 or 8 terminals will not do. On the Support Page ...

A digital combination lock using a push button keypad. The combination can be changed and the lock has an entry delay. Notes When wired to a ten-digit keypad, the circuit will recognize one 4 digit...


Electronic Keypad Lock Project using 8051 Microcontroller (At89C51) with circ...


Matrix Keypad


Keypad lock


electronic safe with keypad entry and solenoid lock