Keypad Circuits

  

Circuits




Using eight digital inputs, this circuit simplifies decoding of the common membrane 4x4 keypad matrix and eliminates the traditional requirement of scanning rows or columns. Any X-Y switch matrix, ...

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...

On my current circuit (its a electronic poker chip device) currently the inputs are PTM which send out pulses, however, I would instead like to give the option for the user to input the amount they...

From circuit boards and keypads to delicate micro chips and capacitors, high-speed laser marking is the answer for many manufacturers. The specialty laser marking solution for your electronics part...

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

This simple circuit is the electronic version of the combination lock. Using the special purpose LS7220 digital lock IC, the circuit allows a 4 digit combination of your choice to activate a relay ...


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


electronic safe with keypad entry and solenoid lock


Electronic security code lock system - Door Lock - Safe Lock


FT-817 External Keypad - Demo