Keypad Circuits

  

Circuits


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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, ...

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 ...

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...

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 ...

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

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...