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Keypad to Serial Converter

Keypad to Serial Converter
 Keypad to Serial ConverterKeypad to Serial Converter 
Our Price:  £4.99(Inc. 20% VAT)(£4.16 Exc. VAT)Earn 4 Loyalty Points

SKU:  PPAC0011
Part Number:  AC0011
Brand:  Proto-PIC
Requires Soldering:  Yes

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Membrane Matrix Keypad  3x4Membrane Matrix Keypad 3x4
  (1 Review)

This great little board is supplied as a kit, with the PCB, Capacitor, Headers & a Chip programed with the code, ready to go. Once you have assembled the kit, connecting up a keypad like our 3x4 membrane matrix keypad. will give a character output at 9600 BAUD when a key is pressed. The keys do not auto-repeat, making key entry easier.


Key output from a 4x4 matrix keypad


1  2  3  A

4  5  6  B

7  8  9  C

*  0  #  D


With a 3x4 matrix keypad, ignore the right hand column.

If you require these assembled, please contact us. There will be a charge for this service.

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Customer Reviews
Average Rating (1 Review):  
Write a Review and share your opinions!

Great product - and all for me.
Tuesday, 27 March 2018  |  Kieron

I wanted to connect a keypad to my Arduinio, but I only had 1 pin left. I called the tech guy at proto-pic and after a discusion about my choised, he offered to design a custom board to make the keypad connect to a serial pin on the arduino. I connected the keypad to the board and the board to my arduino, I have now got a fully working project, using all the I/O ppins on the Arduino UNO.


This review has not been appraised.


Hi Kieron - we're always glad to help, and it's customers like yourself that inspire us to design new products. Good luck on your future projects.

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Membrane Matrix Keypad  3x4

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Proto-PIC - UK Distributor of Sparkfun, Arduino, BBC Micro Bit, Adafruit Electronic ComponentsProto-PIC ; UK Distributor of Sparkfun, Arduino, Adafruit, BBC Micro Bit electrical components