Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Needed a numeric keypad to PIC16C621A interface

Status
Not open for further replies.

nkosana

Newbie level 1
Joined
May 16, 2011
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,287
Hi,
I'm trying to replace a lost keypad for a scoreboard using four 7-segment display. My circuit uses a PIC16C621A-04P microcontroller. The inputs from the keypad goes to pin 11 of the PIC and also through a 10K resistor to pin 10. The cct also uses a CD4504BE CMOS Hex voltage shifter, MM74C164N shift register, and MC14511BCP decoder/driver. I do not have a cct diagram and not very familiar with encoding ccts. HELP!!
WILL AN EXTERNAL COMPUTER NUMERIC KEYPAD WORK?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top