help me plz - A 3x3 keypad doesn't work.

Thread Starter

jacobd12

Joined Jan 27, 2016
3
I am designing a keypad on circuit wizard. The diagram works fine , however when I use copper tracks and flying wires on my PCB version it does not work please help!!
This is the keypad wired
upload_2016-1-27_21-12-2.png
 

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RichardO

Joined May 4, 2013
2,273
What switch are you using? Most switches like like the one you show have a short between pairs of pins to make it easy to do a single sided PCB.

My guess is that you have the switch wired such that the internal switch connections are causing shorts in your circuit.
 

bertus

Joined Apr 5, 2008
20,042
Hello,

As said, there are two pairs of contacts.
Have a look at the following picture:

switch_connections.png

Bertus
 

Thread Starter

jacobd12

Joined Jan 27, 2016
3
Thank you everybody! I had orentated the switches the wrong way and was shorting out my whole circuit,just yad to flip them all round in the side.
Thanks again!
 
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