09-15-2011 04:32 PM - edited 09-15-2011 04:34 PM
(** This is with the current trial version, ** )
Hello, I'm trying to use any of the keypads in a "non-MCU" circuit
I.e. I copied the keypad, the Vcc and the ground from the samples Calculator project to a new circuit.
I added probes to each output line of the keypad, and ran the simulation.
Activating any of the buttons does not activate any of the probes.
I created another circuit and added AND gates connected to each keypad output and Vcc, still no output on the probes.
Do the keypads only work with an MCU ?
Mike
09-21-2011 09:32 AM
Hi Mike,
Here is a drawing for the 4x4 keypad. The attached Mutlisim file, press the number 7 and the LED should turn on.
09-21-2011 01:26 PM
Hi Tien,
I can't open your file, as I mentioned, I'm using the 10.1.1 version of the demo,... only downloaded it ~9 days ago, amazing that ver 11 is already out 😉
Anyway, I figured it out before your post, that I needed to have power applied to a row / or column before pressing a key on the column / row 😉
Mike