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keypads in MultiSim 10.1.372 - no MCU

(** 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

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Hi Mike,

 

Here is a drawing for the 4x4 keypad. The attached Mutlisim  file, press the number 7 and the LED should turn on.

serkey16.gif

Tien P.

National Instruments
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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

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