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3x3 Keyboard for robot arm

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Yeshua

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Hello,

I need a 3x3 keyboard for control a robor arm...i dont know if can use the IC 74C922.

How I use it?

Any idea? Thank You
 

Moss

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First you must look at the manifacturte datasheet. In it you can find example of all nececery connections. If you need only 3x3 keys just miss the last column and last row.
 

algilsan

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Hello, if you find difficulties to get this chip, you always have the option of use a uController like PIC series 5xx, with only 8 pins.
 

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