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arduino switching

Former Member over 13 years ago

Seems easy / can it be done ? want to input 64 momentry switches to toggle latch 64 outputs...any help appreciated

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Former Member over 13 years ago

As long as you have enough 74HC595s to Shift Out and enough CD4021BEs to Shift In with then yes.
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Former Member over 13 years ago in reply to Former Member

Would that be 8 of each ??? ............do you know if the arduino will interface with the 82C55 PIO chip by intercil
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Former Member over 13 years ago in reply to Former Member

Yes 8 of each will give you 64 inputs and 64 outputs while only using 6 pin on the arduino.

From what I can tell the 82C55 is a programmable interface chip. If you know how to use it then you can certainly use an Arduino to control it and its 24 i/o pins but you'll need to program the chip as well as the Arduino to control things. But I wouldn't know where to begin in wiring it to the arduino.
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Former Member over 13 years ago in reply to Former Member

Ok back to the 74 chips...Im ok with analog but dire with digital so excuse me !!

Can I setup ,say, 20 memory stores where combinations of the switches can be saved and re-called.
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Former Member over 13 years ago in reply to Former Member

Ok back to the 74 chips...Im ok with analog but dire with digital so excuse me !!

Can I setup ,say, 20 memory stores where combinations of the switches can be saved and re-called.
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Former Member over 13 years ago in reply to Former Member

Thats doable. Its all in how you program the Arduino.
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Nate1616 over 13 years ago in reply to Former Member

yes the 82C55 PIO should work with the arduino. as for the memory stores that should also work. ive attached and image that should help you with the wiring
hope this helps
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Former Member over 13 years ago in reply to Former Member

Hello Michael

Have basically set this up using shift in and out but don't know how to code this...are there any examples ? the input switch is required to latch the output toggling it on or off..thanks in advance

Olech
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