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Author Topic: Using calculator display for arduino.  (Read 2518 times)
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Ufoguy
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« on: November 13, 2011, 08:36:47 pm »
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Calculators are available cheaply for around a dollar. Can I use it's display with arduino. If yes how?
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johnwasser
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« Reply #1 on: November 14, 2011, 09:50:06 am »
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See application note AVR241 from Atmel: "Direct driving of LCD display using general IO":

http://atmel.com/dyn/resources/prod_documents/doc2569.pdf
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robtillaart
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In theory there is no difference between theory and practice, however in practice there are many...
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« Reply #2 on: November 14, 2011, 12:10:58 pm »
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Or you can connect the buttons on the calculator to IO pins or relays or so to contol the device ... (nice project for a school)
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Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -

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I don't think you connected the grounds, Dave.
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« Reply #3 on: November 14, 2011, 12:44:22 pm »
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Some of the interconnects on these cheap devices can be very hard to hack. You may find with the number you will wreck, it would be cheaper overall to buy a display.
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