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Post AX5lMOnf2AM3i3R5ge by [email protected] |
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More posts by [email protected] |
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Post #AX5kCD87T59ufKaE9Q by [email protected] |
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argh why am I getting ghosting on a 3x3 keypad which has diodes on all the swit… |
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Post #AX5kPASmh5ok9xQZLU by [email protected] |
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like this is a pretty textbook dioded keyboard matrix |
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Post #AX5kV2RHROtf0hWVXM by [email protected] |
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but if I press 7 and 5 together, I get 4 as well. |
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Post #AX5lMOnf2AM3i3R5ge by [email protected] |
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@foone do you have any pull-ups or pull-downs on the inputs? |
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Post #AX5lMOsGl22bwLals0 by [email protected] |
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@slaeshjag yeah the code I'm using enables the internal pull-ups of the tee… |
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Post #AX5lX5TNET4Ox82kc4 by [email protected] |
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@foone how are the row and column lines hooked up? any pullups/pulldowns? |
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Post #AX5lX5XcyeTNAK29FA by [email protected] |
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@gsuberland the code I'm using enables the internal pull-ups of the teensy:… |
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Post #AX5ljWgTt2fYp36baK by [email protected] |
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@foone scanning too fast? Flipped diode? |
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Post #AX5ljWkjdE4X2F60DQ by [email protected] |
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@ckape that's what I thought. slowing it down seemed to help, but caused ot… |
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Post #AX5lqVSyoS9P4Z7R9k by [email protected] |
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putting in a 5ms column scanning delay seemingly fixes it. I'm guessing it&… |
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Post #AX5m8p9QMfV1KshrOK by [email protected] |
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also the best part of this project is that I have to remember to take my keyboa… |
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Post #AX5m8s39aRGYKInOXA by [email protected] |
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hmm, even a 1ms delay is enough. weird. okay though |
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Post #AX5mrs9K3zyBfN8iUy by [email protected] |
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@foone possibly related to the INPUT_PULLUP emulation in Keypad.h? |
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Post #AX5mrsDZoBN9sZ8784 by [email protected] |
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@gsuberland I don't think so. This is an ARM chip and I think it has built … |
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Post #AX7oleYYHHWdzl1S2C by [email protected] |
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@foone What diode type? 1N4148 good, 1N400x bad - have too much capacitance, do… |
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Post #AX7oleco1SvcCx0qfI by [email protected] |
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@benbradley they should be 1N4148, yeah. |
