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| automatic numeric display/countup & hold |
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| bimm25e:
I want to add a 2 digit numeric display in my BTTF cabinet that starts at 1, counts up to 88 quickly and then holds at 88 for 3 seconds before turning off. I want this to be triggered when the ball is moved OFF of the ball launch tray switch. any advice? I don't know where to even start. |
| Slippyblade:
Would be a simple thing to do with an Arduino or AVR. Though I'm not sure what you mean by moving the ball. Got a link, pics, or an explanation? |
| PL1:
Slippy: BTTF is a pin -- IPDB listing here. You can see the slot for the switch Bimm25e referred to in the lower right corner. Bimm25e: Manual with schematic is here. Have you found the switch in the schematic? (Is it SW14 on pg 46?) Scott |
| Slippyblade:
Got it, now the statement makes sense. Then yeah, a generic AVR would do what he needs just fine. One line setup as an input to detect the ball switch. When the switch is fired it just starts a count-up loop from 0 to 88 and holds at 88 for the 3 second timer. Output would depend on the type of LED setup he has. Wouldn't be that hard. |
| PL1:
The difficulty is that it is wired to a matrix encoder. If an AVR input can monitor the voltage at the switch without causing problems with the matrix encoder, he can probably make it work. Not sure what voltages are present at the switch tabs during the press/release process. :dunno Scott |
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