FP BOM updated. The website with the Custom Key caps deleted the link to order more keycaps. I just send an email to put it back and to send me the new links. As it has been a while, perhaps they deleted as no orders has been placed since them.
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I’ve had good luck just ordering off eBay. As long as it’s .56” common cathode. Looks like it’s been a while since I bought any of these but last I did I think I paid $8.50 for 10 units. I must admit I’ve never checked the power specs, but then again have never had any problems…. Perhaps something like this?:
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Pretty sure these “Ele-parts” ones are what I bought some time ago. FYI I did not change any of the resistor values and haven’t had any issues… so I’ve had good luck.
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Each digit on each .56” common cathode is only “on” for about 1.5ms, so there is no need to change any resistor value. If the circuit that controls the 1.5ms pulse fails, the LED display will be very bright and it might damaged the LED display “only” when booting HDOS or CP/M as they do not clear the FP display because they rely on the 1.5ms circuit to do its job.
If you want to control the LED brightness, then you will need to change the 1.5ms pulse to 0.9ms or something similar.
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