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dektronics / printalyzer-timer

F-Stop enlarging timer and print exposure meter
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Remove button-embedded indicator LEDs from the buttons on the right side #46

Closed dkonigsberg closed 6 months ago

dkonigsberg commented 8 months ago

The cluster of buttons on the right side of the device (add-adjustment, test-strip, menu, and cancel) all currently have embedded indicator LEDs. The purpose of these LEDs was as a way of indicating device state, whereas all the other LEDs across the top panel are primarily for indicating button location when in a darkroom environment.

However, as development of the device as proceeded, two issues have come up against these supplemental LEDs:

  1. Indicator lights in these buttons don't directly correspond to any sort of obvious device state, and any state we would want to indicate does not obviously correlate to these buttons.
  2. The particular red LEDs in these buttons (chosen by the switch manufacturer) fail the paper-safety test with Foma B&W paper.

As such, we might as well get rid of them. In specific, this means replacing all the Marquardt 6425.3111 buttons on the device with the LED-free Marquardt 6425.0101 buttons used elsewhere.

It might make sense to add additional state indiciator LEDs, outside of buttons, elsewhere on the panel. However, a decision on that is still TBD.

dkonigsberg commented 6 months ago

Changed buttons and added suggested panel LEDs elsewhere.