Into the mix, [Scott-28] added a seven-segment LED display to show the current time, a couple of LEDs to indicate if the digits are hours, minutes, or seconds, and a button to kick the whole thing ...

[Hlesliebole] wired a 7-segment display to show the current time delay between photos. This can be set on the fly with a potentiometer, so there’s no need to stop and reprogram the Arduino.