[time-nuts] Rb video

[Mark Sims]

I also use a blinking status LED controlled by an ATTINY13 AVR chip.  It also reads a temperature sensor and controls a PWM'ed fan.  The LED blinks out the temperature.
BTW,  the guy made a lot of bad decisions in his build.  FOr instance,  he should have brought out the Rb frequency/PPS signals to BNC connectors and patched them externally into the input BNC's.  That way he could use any unused amplifier channels for other things.
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If you want to get fancy, you can run a speed controlled fan on the heat sink to regulate the temperature. You still want to pick a temp that's as low as you can practically get it for your control point.