Hi,

I thought it might be of interest to share  the components temperature (Celsius)  that I measured with a small IR thermometer. I bought this after I burnt my finger testing some 74161 ;-)

Apple-1 Temperature tests.jpg

Apple-1 Temperatures Tests.xlsx

There’s been a couple of times when I was about to pull a card out of an Apple II and noticed that the power was still on. With the IIe it’s pretty obvious but while there is a power light on the IIgs, it just doesn’t stand out. A while back for a project I bought a batch of LEDs on wires with a resistor in line and the connections covered in shrink wrap.

I just soldered the wires to 5v and stuck the LED in a vent hole. It wasn’t the tightest fit so I added a tab of silicon. If it should somehow come loose, there’s no bare wire on it.

Power Supply light.jpg

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