Curious Mark does some great videos. My dad worked at Grumman on the Apollo lunar module, so it's a favorite topic of mine. He was a "thermal engineer" (even though his background was chemical engineering) so he was responsible for calculating the heat output of all of the devices/wiring to determine how much radiative cooling was needed in different circumstances. Rich -- Rich Cini http://cini.classiccmp.org http://altair32.classiccmp.org <http://www.classiccmp.org/altair32> On 7/30/21, 4:18 AM, "vcf-midatlantic on behalf of Jeffrey Jonas via vcf-midatlantic" <vcf-midatlantic-bounces@lists.vcfed.org on behalf of vcf-midatlantic@lists.vcfed.org> wrote: Curious Mark does it again: not only obtains genuine Apollo computer electro-luminescent panels but lights them up using the original relays! The relay logic is amazing: 5 relays generate 7 segment output including blanking! One hitch: a "Chinese-ium" Copper-Cladded-Aluminum jumper failed. Add that to the recent influx of faulty breadboards and it's a world of hurt for prototyping :-( https://youtu.be/feRCZyLzAwA Apollo DSKY panel relight: the full story -- jeff jonas