Mailbag 65 - Coolest Episode Yet!

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Blue 0805 LEDs:

Binding Posts:

CPU Cooler:

Cooling block:

8x10 cooling hose:

Electronic load:

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Looking forward to the fridge experiment.

frankowalker
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You seem like the teacher I would have loved to have, back when I went to school

Batmule
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That dummy load is way more impressive than mine. haha. I did just test a 20, 000 mah battery bank with mine that came back around 5, 000.

AnotherMaker
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Try the “Ice Blue” SMD LEDs. So nice! Good luck for the new year of teaching. Here in the Southern Hemisphere, we’re about 3/4 the way through. Stay safe! 👍

onecircuit-as
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Just use 2 fans and 2 heat sinks if you want to build a fridge or cooler otherwise you will require anti freeze, a pump and some type of thermostat. If you look at the ready made coolers like Mobicool and Coolatron they use a fan and heat sink on the hot side and a slightly smaller fan and heat sink on the cold side. Your idea is good for the high powered LED but far to complex for a simple fridge.

jefftremblay
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Modern Blue LEDs are my fav. Efficient.
You can often get them to glow with a tiny fraction of a milliamp.
5V with a 4.7k resistor usually works.

GnuReligion
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Where do you get your small boxes for smd components from?

thomasbertram