Electronics Design

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Global Pandemic Status Report

These are 15-30 minute daily summaries by a real MD, usually covering disease spread, vaccine and treatment efficacy wo...
5 comments posted 5yrs
posted by bloggs.fredbloggs.fred
5 comments posted 5yrs posted by bloggs.fredbloggs.fred

Optimize a TCRT5000L

I am using a TCRT5000L photo-interrupter to drive the input of a bank of 74LS90 decade counters to make a rotation coun...
21 comments posted 5yrs
posted by rhor...
21 comments posted 5yrs posted by rhor...

THE THRUTH ABOUT EVOLUTION AND THE CORONA VIRUS

I WANT YOU THINK ABOUT TWO SCENERIOS/CASES: TWO SCENERIOS: 1. SEVEN BILLION PEOPLE ARE ALL IN ONE ROOM AND 1 PATIENT ZE...
9 comments posted 5yrs
posted by skybuck2000
9 comments posted 5yrs posted by skybuck2000

Amorphous metal tape

I need to make an inductor - a couple of mH at a couple of amps. It has to fit in an awkward space, roughly oval toroid...
11 comments posted 5yrs
posted by clive
11 comments posted 5yrs posted by clive

Steering a magnet with a coil.

I've constructed a rotating valve. It contains a magnet. I can rotate the magnet from outside the pipe where the valve...
6 comments posted 5yrs
posted by albert
6 comments posted 5yrs posted by albert

ot about science

https://justthenews.com/politics-policy/coronavirus/mit-researchers-praise-anti-mask-advocates-while-comparing-them-jan...
10 comments posted 5yrs
posted by jlarkin
10 comments posted 5yrs posted by jlarkin

OT - Sang-froid

https://www.youtube.com/watch?v=f02rFjsZrB8
9 comments posted 5yrs
posted by clive
9 comments posted 5yrs posted by clive

Laser Cube

Some Swiss-army laser-projector box, 2.5 watts. At 2 grand it isn't cheap but in the 90s a setup like this for e.g. pla...
3 comments posted 5yrs
posted by user
3 comments posted 5yrs posted by user

Solar panel example for LT-Spice?

I'm working on a TP4056-based 1S LIPO solar charger which includes a load sharing (aka power path) function. But I don'...
7 comments posted 5yrs
posted by waybackNO584SPAM44
7 comments posted 5yrs posted by waybackNO584SPAM44

Just checking in

I am still waiting for cataract surgery, and I'm stil dealing with weekly trips to wound care. I have to sit eight inch...
38 comments posted 5yrs
posted by terrell.michael.a
38 comments posted 5yrs posted by terrell.michael.a

OT: iron spam!

If true, this would actually be pretty clever! (stumbled upon while looking for something completely different!)
13 comments posted 5yrs
posted by blockedofcourse
13 comments posted 5yrs posted by blockedofcourse

fast pulse on ribbon cable

I want to send a fast trigger pulse a short distance inside a rackmount enclosure, a foot or two between boards. Signal...
22 comments posted 5yrs
posted by jlarkin
22 comments posted 5yrs posted by jlarkin