Electronics Design

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fireworks

https://www.youtube.com/watch?v=tIvdcdogC6k -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lo...
12 comments posted 6yrs
posted by jjlarkin
12 comments posted 6yrs posted by jjlarkin

A better approach to desing may be teachable.

The latest Proceedings of the (US) National Academy of Sciences has a paper that is probably on-topic in a design group...
48 comments posted 6yrs
posted by bill.sloman
48 comments posted 6yrs posted by bill.sloman

boasting

wasn't there a kinda whitish guy who boasted that there wouldn't be 10 thousand new covid19 every day? How wrong does he...
12 comments posted 6yrs
posted by eathDELETEer
12 comments posted 6yrs posted by eathDELETEer

Long-lasting battery

This website: http://www.tadiranbat.com/ boldly claims "THE ONLY LITHIUM BATTERIES PROVEN TO LAST 40 YEARS" But when I...
34 comments posted 6yrs
posted by peter.pan
34 comments posted 6yrs posted by peter.pan

Those scientists lied again

Hydroxycloriquone works after all. And all our resident "men of reason" here on s.e.d. are FOS. But very scientifically...
4 comments posted 6yrs
posted by bulegoge
4 comments posted 6yrs posted by bulegoge

has google gone nuts?

On the google.com page, there if a little menu box upper-right, that used to have a link to MAPS. Now clicking that box...
33 comments posted 6yrs
posted by jjlarkin
33 comments posted 6yrs posted by jjlarkin

discrete JFETs vs CMOS analog switch

I need a switchable 0 /40dB attenuator for a 10Hz-20MHz 1Vp-p signal into a buffer amplifier (10k|3pF input loading). F...
29 comments posted 6yrs
posted by adam.seychell
29 comments posted 6yrs posted by adam.seychell

Kind of on topic - - Remove magnet from speaker

I saw this in a dumpster and was impressed by it's 1000 watt rating and it's strong magnet. https://imgur.com/a/P6cmILW...
11 comments posted 6yrs
posted by scientist77017
11 comments posted 6yrs posted by scientist77017

DC power filter

We sometimes have a "quiet" power pour on a pc board, like +3.3Q. Ideally is has its own LDO from +5 or something. But...
4 comments posted 6yrs
posted by jlarkin
4 comments posted 6yrs posted by jlarkin

Isolated 12 -> ~25

I need two isolated rails, +25 and -25 from 12 volts at about 4-5 watts output per. Mean well makes a few one-output po...
7 comments posted 6yrs
posted by user
7 comments posted 6yrs posted by user

dual neg switcher

I'm on my 3rd day of BOM minimization of my big timing board, trying to consolidate enough parts so we can load the pic...
0 comments posted 6yrs
posted by jlarkin
0 comments posted 6yrs posted by jlarkin