Electronics Design

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AC coupling caps

Typically, an AC coupling cap is driven from a low impedance source and only the load needs to be factored into the fre...
45 comments posted 3yrs
posted by gnuarm.deletethisbit
45 comments posted 3yrs posted by gnuarm.deletethisbit

OT. Michelin Snow Tire Recall

In the off chance that someone here has snow tires: It's good old fashioned common sense in my world that vehicles slide...
6 comments posted 3yrs
posted by deanh6929
6 comments posted 3yrs posted by deanh6929

DVM measuring volts and amps

I wonder if this works: https://www.dropbox.com/s/dz1k4d46fwxj8b5/DVM_E_I.jpg?raw=1 the idea being to just ask the DVM...
19 comments posted 3yrs
posted by jlarkin
19 comments posted 3yrs posted by jlarkin

LED in hermetic envelope?

I'm noticing dollar store 120V LED lamps in hermetic glass bulbs. Emitter assemblies are the yellow stick variety (two...
21 comments posted 3yrs
posted by legg
21 comments posted 3yrs posted by legg

Good day for the lil guy (hardware design)

Some libs are annoyed that Dominion "sold out" by settling with Fox, that's dumb. They're not regulators and they speak...
13 comments posted 3yrs
posted by user
13 comments posted 3yrs posted by user

Digikey degrading

A recent Digikey parts search, sorted by price, starts with thousands of "marketplace" products priced at 0.01 and not...
10 comments posted 3yrs
posted by jlarkin
10 comments posted 3yrs posted by jlarkin

Two transistors, same number, different sizes?

I have a 500W switched mode power supply and a pair of J13009 transistors have failed. I mistakenly thought a J13009 wa...
4 comments posted 3yrs
posted by CK1
4 comments posted 3yrs posted by CK1

The Very Fast Plane Company, Inc.

And other such company names. Latest example: we've been buying nice shiny laser-engraved boxes from shinyenclosure.com...
1 comments posted 3yrs
posted by pcdhSpamMeSenseless
1 comments posted 3yrs posted by pcdhSpamMeSenseless

Re: OT? Germany Shutting Down Nuke Plants

> > >> >> > >So, you mean lots of governments? > > In the USA, we have state governments, and people are free to move >...
10 comments posted 3yrs
posted by bill.sloman
10 comments posted 3yrs posted by bill.sloman

triggering things with ethernet

Suppose one were to send a broadcast packet from a PC to multiple boxes over regular 100 Mbit ethernet, without any fan...
48 comments posted 3yrs
posted by jlarkin
48 comments posted 3yrs posted by jlarkin

Bald Eagles per Jelly Doughnut

I often get frustrated when having to do calcuations that involve imperial units, especially anything to do with specif...
7 comments posted 3yrs
posted by gnuarm.deletethisbit
7 comments posted 3yrs posted by gnuarm.deletethisbit

disincentive to conserve

https://ktla.com/news/local-news/california-power-companies-roll-out-fixed-rate-bill-proposal/ Poor people could sell p...
8 comments posted 3yrs
posted by jjlarkin
8 comments posted 3yrs posted by jjlarkin

Only one EV charger at home?!

https://www.smarthomecharge.co.uk/features/do-you-need-two-home-charge-points-if-you-have-two-evs/ "Some products will...
879 comments posted 3yrs
posted by CK1
879 comments posted 3yrs posted by CK1

Reducing voltage of laptop power supply

I have a Toshiba 3.4A, 19V laptop power supply that I want to reduce to 12V. Is it as simple as finding a 19V zener and...
20 comments posted 3yrs
posted by amdx62
20 comments posted 3yrs posted by amdx62