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A vaguely useful circuit

You can sink a current to ground, and split it in two, one copy sinking from loads above ground and one copy sourcing t...
4 comments posted 9mos
posted by user
4 comments posted 9mos posted by user

remedial nerd

https://sfstandard.com/2025/10/17/slutcon-flirt-girls-tech-bros/ John Larkin Highland Tech Glen Canyon Design Center Lun...
9 comments posted 9mos
posted by jl
9 comments posted 9mos posted by jl

Modern Maico Mobil

>> I didn't renew the motorcycle part. I'm over that. It's chilly and dangerous. > Yes, had 2 motorcycles, stopped with...
3 comments posted 9mos
posted by buzz_mccool
3 comments posted 9mos posted by buzz_mccool

Re: 3D Printers

> I see lots of these at local auctions -- especially at the local > university.  Typically small units (18" cubes). >...
37 comments posted 9mos
posted by newspam'''
37 comments posted 9mos posted by newspam'''

what's wrong with this circuit?

https://www.edn.com/flip-on-flop-off-for-48-vdc-systems-with-high-side-switching/ John Larkin Highland Tech Glen Canyon...
7 comments posted 9mos
posted by jl
7 comments posted 9mos posted by jl

Phase detector with a MC1496

I am at 50 MHz with two about 500 mV pp signal. When my two signals have 90° phase shift, the DC average between output...
55 comments posted 9mos
posted by coulon
55 comments posted 9mos posted by coulon

Re: More semiconductor trouble coming?

On Tue, 14 Oct 2025 13:03:12 GMT, Jan Panteltje snipped-for-privacy@comet.invalid wrote: >In a reaction to the Dutch go...
31 comments posted 9mos
posted by jl
31 comments posted 9mos posted by jl

Re: "universal" power symbol

> *NOT* "power switch" but, rather, (electrical) "Power". Radiating light bulb? There are some here: https://www.google...
23 comments posted 9mos
posted by invalid
23 comments posted 9mos posted by invalid

JLCPCB copper

We did a big JLC order and inclued a bunch of 6" square pieces of double-side gold-plated 1oz copper FR4, for dremeling...
5 comments posted 9mos
posted by jl
5 comments posted 9mos posted by jl

Soft start for power supply

For Cursitor Doom A typical slow start circuit for tube equipment prevents or minimizes surges. It allows the tubes to...
8 comments posted 10mos
posted by ehsjr
8 comments posted 10mos posted by ehsjr

Henry Colpitts, cool guy

https://blog.minicircuits.com/outstanding-oip2-from-a-small-dual-mmic-amplifier/?_hsmi=384271201 John Larkin Highland Te...
1 comments posted 10mos
posted by jl
1 comments posted 10mos posted by jl

PSU Voltage Surges

Gentlemen, I've a couple of vintage HT power supplies which date from around 50 years ago; valve jobs. Anyway, the valv...
50 comments posted 10mos
posted by cd
50 comments posted 10mos posted by cd

Re: ping liz@poppyrecords

In article I was just reading in comp.os.linux.advocacy about this: > https://gwc.sourceforge.net/>did you know about t...
4 comments posted 10mos
posted by dplatt
4 comments posted 10mos posted by dplatt