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Re: Operating temperatures

> Having to deal with formally specifying operating temperatures > of my devices, I've started canvassing other product...
6 comments posted 11mos
posted by newspam'''
6 comments posted 11mos posted by newspam'''

50 cent DDS synthesizer

We have a little proto board with a RP2040 Rpi cpu and an Efinix T20 FPGA. The Pi configures the FPGA at powerup and th...
17 comments posted 11mos
posted by jl
17 comments posted 11mos posted by jl

RF power combiner

While musing over a text about transmission line transformers, combiners, splitters and so on, I came up with a power c...
11 comments posted 11mos
posted by jeroen
11 comments posted 11mos posted by jeroen

cheap testing

We're testing a proto board. I'm temperature compensating a 50 MHz LC oscillator. The beer cooler is a great benchtop t...
7 comments posted 11mos
posted by jl
7 comments posted 11mos posted by jl

Re: HVAC control interfaces

> Legacy HVAC controls (what the industry calls "24 volt") are relatively > trivial -- battery is provided to some numb...
2 comments posted 11mos
posted by usenet
2 comments posted 11mos posted by usenet

kinda fast logic

https://adsantec.com/ John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics
4 comments posted 11mos
posted by jl
4 comments posted 11mos posted by jl

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 11mos
posted by user
4 comments posted 11mos 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 11mos
posted by jl
9 comments posted 11mos 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 11mos
posted by buzz_mccool
3 comments posted 11mos 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 11mos
posted by newspam'''
37 comments posted 11mos 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 11mos
posted by jl
7 comments posted 11mos 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 11mos
posted by coulon
55 comments posted 11mos 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 11mos
posted by jl
31 comments posted 11mos 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 11mos
posted by invalid
23 comments posted 11mos 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 11mos
posted by jl
5 comments posted 11mos posted by jl