Electronics Design

B-size schematics

There are some nice B-size printers, but the best part is that old B-size schematics make perfect placemats for lunch. J...

10 comments posted 3mos

posted by jl

10 comments posted 3mos posted by jl

Server power

I was thinking of using one of these https://www.princessauto.com/en/2-10-50a-fully-automatic-battery-charger-with-engi...

10 comments posted 3mos

posted by invalid

10 comments posted 3mos posted by invalid

Dead Internet Theory Is 17% of the Way to Becoming Reality, Study Finds

"The study is based on data collected by the Internet Archive’s Wayback Machine from late 2022 (when ChatGPT kicked off...

0 comments posted 3mos

posted by someone

0 comments posted 3mos posted by someone

Design challenge

I was joking in alt.politcs.trump about a trump-blocker for TVs Like you have ad blockers in your browser. I came up wi...

64 comments posted 3mos

posted by alien

64 comments posted 3mos posted by alien

Sudents build a cosmic radio to listen for dark matter

From: https://www.sciencedaily.com/releases/2026/04/260427050618.htm Students build a “cosmic radio” to listen for dark...

30 comments posted 3mos

posted by alien

30 comments posted 3mos posted by alien

density

Once I thought that 2 parts per square inch was dense. This is 20. https://www.dropbox.com/scl/fi/3b88j1bvm4t4i7ktq4sti...

7 comments posted 3mos

posted by jl

7 comments posted 3mos posted by jl

Bedside fonts (typefaces)

I've been designing a replacement "personal HiFi" for SWMBO as hers (both of them) are 30+ years old and I am tired of...

0 comments posted 3mos

posted by blockedofcourse

0 comments posted 3mos posted by blockedofcourse

Barcode/QRcode scanning on phones

Ages ago (~15+ years?), I designed a "donation tracking system" for a nonprofit. It allowed donor, type of donation (al...

14 comments posted 3mos

posted by blockedofcourse

14 comments posted 3mos posted by blockedofcourse

about electronics

I went to a couple of hardware meetups and pitch sessions this week. And I interview job and intern applicants. And I s...

76 comments posted 3mos

posted by jl

76 comments posted 3mos posted by jl

hand-held DVMs and rechargeable lithium 9V or 1.5V cells

One of the characteristics if the rechargeable 1.5 and 9V lithium cells is that they don't present a limiting voltage f...

16 comments posted 3mos

posted by legg

16 comments posted 3mos posted by legg

tiny 1200v SiC diode

Here's a new part. It's a 1200 volt silicon carbide diode in an SMA package. 228-1041 DIO SCH PWR 1200V SMA SIC SI02C12...

44 comments posted 3mos

posted by jl

44 comments posted 3mos posted by jl

DIY RAM

https://www.theregister.com/2026/04/23/youtuber_builds_working_dram/

5 comments posted 3mos

posted by invalid

5 comments posted 3mos posted by invalid

thermal resistance, dummy loads

Hi, I'm wondering what could be used as a dummy load for testing low voltage, high wattage DC power supplies. E.g., I h...

12 comments posted 3mos

posted by christopher

12 comments posted 3mos posted by christopher

Re: Fwd: Re: Meta: a usenet server just for sci.math (AATU)

> On Thu, 23 Apr 2026 09:39:31 -0700, Ross Finlayson > snipped-for-privacy@gmail.com wrote: > > > a 4000-line post! > >...

0 comments posted 3mos

posted by ross.a.finlayson

0 comments posted 3mos posted by ross.a.finlayson

spacesuits

https://www.theregister.com/2026/04/21/nasa_oig_spacesuit_report/ Sould like it will cost a lot more than $3B. John Lark...

8 comments posted 3mos

posted by jl

8 comments posted 3mos posted by jl