Electronics Design

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Idea for a simple -1.5V 20mA power supply?

As asked in the header, does anybody have an idea for simply generating a low negative voltage for indicator leds on lo...
28 comments posted 3yrs
posted by mr
28 comments posted 3yrs posted by mr

Shared Communications Bus - RS-422 or RS-485

I have a test fixture that uses RS-232 to communicate with a PC. It actually uses the voltage levels of RS-232, even th...
88 comments posted 3yrs
posted by gnuarm.deletethisbit
88 comments posted 3yrs posted by gnuarm.deletethisbit

pcb layout?

https://video-images.vice.com/articles/635ad0f9c5759a009aac7be8/lede/1666896451777-gettyimages-1202271610.jpeg?crop=1xw...
8 comments posted 3yrs
posted by jlarkin
8 comments posted 3yrs posted by jlarkin

Low power (<3W) 230VAC to 24VDC converter?

Looking for something that solders into a PCB like the ubiquitous cheap DC/DC modules, but AC to DC with galvanic insula...
14 comments posted 3yrs
posted by boblatest
14 comments posted 3yrs posted by boblatest

More on retina and vision

https://www.sciencedaily.com/releases/2022/10/221027123919.htmhttps://www.rockefeller.edu/news/33135-fruit-flies-move-t...
33 comments posted 3yrs
posted by pNaonStpealmtje
33 comments posted 3yrs posted by pNaonStpealmtje

threaded hollow rod - banana plug female coupler

A while ago someone was looking for a source of hollow threaded rod. One source suggested was recycling a presta valve...
10 comments posted 3yrs
posted by legg
10 comments posted 3yrs posted by legg

The next wonder semiconductor?

With scanning ultrafast electron microscopy, researchers unveil promising hot photocarrier transport properties of cubic...
0 comments posted 3yrs
posted by pNaonStpealmtje
0 comments posted 3yrs posted by pNaonStpealmtje

favorite Spice speedups

We have some sims that run absurdly slow. What are your favorite speedups? In LT spice, I have arbitrarily done .opt re...
42 comments posted 3yrs
posted by jlarkin
42 comments posted 3yrs posted by jlarkin