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7x20mm relay tests

I'm going use an insane number of 7x20mm SPST relays, so I'm testing relays and drivers. Here's a start. https://www.dr...
5 comments posted 3yrs
posted by jjlarkin
5 comments posted 3yrs posted by jjlarkin

EV charging on GFCI

I am using the portable charger on friend's house, but it's tripping the GFCI circuit. How is that possible if the vehi...
72 comments posted 3yrs
posted by eddy711lee
72 comments posted 3yrs posted by eddy711lee

2023 Released Goldshell KD BOX II 5TH/s 400W Asic

Buy Goldshell KD BOX Ⅱ https://cryptodigitalskills.com/product/goldshell-kd-box-%e2%85%b1/Model KD-BOX 2 from Goldshell...
0 comments posted 3yrs
posted by cryptodigitalskills
0 comments posted 3yrs posted by cryptodigitalskills

lunar contradictions

https://www.msn.com/en-us/news/technology/the-moon-is-open-for-business-and-entrepreneurs-are-racing-to-make-billions/a...
22 comments posted 3yrs
posted by invalid_unparseable
22 comments posted 3yrs posted by invalid_unparseable

drum core polarity

Unshielded drum cores are cheap and have lots of L*I^2 for their size. But they leak mag fields. Maybe I can put two si...
10 comments posted 3yrs
posted by invalid_unparseable
10 comments posted 3yrs posted by invalid_unparseable

Controlled Resistor emulator / process meter

Hi I need to fool a heat pump into controlling the output temperature. Normally the heat pump is controlled with an ext...
17 comments posted 3yrs
posted by klaus.kragelund
17 comments posted 3yrs posted by klaus.kragelund

Bob Parker's Blue ESR Meter - query

Apart from capacitor ESR checking, I use this meter for checking and tracking battery ESRs. Can anyone give me a safe u...
3 comments posted 3yrs
posted by charlie
3 comments posted 3yrs posted by charlie

addon functions

Lewin Edwards in his dosfs file system uses the ldiv() functions shown below: sector = ldiv(offset, SECTOR_SIZE).quot a...
1 comments posted 3yrs
posted by ht
1 comments posted 3yrs posted by ht

LT Spice exporting a waveform

Imagine a 14-bit ripple counter driving an R-2R DAC, to make a stairstep waveform. I can clean up the glitches with a s...
2 comments posted 3yrs
posted by jlarkin
2 comments posted 3yrs posted by jlarkin

How is IEEE 802.11 bb different from IrDA ?

Very recently, IEEE released the standards for the IEEE 802.11bb, for line-of-sight, secure communications between devi...
3 comments posted 3yrs
posted by dakupoto
3 comments posted 3yrs posted by dakupoto

Ambient Temperature and Pressure Superconductor

I'm surprised no one else has mentioned this here. https://qcentre.co.kr/home This web site is often down from the high...
17 comments posted 3yrs
posted by gnuarm.deletethisbit
17 comments posted 3yrs posted by gnuarm.deletethisbit

Best flux remover yet: brake cleaner

Hi, all, Just wanted to pass along a new (to me) discovery. You know how when you try removing rosin flux with "flux re...
36 comments posted 3yrs
posted by pcdhSpamMeSenseless
36 comments posted 3yrs posted by pcdhSpamMeSenseless

"Mr. Static" ESD articles

https://incompliancemag.com/topics/magazine/columns/mr-static/ Interesting articles on ESD brought to mind by another t...
1 comments posted 3yrs
posted by nospam
1 comments posted 3yrs posted by nospam