OT: Shop assistant didn't know what "half a dozen"meant!

Started by Cursitor Doom in sci.electronics.design3 hours ago 14 replies

Is this a "satisfactory outcome" of state schooling?? https://tinyurl.com/y3f746zs No wonder Socialist politicians and Conservatives...

Is this a "satisfactory outcome" of state schooling?? https://tinyurl.com/y3f746zs No wonder Socialist politicians and Conservatives alike send their precious offspring to private schools! -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is condit...


running LEDs to the max, 200A

Started by Winfield Hill in sci.electronics.design3 hours ago 8 replies

We're using a blue OSRAM projection LED, for fluorescence neural imaging. Rated for 20W of light with 20A of current drive, and with ...

We're using a blue OSRAM projection LED, for fluorescence neural imaging. Rated for 20W of light with 20A of current drive, and with spec'd 30A pulse, and 40A surge for 10us, we drive it with 200A for 45us to get our needed photons (each $30 LED lasts about 2 months). Straight-forward 200A current-source-drive circuit, AoE x-Chapter writeup, read it here: https://www.dropbox.co...


MOSFETs with gate-drive specs below 1.8 volts

Started by Winfield Hill in sci.electronics.design3 hours ago 32 replies

Hello y'all, Have any of you run across any power MOSFET types with gate-drive specs below 1.8 volts? -- Thanks, - Win

Hello y'all, Have any of you run across any power MOSFET types with gate-drive specs below 1.8 volts? -- Thanks, - Win


A Donald Trump question

Started by david eather in sci.electronics.design3 hours ago 217 replies

Actually it is just a question. Does anyone know why of evangelical Christians are drawn to / support Donald Trump. I don't want an argument...

Actually it is just a question. Does anyone know why of evangelical Christians are drawn to / support Donald Trump. I don't want an argument I just want to know. TIA


737 Max

Started by bitrex in sci.electronics.design4 hours ago 260 replies

The 737 Max has been grounded in a variety of countries including the UK, Ireland, Germany, China, Iceland: As for the US Donald Trump...

The 737 Max has been grounded in a variety of countries including the UK, Ireland, Germany, China, Iceland: As for the US Donald Trump has tweeted his official findings on the cause and I assume the investigation is now closed, and business may continue as usual. but please feel free to use this thread f


whiteboard lights

Started by John Larkin in sci.electronics.design5 hours ago 31 replies

I use my whiteboard a lot. This one has a fadeout grid and a very glossy, reflective surface. So I got a couple of cheap Amazon LED...

I use my whiteboard a lot. This one has a fadeout grid and a very glossy, reflective surface. So I got a couple of cheap Amazon LED yard lights and a 12 volt wart and set up some proper illumination. https://www.dropbox.com/s/ksywuv0uzg9ct5t/DSC03258.JPG?dl=0 If I stand in just the right place, I can take nice whiteboard pics with good uniform illumination and no glare. -- ...


historical electric lighting

Started by John Larkin in sci.electronics.design6 hours ago 1 reply

https://www.theregister.co.uk/2019/03/18/geeks_guide_to_britain_cragside/ -- John Larkin Highland Technology,...

https://www.theregister.co.uk/2019/03/18/geeks_guide_to_britain_cragside/ -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


This is the year I'm supposed to sign up for Medicare, TIPS?

Started by amdx in sci.electronics.design10 hours ago 60 replies

Just turned 64 yrs old, I will be signing up for medicare near the end of the year. Do you more mature folks have any tips, things you have...

Just turned 64 yrs old, I will be signing up for medicare near the end of the year. Do you more mature folks have any tips, things you have learned by mistake? I want to put together a list of tips so when I sign up, I have a clue as to what I'm doing and why. Mikek btw, If reading this and complain it is OT, the subject line is clear, why did you...


Favourite references of analog electronics

Started by Jeroen Belleman in sci.electronics.design10 hours ago 52 replies

Except for AoE, which everyone knows and loves, what are your favourite references for analog electronics? I like 'Analog Circuit Design, Art,...

Except for AoE, which everyone knows and loves, what are your favourite references for analog electronics? I like 'Analog Circuit Design, Art, Science and Personalities' from J. Williams as well, but I feel it's a bit whimsical. The radlab series are good, but rather dated. Any others? Jeroen Belleman


Canon Bubble-jet printers

Started by Robert Baer in sci.electronics.design11 hours ago 39 replies

I am interested in obtaining a working Canon BJC printer, series 4000 preferred. Please contact me if you can help. Thanks. R. Baer

I am interested in obtaining a working Canon BJC printer, series 4000 preferred. Please contact me if you can help. Thanks. R. Baer


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