OT: milestone, the x-Chapters

Started by Winfield Hill in sci.electronics.design1 hour ago 54 replies

Last night we handed over finished latex and eps files, for AoE The x-Chapters, to our long-suffering editor at CUP. Amazing stuff * went...

Last night we handed over finished latex and eps files, for AoE The x-Chapters, to our long-suffering editor at CUP. Amazing stuff * went in during the last 10 days, plus I get to make submissions and corrections for maybe three more weeks, while the files are being processed. The draft pdf version has over 650 pages. * Hundreds of explorations and explanations of exotic en...


FFT analyzer recommendations

Started by Phil Hobbs in sci.electronics.design2 hours ago 67 replies

Hi, all, I need another FFT analyzer. I really like my HP 35660A, but it only goes up to 100 kHz (50 kHz for two-channel measurements). I'd...

Hi, all, I need another FFT analyzer. I really like my HP 35660A, but it only goes up to 100 kHz (50 kHz for two-channel measurements). I'd really like one that goes up to at least 10 MHz, and can do the same sorts of stuff, especially display noise spectral density in different units on different scales and perform frequency response testing easily. There are a bunch of USB-style ...


Electric Cars Not Yet Viable

Started by Cursitor Doom in sci.electronics.design2 hours ago 136 replies

And if there is no quantum leap in battery technology, they may never be...

And if there is no quantum leap in battery technology, they may never be viable. https://www.zerohedge.com/news/2019-06-23/inconvenient-truth-electric-cars -- 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 conditional upon a charge of GBP10.00 pe...


what a horrible data sheet

Started by John Larkin in sci.electronics.design2 hours ago 12 replies

https://www.diodes.com/assets/Datasheets/PI6C59S6005.pdf Is the thermal pad ground? Figs 1 and 2 make no sense. Not a lot makes...

https://www.diodes.com/assets/Datasheets/PI6C59S6005.pdf Is the thermal pad ground? Figs 1 and 2 make no sense. Not a lot makes sense. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


Drone Attack

Started by Rick C in sci.electronics.design4 hours ago 73 replies

I read an article today with some details about Trump's decision to not attack Iran in retaliation for downing our drone. It said he was at the...

I read an article today with some details about Trump's decision to not attack Iran in retaliation for downing our drone. It said he was at the point of either saying attack or to stand down. Thankfully he stood down as many people felt a military response was not warranted and not proportional possibly leading to further hostilities. What worries me is, why did he let it go


New Raspberry Pi 4 presented today

Started by Jan Panteltje in sci.electronics.design5 hours ago 39 replies

New Raspberry Pi 4 quadcore presented today: https://www.raspberrypi.org/products/raspberry-pi-4-model-b/ USB3, gigabit ethernet, micro HDMI...

New Raspberry Pi 4 quadcore presented today: https://www.raspberrypi.org/products/raspberry-pi-4-model-b/ USB3, gigabit ethernet, micro HDMI dual display 4K, WiFi, bluetooth H264 and H265 hardware decode, 40 pin GPIO, 1, 2, or 4 GB RAM,. 5V 3 A supply. Only minus I see is that the power consumption goes up and up with each model, my old 1 core raspi only needs 300 mA :-(


Keypad to Wiegand Converter

Started by David Lesher in sci.electronics.design7 hours ago 1 reply

I'm seeking an existing matrix keypad to Wiengand converter board. (Building one in q10's is less attractive.) I found the MaCaPS one, anyone...

I'm seeking an existing matrix keypad to Wiengand converter board. (Building one in q10's is less attractive.) I found the MaCaPS one, anyone know of others? -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close.......................... Unless the host (that isn't close).........................pob 1433 is busy, hung or dead...


NPN protective zener

Started by Winfield Hill in sci.electronics.design7 hours ago 82 replies

NPN signal transistors make pretty good low-capacitance signal and MOSFET-gate protection zeners, etc. For example, the emitter-base...

NPN signal transistors make pretty good low-capacitance signal and MOSFET-gate protection zeners, etc. For example, the emitter-base junction of the common 2N3904 breaks down near 7.25 volts, and has 6 to 7pF of capacitance at 0V, drops to about 3.7pF at 5 volts. Has anybody taken pulsed high-current voltage-drop measurements on these guys? -- Thanks, - Win


Heatsink, just don't drop it on concrete

Started by Tim Williams in sci.electronics.design8 hours ago 69 replies

https://www.digikey.com/product-detail/en/ohmite/CA-TX1-050-E/CA-TX1-050-E-ND/9954358 Damn, didn't realize they were making full heatsinks out...

https://www.digikey.com/product-detail/en/ohmite/CA-TX1-050-E/CA-TX1-050-E-ND/9954358 Damn, didn't realize they were making full heatsinks out of ceramic now. Doesn't seem to be AlN either, just boring old Al2O3. Performance looks comparable, despite the relatively low Rth of the material (compared to AlN and Al). Not spendy either. Tim -- Seven Transistor Labs, LLC Electrical ...


Gun Humor

Started by Rick C in sci.electronics.design8 hours ago 30 replies

I watched an episode of Dharma and Greg where his office is giving performance reviews. Greg has only given his secretary a satisfactory...

I watched an episode of Dharma and Greg where his office is giving performance reviews. Greg has only given his secretary a satisfactory performance rating. She says, "You do know the day I snap and come back here with a gun, you're first." That's not so funny these days. -- Rick C. - Get 1,000 miles of free Supercharging - Tesla referral code - https://ts.la/richard11209 ...


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