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the hot new programming language

Started by John Larkin in sci.electronics.design2 hours ago 92 replies

http://www.itworld.com/article/2694378/college-students-learning-cobol-make-more-money.html The revival of Basic is next. -- John...

http://www.itworld.com/article/2694378/college-students-learning-cobol-make-more-money.html The revival of Basic is next. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


Low cost - long-ish distance laser?

Started by Dave, I can't do that in sci.electronics.design2 hours ago 28 replies

Hi, just saw this... https://www.youtube.com/watch?v=yZ7PrWUVWP8 We live out in the boonies and our front gate is about 900-feet line-of-sight...

Hi, just saw this... https://www.youtube.com/watch?v=yZ7PrWUVWP8 We live out in the boonies and our front gate is about 900-feet line-of-sight from the house. The gate is always closed to keep cattle in so UPS/FedEx drops stuff in a large crate at the front gate. Currently I have a large blue colored sheet that drops down when they open the lid to the crate and that works fine in


Square root circuit

Started by George Herold in sci.electronics.design2 hours ago 136 replies

Hi all, I may need to make a square root circuit to linearize the gain in a temperature control loop with resistors as heaters. (Speed is not...

Hi all, I may need to make a square root circuit to linearize the gain in a temperature control loop with resistors as heaters. (Speed is not very important.) For ~$7 I can use an analog multiplier (AD633) or something with matched transistors. ala B. Pease page 30 here. http://www.ti.com/ww/en/bobpease/assets/AN-31.pdf I'm wondering if there is something else (in nature) that natu...


Caution with bitcointalk.org

Started by Skybuck Flying in sci.electronics.design7 hours ago 8 replies

Hello, For some reason I cannot reset my password on bitcointalk.org. I find this somewhat suspicious. There is "news" going around that...

Hello, For some reason I cannot reset my password on bitcointalk.org. I find this somewhat suspicious. There is "news" going around that they got "hacked" / "social engineered". How does this explain the inability to reset passwords ? No e-mail link/message/confirmation is received. At least not on my e-mail address. I wonder if my e-mail address was changed or if I put it in ...


feedforward clipper

Started by bitrex in sci.electronics.design7 hours ago 35 replies

Here is the schematic of a feedforward clipper/limiter http://imgur.com/doI5Op3 I guess I don't understand how the clipping threshold is...

Here is the schematic of a feedforward clipper/limiter http://imgur.com/doI5Op3 I guess I don't understand how the clipping threshold is set? It doesn't seem like it would be independent of supply voltage?


Charger for SLA 12V / 7Ah battery

Started by gm in sci.electronics.design7 hours ago 25 replies

The subject says all :-) I connected 3 x 12V / 7Ah battery's is serial and start to charge them with my ebike 36V/1,2A charger. After cca 30...

The subject says all :-) I connected 3 x 12V / 7Ah battery's is serial and start to charge them with my ebike 36V/1,2A charger. After cca 30 minutes battery pack was getting hot, so i disconnect the whole stuff. What is the highest charging current for such battery's ? The funny thing is that i use the same charger to recharge my 36V ebike battery pack, and there was no problems whats...


Resonant Coupled Inductor

Started by Harry D in sci.electronics.design9 hours ago

I just got a paper published in Power Electronics Design on Resonant Coupled...

I just got a paper published in Power Electronics Design on Resonant Coupled Inductors. http://powerelectronics.com/power-electronics-systems/design-pfc-resonant-coupled-inductor-doesn -t-distort-power-factor I believe that this is an overlooked component that should be in your toolkit. I will answer any questions to enlighten this subject. Regards, Harry D.


OT: vaccines again!

Started by Jamie M in sci.electronics.design10 hours ago 40 replies

Hi, More evidence about the dangers of vaccines: "Adverse Events After Routine Immunization of Extremely Low-Birth-Weight...

Hi, More evidence about the dangers of vaccines: "Adverse Events After Routine Immunization of Extremely Low-Birth-Weight Infants" http://archpedi.jamanetwork.com/article.aspx?articleid=2300376 http://kellybroganmd.com/snippet/tiniest-ones-doctors-ignore-data-premies/ " With most infants receiving 3 or more vaccinations, the incidence of sepsis increased from 5.4 to 19.3 per 100...


OT: Photoeye

Started by Jim Thompson in sci.electronics.design11 hours ago 3 replies

Where can I find a simple "photoeye" device that works by shining on a reflector and simply operates a relay when the beam is interrupted? All...

Where can I find a simple "photoeye" device that works by shining on a reflector and simply operates a relay when the beam is interrupted? All I can find is expensive stuff that runs a ding-dong "annunciator". I could cut that up, but would just as soon not. Thanks! ...Jim Thompson -- | James E.Thompson | ...


Linux question

Started by John Larkin in sci.electronics.design17 hours ago 64 replies

Wrong forum, possibly. Can two separate programs (not threads) share a file handle? I'd like to have one program open a file, read a...

Wrong forum, possibly. Can two separate programs (not threads) share a file handle? I'd like to have one program open a file, read a little from it, then turn it over to another program that reads the rest of the file, all the way to EOF. Sharing a memory region between the programs is apparently no problem. Or, where should I ask this question? -- John Larkin Hi...


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