Latest threads in Electronics Designshow only best voted threads
| Subject | Author | Posted | Replies | |
|---|---|---|---|---|
|
|
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 side-by-side and have their far fields mostly cancel. I need two anyhow. Most are...
10
|
9 months ago
|
10 | |
|
|
Need substitute for old Siliconix FET to replace Thyratron
I have a circuit to replace a 2050 Thyratron tube with a FET and an SCR C106, but I am having trouble sourcing the FET as I am not sure how to translate the only specs on it that I can find to...
33
|
9 months ago
|
33 | |
|
|
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 external NTC resistor (from 1kohm to 15kohm). I will control it with USB from a PC...
17
|
9 months ago
|
17 | |
|
|
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 upper voltage level opinion for not damaging the meter in this use? I have used it...
3
|
9 months ago
|
3 | |
|
|
The Dims want to jam EVs down our collective throats
cars would have to achieve 66.4 miles a gallon in 2032, up from 44.1 mpg last year. The ramp-up for trucks and SUVs is even steeper—to 54.4 mpg from 32.1 mpg. Auto makers will have no way to comply...
9
|
9 months ago
|
9 | |
|
|
addon functions
Lewin Edwards in his dosfs file system uses the ldiv() functions shown below: sector = ldiv(offset, SECTOR_SIZE).quot and offset = ldiv(offset, SECTOR_SIZE).rem Anybody know how this is declared or,...
1
|
9 months ago
|
1 | |
|
|
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 sample/hold. I'm clocking at 1 Hz. That works. I can export the waveform, but...
2
|
9 months ago
|
2 | |
|
|
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 devices at near infrared. How is this different from IrDA, the standards for which...
3
|
9 months ago
|
3 | |
|
|
Ambient Temperature and Pressure Superconductor
I'm surprised no one else has mentioned this here. web site is often down from the high traffic volume. The visit counter is reset at 10AM KST or 9PM EDT. The long and the short of it is, they appear...
17
|
9 months ago
|
17 | |
|
|
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 remover" or a polar solvent such as methanol or acetone, it leaves all this white...
36
|
9 months ago
|
36 | |
|
|
"Mr. Static" ESD articles
articles on ESD brought to mind by another thread mentioning articles published with a pseudonym. (My favorite pseudonym was Marmaduke Surfaceblow, the intrepid cigar smoking troubleshooter in a...
1
|
9 months ago
|
1 | |
|
|
Greenland really was green 400,000 years ago
evidence is "bulletproof" according to scientists. This totally refutes the claim that we are now in the warmest period EVER in Earth's history. It also opens another chapter in the Cold War history...
16
|
9 months ago
|
16 | |
|
|
Ball Join Push/Pop
BJ pop: push: problem is that some BJ pins are flush mounted (i.e. control arm) and some are extrude mounted (i.e. tie rod). I have to add temporary pins and spacers to make it work. Ideal tool would...
8
|
9 months ago
|
8 | |
|
|
I2C speed
Hi, I need to bit-bang a fast mode I2C stream and started reading the I2C specs from Philips carefully. Table 11 says the minimal SCL period (tLOW) is 1300ns, while tHIGH is 600ns. That implies...
13
|
9 months ago
|
13 | |
|
|
paper vs. metal and rubber
The anti vehicle paper device killed metal (control arm) and rubber (CV axle). Already replaced control arm. Need to repair CV axle. What kind of grease should I use? High temperature grease? I think...
26
|
9 months ago
|
26 |