Latest threads in Electronics Designshow only best voted threads
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OT: Common Enemies
OT: Common Enemies.... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts...
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7 years ago
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Atmel Bought by Microchip
Not sure how I missed this one for two months. I see there is already some serious contention with Atmel employees. I wonder what it will be like for the sales force to be selling PICs, AVRs and ARMs...
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7 years ago
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109 | |
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low-capacitance high-voltage diode
I'm looking for a good low-capacitance SMT 600V diode. For example, Vishay says a 1N4005 is about 5pF at 100V. ON Semi says under 3pF. Diodes, Inc says about 1.5pF. What to think? I suppose new SMTs...
12
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7 years ago
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low noise supply
It's hard to make a really low noise widget that's powered from a switching wall wart. The warts are noisy, both diff and common-mode. I guess a really radical multi-section common+diff mode passive...
28
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7 years ago
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OT: Fix/renew scanner rubber roller wheel
Hi I have an older HP Scanner with feeder. The rubber roller wheels are dried up, and won't grap the paper any more I searched for a fix, and found a special spray for the rubber, so it gets "sticky"...
10
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7 years ago
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Antique car load dump
My brother's trying to suck me into doing some work for old Fords. What are the load dump characteristics for older cars, particularly old positive-ground 6V cars? Are they the same as 12V load dump...
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7 years ago
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coherence length
A call today, someone wants to buy just a laser head. He said they liked our laser 'cause it had a long coherence length. I've never tried to measure it, but said it was related to the bandwidth....
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7 years ago
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Adding a dc offset to a signal
Hello, I'm struggling a bit with adding a DC offset to a slow (100Hz) ac signal. I thought I could feed both signals through series resistors into the non-in verting input of a buffer amplifier, but...
20
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7 years ago
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OT, houses falling down.
We went to Camelot in Pacifica, a tacky ersatz british pub, but they have Bass on tap and you can get the fish+chips with fried oysters. And the Safeway parking lot is just across the street. We took...
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7 years ago
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Female IEC connectors on ATX power supplies
I remember back in the day some ATX power supplies used to have an additional IEC connector on the back, sort of like this: That was handy. Anyone know why they don't see to do that anymore?
45
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7 years ago
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Touch Sensing (Capacitive, Proximity, others?)
All, I am working on an embedded application where I want the device to turn on (microcontroller wakes up) when the user touches the device with their hand . We want to conserve power and don't want...
17
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7 years ago
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measuring jitter with a Rigol scope
We got some pretty big orders and we figured that we'd need about 1000 hours of production test time to get the stuff out. So I am designing a couple of new test sets and the kids will grind out a...
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7 years ago
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200mW lasers for two bucks?
Car tail light "collision warning" lasers. Line-generators, but also floating logos following you down the road. Almost a quarter-watt output?! Gotta be a scam. Many are two bucks, free shipping all...
13
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7 years ago
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Zener diode below-threshold reverse current
I know the theory, more or less. In practice, what's the reverse current through a zener diode at levels well below the breakdown voltage? I've got a circuit where I'm feeding a 12V linear regulator...
269
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7 years ago
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269 | |
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shunts
I've got to remember to add a current-sense shunt to every power rail on every board. Supply current is too often something that I want to know. Low ohm resistors are cheap these days.
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7 years ago
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