Latest threads in Electronics Designshow only best voted threads
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Hermetic connectors
Hermetic multi pin connectors are expensive. I don't need high vacuum just something in the sub milli-Torr range. (If you know of a source of cheap-ish sealed connectors, please share.) I've made my...
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8 years ago
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LED Constant Current with JFET
I am using a JFET with a PNP transistor to regulate the current into an LED. I picked this topology because the LEDs include green and blue with a Vf of over 3 volts and my power source is only 5...
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8 years ago
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Keeping it together
I like to wind my own transformers and coils, on some projects I used rubber bands to keep the core halves together: These made in China crap rubber bands detoriate and chances are core halves fall...
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8 years ago
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Thunderbird Runs Slowly
I have always seen Thunderbird exhibit various delays and hiccups in normal operation. But lately it seems a *lot* worse than usual. There are times when I am typing and every letter has a large...
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8 years ago
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OT: organic farming versus conventional agriculture
Hi, Organic agriculture proven to outperform conventional agriculture, cheaper, less pollution, better soil, and no carcinogenic pesticides, etc etc.. seems like a no brainer, except for the lack of...
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8 years ago
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OT: language barrier
There's an older Chinese couple who lives in apartment down the road from me - lots of wealthy Chinese businesspeople have been buying property in the Boston area lately and they often bring their...
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8 years ago
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Yes it can be done
The question if using cheap ebay acoustic distance meter modules _can_ be used to do wind speed and direction measurements needed to be answered. In a first test the pulse changes were too small to...
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8 years ago
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Laser, graphene, propulsion
I heard about this on a Science 360 broadcast this morning. A laser pointed at a graphene sponge propels it forward. (not quite the same as skysail) The researchers have several theories as to why....
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8 years ago
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Acousttic wind speed measurement using phase only
The idea: idea is to simply _add_ direct and reflected signal, use a peak detector. You do not need the second resistor, there is enough direct coupling between the piezos. For 1 - 100 km/h wind speed...
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8 years ago
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Using a Pot to Tune a Coil
Please excuse the general question, but is there any way to tune a coil using a potentiometer? For example, let's say one end of the coil is connected to an antenna and the other end to earth. Would a...
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8 years ago
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Twisted pair (TP) capacitance, shielded vs unshielded.
Does having a grounded shield around TP increase the inter lead capacitance? By like, 1/2 the capacitance of each wire to the shield. Or put another way, if I ground one side (at one point) of the TP...
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8 years ago
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transformer/inductor design
There is a newer one. Author has good transformer link page: Useful Links | Kg Magnetics, Inc. Transformer Design Handbook | Maciej Noras
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8 years ago
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Re: Skybuck's PC for 2015/2016. (inquiry)
Get an iPad. Never, never think about opening it up. And have the Apple genius guys install all the apps for you. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and...
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8 years ago
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FYI
-- Many thanks, Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss: email: Please visit my GURU's LAIR web site at
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8 years ago
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Specs should be what you want, not what's in the data sheet.
4us propagation delay. 200kHz. Right. Damn. (Long day debugging what turned out to be a stupid design error. I hate it when I do that. Need to find some faster comparators!)
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8 years ago
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