Latest threads in Electronics Designshow only best voted threads
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Syncing Audio Tone Over Phone Line
Here is a stange one. We are doing an experiment that involves modulating an RF carrier with an audio tone. There are two transmitting stations involved. The tone will be generated at one. But the...
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9 years ago
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Pissed at FBI ! and whoever else is involved with this BS.
Taking away computers is not cool and not very modern ! Cowboy style: Euro-trash: Tell your politicians to throw away their computers/mobiles and see if they like it ! Other solutions should be found...
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9 years ago
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Solder paste -- better late than never
After more years than I would to admit. I discovered that solder paste that is used for copper tubing, works great for cleaning and making wire joints much easier to solder....
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9 years ago
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+1/-1 gain stage
Hi all, Just playing with ideas for a +1/ -1 switched gain stage for an opamp. So the first one just uses a double throw switch to switch the output. And then 2.) is the "classic" switched input. And...
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9 years ago
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The Death Plane Flies On - an explanation
We must accept the possibility that the plane flew on, loaded with corpses. Here is one item that I didn't see in the postings: Malaysian Airlines had on board a type of Lithium battery which were...
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9 years ago
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GPIO out of PC - Clarification, USB 2 SPI
Thank you all for your thoughts on this. I want to clarify my question, since the issue has become more focused, as I see it. What I'm looking for s a high speed USB to SPI interface. Thw question...
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9 years ago
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The Power Bank
If there is any one can help to check the items we are going to sell with a few minutes? We want to know the if the customers will be pleased with the products. And if any one who can visit the...
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9 years ago
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Synchronous post-rectification
Hello, my master power supply provides me with synchronously rectified, but not filtered (!) AC current. For the used 12V toroidal transformer the output waveform is thus 17V*abs(sin(50Hz)), up to...
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9 years ago
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Law Enforcement Using Twitter for Real Time Updates of Criminal Activity
Just because it is beyond your rather limited imagination , Joerg/JosephKK, doesn't mean it's not useful. Like I said, obsolete. The DNA mist seems rather interesting too, now instead of getting...
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9 years ago
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Robbery Suspect Tracked by GPS and Killed
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9 years ago
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Li-ion shelf life
Once upon a time a chem-type told me a Li-Ion cell's electrodes went irreversibly into solution if the cell was allowed to drop too low for too long, and the all-knowing internet confirmed it. Plus I...
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9 years ago
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Getting GPIO out of a PC? Best way?
GPIO pins, which are just digital high-low pins under SW control, are generally the simplest output from a CPU IC. Does anyone have an opinion about the best way to get this functionality out of a...
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9 years ago
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Dual to AllPass.?
Does there exist a dual to an AllPass, that is, a structure in which amplitude varies with frequency, but phase does not? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | |...
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9 years ago
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Writing a RF weather fax program
Writing a RF weather fax program This is received on 8038 kHz, with a cheap Tecsun 1 kHz step SSB receiver, indoors with a small telescope antenna: wget Converted to mp3, recorded as 48 kHz 16 bits...
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9 years ago
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Multisim - how to do an ac sweep of voltage, not frquency?
I wanted to plot linearity of a circuit with an input of 1 to 200mV 1kHz. Thought this would be easy using a simulator - but in the end had to do it the hard way with generator, meters and pencil. Is...
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9 years ago
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