Latest threads in Electronics Designshow only best voted threads
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A 2.4GHz to 1.5 GHz down converter layout, and VCO internals.
A 2.4GHz to 1.5 GHz down converter layout This is basically a VCO, mixer, and voltage stabilizer: The screw in the trimpot will allow fine adjustment of the output frequency from outside the box....
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9 years ago
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Motion detector - dsc lc 100
Hi. Is there a way to get NO contact from this motion detector ? I know that the NC is standard but there is terminal for NO / EOL but it's not triggering anything... The NC triggers normally. G.
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9 years ago
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another breadboard
People are always barging into my office and shouting numbers without a heads-up context, wanting decisions they should make themselves. And the phone rings and emails arrive all day. A boy can barely...
6
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9 years ago
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OT: Best Free Email (POP Only)
Cox is driving me nuts with their nanny-state behavior... Their Spam trap only allows options on where to send the spam after it's marked... no way to opt out of any marking... so just about...
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9 years ago
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end of TO92
Motorola/ONSemi, in disassociation with the KEC supply chain, has finally discontinued support for any remaining TO92 packaged parts (PD20685). It's not as though they've actually made any in an ON...
4
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9 years ago
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Drift mechanisms
In this circuit, the sample-and-hold function is provided by simply cutting the op-amp bias, and buffering the gain node with a MOSFET. Or to put it another way, an extreme example of controlling slew...
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9 years ago
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29 | |
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Chinese 100 MHz scope probes
Chinese 100 MHz scope probes I ordered a pair of 2 from ebay. One could not be compensated, is over-compensated. But 2 for 13 $ or so inclusive shipping. I like these alreay much better than my old 35...
2
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9 years ago
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Switch for barcode scanner
I have post this question before few days but this is not a bit different approach. OK. The scanner is powered over USB port on the RPI. I want to hook up pir motion detektor ( lc100 from dsc ) and...
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9 years ago
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Anybody know how to divide a QAM modulated carrier by 2 while keeping the modulation?
Anybody know how to divide a QAM modulated carrier by 2 while keeping the modulation? I just soldered in the 2.4 GHz VCO, this should result in a 2.4 GHz QAM modulated signal, but it would be nice if...
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9 years ago
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Powering ADC off a reference
Greetings, I was wondering if anyone could recommend a precision reference that could also be used to power an ADC. I have an LTC2440 (that's the part I have to use) it's a 24bit sigma delta, but I...
34
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9 years ago
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About PLL
Been working on the 2.4 GHz DVB-S transmitter (for satellite uplink). For now testing on 1575420000 BTW for you GPS paranoiacs that is in the DVB-S IF tuner input band, what comes out your LNB...
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9 years ago
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RE: John Fields
I just spoke to John Fields. He said he was tired of the bickering on the electronics newsgroups, and quit using them. He knows his website is down, and said he hasn't got around to redoing it.
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9 years ago
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Raspberry PI model B + and 5V relay PCB
Hi. I didnt play much with RPI but now we have finish one project where we are triggering GPIO. The PCB relay board should be triggered from RPI GPIO and the door should be opened. Now, before i...
25
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9 years ago
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MAX35101 ultrasonic flow meter
I've just come across a puff for this device. There's a 66-page data sheet It's a Maxim part, so it probably doesn't really exist. Has anybody actually got their hands on one? Or know what real parts...
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9 years ago
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How to attach a ground wire to the inside of a 19mm aluminum barrel?
A project I'm working on requires that a small PCB be grounded to the inside of an aluminum barrel, 19mm outer diameter/14mm inner diameter, inside depth of 25mm. Then potting material will fill the...
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9 years ago
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