Best Rated threads in Electronics Designshow all threads

Subject Author Posted Replies
 
Photodiode bootstrap phase rolloff
Hi all, I am currently working on a range-switched photodiode design for use in our laboratory [1]. It took me a while, but I've arrived at a design I'm fairly happy with (in no small part thanks to...
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16
 
Tek TDS 744A -> TDS 784A upgrade hack!
Hi, all, Just wanted to report success in upgrading my TDS 744A scope (500 MHz, 2 gigasamples) to a much swoopier TDS 784A (1 GHz, 4 gigasamples). It now identifies itself as a TDS 784A everywhere...
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7
 
Rectifier Schottkies in parallel
Hello, many Schottky rectifier diodes contain two diodes within a single package, usually with the cathodes connected. Does it make sense to connect the anodes too in order to get a diode which can...
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micropower boost circuit
I need a DC to DC boost circuit with an output defined not with respect to ground, but with respect to the input, which is variable. Output about 15 volts above the input, over a wide range -- from...
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42
 
is the hendershot generator ad a scam?
is it a scam? Will it work in a residential home ? From the context alone, probably. BTW: what is it? I've powered this house, and next door, from a scaled up pair of these for years. The key is the...
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102
 
Any designs for a cheap x-y position sensor?
need a cheap, low power [read that as don't want to pay much, and need it portable] x-y position sensor that tells me where I am when I ask.. specs 1. RELATIVE position once START is ok. Then can...
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2.5KVA transformer on square wave 1000hz mains
I just bought a 50/60 hz transformer rated 575VAC pri to 230VAC sec rated at 2.5KVA on ebay. I remember reading some time ago that transformer companies rated their transformers to 1000 hz. I'm...
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C programming question for Arduino
I'm wanting to make timers that work like PLC timers, a condition comes true, a preset period of time later code is executed. It would be something like: void mytimer(bool enable, long preset) void...
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Soldering iron tips
I've done my fair share of soldering, but never SMT. This video: ....is a good indicator of what's involved. The problem is, where do you get a tip like he's using. Took me awhile, but I googled him...
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65
 
propagation velocity experiment
This would involve CK722 transistors, slotline samplers, and pecan pralines [1]. Unit of measure would be kiloseconds. Let's see what happens. John [1] The crunchy kind, of course. Only Yankee...
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7
 
Protection circuit to be used for a gate pulse of SCR
Hello, I am doing a project on a temperature control controller has been designed in LabVIEW and I get a control signal of 0-5V output from DAQ which needs to be given as gate pulse to SCR.We are...
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3
 
Improved capacitance multiplier
So, I had this application requiring really absurd amounts of ripple rejection--it's a piezo driver in a laser wavelength locker that (for historical reasons) has to run off a fairly crappy dual...
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Peltier Controller Schematic
Can anyone point me to a schematic for a Peltier constant temperature controller? Thanks for any leads Sloman A.W., Buggs P., Molloy J., and Stewart D. =93A microcontroller- based driver to stabilise...
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21
 
generator conclusion
service 120vac 120vac signal o o o | | | o o------------* main | o o | | | | | house | | | | | | | | | barn | (COIL) --- --- | generator ignition -/- N.C. -/- N.C.. | o | | | | o generator o | --- ---...
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STmicro acceleration/magnetic sensor LSM303DLH == LIS331DLH + HMC5834?
Just had a look at the LSM303DLH datasheet and had a déjà vu ;-) It looks like ST has simply put a LIS331DLH and a HMC5843 into one package. (The HMC lacks the built-in voltage regulator) All data...
 
DSP Device for Guitar Pedal Effect
I was wondering what DSP chip would be appropriate for a guitar pedal effect. I need to sample the incoming signal preferably at 96kHz perform a simple numeric function upon each sample and output he...
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LT Spice schmitt oscillator
Does anybody have a working LT Spice netlist for a simple schmitt inverter/R-C oscillator? I tried one using the library schmitt inverter and get obscure sim errors, and I don't understand the HELP...
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Bi-directional audio over power cable
Hi, I'd like to add an intercom functionality to a broadcast camera and I'd appreciate opinions about the different solutions I have in mind. The main restrictions come from the cable, which is a big...
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9
 
Re: floppy drive emulator hardware usb or sdcard
en e NoLife ;-) One possibility is a virtual drive. One, create a virtual drive in memory. Two, make an image of your floppy disc contents on a flash drive. Three copy the image from the flash drive...
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2
 
rechargeable batteries
Hello How can I charge a rechargeable battery in the lab, what's the 'reverse connection'? "zooz" ** You use the normal connection - ie positive battery terminal goes to positive terminal of the...
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