Latest threads in Electronics Designshow only best voted threads
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Drop ceiling hole patch
Anyone have experience patching a hole in a drop ceiling tile after removing a device mounted there? It's a round hole, 2 or 3 cm wide. There doesn't seem to be a product made for this.
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7 years ago
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Anti-static cordless ESD wrist strap ...THAT ACTUALLY WORKS!!!
Heh. No, seriously. And no need for 500uCu of Po-210. When performing the VandeGraaff classroom hair-raise demo, I noticed something cool. The kids without any long hair, instead I always have them...
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7 years ago
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Surge Protection
Hi, What is the best choice currently for protecting SMPS circuitry in the event of surge at mains switch-on? I'm talking about the PSU sections of oscilloscopes, typically, so under normal working...
36
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7 years ago
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36 | |
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Optotriac resistor selection
I have a MOC3010 optotriac (from da junk box) that I'm trying to use to switch about 100VAC from a small inverter brick to a length of EL wire about a meter long. Right now I'm driving the internal...
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7 years ago
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A question showing my ignorance.
I'm working with my Boonton 260A, it is a older device with tubes. I don't understand how a D'arsonval movement is used where I 'think' there is an AC signal. What am I missing? Here is a schematic....
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7 years ago
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How to make a bipolar electrolytic capacitor from what you have in your junk box.
Let's say you need a >10 microfarad bipolar cap rated to stand off 10 volts, right away, and and all you have in your junk box is a 50 microfarad monopolar aluminum electrolytic rated to stand off 50...
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7 years ago
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OT: Class D Amplifier Design
Hi all, Please excuse this off-topic posting which doesn't involve US politics at all. I was just wondering what the efficacy of class D amps is when applied to the design of hi-fidelity audio...
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7 years ago
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111 | |
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Creating a "Moving" EM Field Between Two Coils
I would like to experiment with an electromagnetic field that "moves" in space. By this I mean a single zone of constructive interference that shifts its position linearly within the space between two...
19
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7 years ago
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OT: First Reports of Vote-Rigging Emerge in Early Voting
Crooked Hillary yet again falls back on her life-long habit of cheating 'cos she knows damn well it's her only hope: Her close pal George Soros is part owner of the corporation that makes the rigged...
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7 years ago
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quick way to measure C-V curve
I connected a 47 uF (that's MICROfarad) ceramic cap to a DVM and a 50 ohm function generator. Remove the cap and set the fungen to some reasonable frequency, sine wave. Set the DVM to AC and adjust...
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7 years ago
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Looking for a replacement for NXP/Philips TDA7052A/AT NXP 1W audio amp going obsolete...
This part, an 8 pin bridgable 1W audio amplifier with volume control input is going obsolete and last order date is end of this year. When I designed it in around 10 years ago they were old then but...
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7 years ago
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Meander line
Hi, All, Same sampler project, different question. In order to give the pulse generator time to settle down to baseline, I need to put a bit of a delay between it and the sampling diode. Board space...
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7 years ago
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ping Martin Riddle, Joseph Gwinn; signed AoE shipments
Hi Martin, hope you are feeling well, I need your shipping address. Joe, get in touch for a pickup, or do you prefer a shipment? Thanks everybody, two dozen signed copies sent out so far. USPS...
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7 years ago
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Holy c(r)apacitor dielectric, Batman!
Okay, old news (and I'm an old hand), but it still nearly bit me. I thought X5R / X7R dielectrics were fairly free of voltage-coefficient problems, but one of Spehro's recent posts gave me pause. Good...
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7 years ago
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AN: Spice Subcircuit Model Posted for TI LM4040 Micropower Shunt Voltage Reference Family
See LM4040.zip on the Device Models & Subcircuits page of my website. This subcircuit models the whole TI LM4040 Precision Micropower Shunt Voltage Reference Family. Simply set parameter VZ to the...
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7 years ago
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