Latest threads in Hobby Electronics Basicsshow only best voted threads

Subject Author Posted Replies
 
18650 battery holder
Is this the right battery holder so that I get 3.7 volts? Thanks.
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Looking for 2mm pitch 2-row female connectors
Hi folks, I've got an industrial PC module (MSI MS-96F6). I'm looking for matching connectors. 2.54mm molex is common, 2.0mm is not! 8, 10, and 12-way required. I'd be happy with either...
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mutual capacitance?
Looking at network theory and the duality theorems, why is there no mutual capacitance? i.e. electric flux linkages, symmetric to mutual inductance and B flux.
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PC PSU repurposing
I am going to repurpose a PC PSU & I have a question about minimum loading. Many/most PSU's require minimum loads on their outputs for the outputs to be powered, The PSU that I have powers its outputs...
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18650 for 3.0 v application ?
I have a door bell that uses 2 aa batteries. Would a 18650 work in such an application. I don't know if 4.1 volts would be too high. Thanks, Andy
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efficiencies of appliance 3-phase brushless motors?
Hello, What is the ballpark efficiency range of washing machine or clothes dryer three-phase 110-volt AC motors? I'm debating tearing a broken washing machine apart for the motor and controllers but...
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component identification please
I have searched google but cant identify these two components. I think they are Diodes. they look like Diodes, Black with two conductors at either end. 1 Says D1, only this. It has a two symbols on it...
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Terminology
You may have seen me rail against how the schools teach that inversion is t he same thing as 180 degrees out. Out of phase, by definition or etymology or whatever the fuck at least strongly implies...
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DAB radio kits?
There are plenty of AM and FM radio kits (= bag of parts and solder it yourself), but are there any DAB radio kits?
 
Re: More Math I Never Did
Music evokes strong emotions in some of us. Some of us go to irrational extremes to get a fix... Wine Women and Song, are things worth consideration IMO.
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Re: Cheap new device to pull capacitors from?
Buying junk to harvest parts? On the face of it, that sounds ridiculous. There must be something I'm missing here. Are you located somewhere where this becomes a feasible option? There are many...
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talking multimeter
Hi all, A member of our radioclub is starting to have problems with his eyesight, so he is looking for a multimeter that can talk. I've found one on the internet, but that product is only sold in the...
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Cell phone fast charging circuits
Hello, My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger. Is there a chip that performs this authentication? I'd...
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Speaker efficiency?
Since I will be playing a low wattage tube amp through speakers it seems that high efficiency speakers are in order. How can I tell the efficiency of a speaker from looking at the specs? Thanks, Eric
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Serious stereo tube amp questions.
I have always like exposed tube equipment. Since I was a little kid. So I have been thinking about getting a small stereo tube amp for the living room to replace the typical modern amp we have. That...
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