Latest threads in Hobby Electronics Basicsshow only best voted threads
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Why are engineering sample CPUs illegal to sell?
Why are engineering sample CPUs illegal to sell?
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2 years ago
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How long to charge 9v nimh battery
I have a 9V 180 ma discharged Nimh battery that I am charging at 25ma. How long will it take to charge? Thanks, Andy
4
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2 years ago
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MOV Search
Hello, I am an Alarm Technician among other things or stuff. I was thinking about installing a simple MOV on the Transformer that feeds power to the Alarm Board. The industry standard is 16.5VAC 40VA...
4
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2 years ago
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DC motor soft start
I found this neat soft-start circuit on the eevblog forum. Its neatness is that the gate threshold voltage occurs immediately and then the RC softness kicks in. V+ ________________________ V+ | | 1M...
6
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2 years ago
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Potentiometer Project
I'm working on a custom project that involves potentiometers and picture adjustments on the monitor they are connected to. To determine whether or not the potentiometers I need exist or if I need to...
4
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2 years ago
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4 | |
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the fable of the diode
Once upon a time, there was a village called Diode. The inhabitants were an excitable lot, who tended to get charged easily, positively or negatively. They liked to play musical chairs. When a...
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2 years ago
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DC relay coil
I have a DC relay with the coil connections marked "+" & "-". Does it matter? The relay operates with either polarity so there is no internal flyback diode. It's a 24v, 33ma coil for those who want to...
5
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2 years ago
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Semiconductor manufacturing locations
Hello, In light of the cargo ship debacle in the Pacific, I am trying to determine which companies still manufacture semiconductors in the US and Europe. I found these: Apparently Analog Devices is...
4
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2 years ago
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anti-music "remote control"
Residents who are fed up with the noise from China's ubiquitous "dancing grannies" are resorting to a special device that could mess with the speakers that blast out loud music. They use an infrared...
3
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2 years ago
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DC motor supply
I have a 24v DC motor that I'm using with a PWM controller supplied by a 24v SMPS. I want to be able to briefly switch the motor to 48v with a relay. I don't have a 48v supply, but I do have a 24v...
4
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2 years ago
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4 | |
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Confirmation needed
I'm going to make a 12v DC power supply with a linear reg. I will half-wave rectify 12v AC and have a smoothing cap. The load is only 10ma. So: 12v RMS is 17v peak, minus the diode drop of 0.7 is...
5
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2 years ago
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transformer core material
AIUI you use iron cores for low frequency and ferrite for high frequency because ferrite doesn't get magnetized, so why couldn't aluminum do the same?
29
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2 years ago
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29 | |
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Re: What are the standard abbreviations for colors in electronics? IE. R = RED.
I know several. But the OP wasn't asking about color code, he was asking about color abbreviations. R for Red; G for Green etc.
4
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2 years ago
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Solar charger
I have a solar charging I am using with my car battery. The current voltage of the battery is 12.7 volts. And the charger is still charging. Here are some specs for the charger. Rated power output =...
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2 years ago
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1.8mm Pitch Connectors
2.54mm connectors are easy to find. Is there anything off the shelf for 1.8mm?
3
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2 years ago
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