Latest threads in Hobby Electronics Basicsshow only best voted threads
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welding
I `m trying to draw a power source. Do I have to weld with electricity tools? Aren`t any specific tools for electronics? ..................... Best regards, telmospts
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14 years ago
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Connect microphone to powered computer speakers?
Is there a low noise (not necessarily audiophile quality) OEM amplifier that can be used to power an electret microphone for connecting to powered computer speakers? Are there other solutions for a...
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14 years ago
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Setting Presets on Sony Dream Machine AM/FM Radio?
I've had the radio in Subject for years, and it's always been troublesome trying to set the resets. The power went out recently, so I get to do it again. Usually I recall how to do it. Not this time....
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14 years ago
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zener diode info and ID ?
i have a suspect zener diode from a PS . Zener, because the PCB says it is (ZD901) it looks like a small signal diode and it has a 16 and 2 printed on opposite sides. to test/replace --- the 16 is for...
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14 years ago
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Circuit Board Arc Track Repair
I have a 55 year old door chime clock and the board has carbon arcs which is causing a short. I have seen boards with this problem before and they were repaired using some type of filler. What is...
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14 years ago
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Wireless RF
Are pretty much all modern transceiver IC's the same as far as the circuit? All the ones I have looked at recently use a crystal and some passives for the antenna which I assume are for...
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14 years ago
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EMI prevention / protection?
I'm using a wein bridge oscillator as an audio tone generator in a radio modem (~2kHz). Ironically, when the transmitter is turned on, RF from the transmitter (~144MHz) causes the oscillations to die...
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14 years ago
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Electricity in Europe
Was in Portugal last year with a 50 watt converter. Didn't work worth beans. Any chance I can buy a plug when Im over there and a small clamp then only use one side of there 220 and the other side I...
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14 years ago
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Calculating Capacitance
Hello I need to create a capacitive sensor with two sensing probes. How do i calculate the capacitance needed for my sensing??? Thanks
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14 years ago
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Microwave oven transformers
Just scrapped another m.wave. Wasn't operating properly, was old, the display was faulty and what was showing was meaningless. Also sometimes it had started to microwave for no reason at all when the...
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14 years ago
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Need a quick inductive ignition tester
To test a non-starting vehicle's distributor, I need an inductive ignition tester to see if the central high voltage wire is getting juice. Can I whip one up with a simple coil of electromagnet wire...
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14 years ago
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Connect 36 volt battery to an ordinary 120V household lightbulb?
Should a 36 volt lithium-ion battery be connected to an AC lightbulb? Will that produce a dimmer light? Will it use less electricity than a normal 36 volt flashlight bulb? I have some 36 volt cordless...
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14 years ago
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Simple circuit to convert Bi-polar Square wave to Unipolar
Hi everyone. I want to convert my square wave signal generator to produce only a positive going waveform without just chopping off the -ve signal. The signal generator has variable output from 0-10V...
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14 years ago
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Why do we use PWM control?
I always feel thanks to all of the group members. Today I'd like to ask some basic question (the group title is basic). As is shown in the title, I don't exactly know why we use the PWM. I think that...
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14 years ago
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What is a unbalanced AC transformer?
I need to provide a 10VAC power supply to a cirris cable tester and they said it was unbalanced. It is a three pin input with the center being neutral and each side is hot 10VAC but it is unbalanced....
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14 years ago
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