Latest threads in Hobby Electronics Basicsshow only best voted threads
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Would LT3591 "plug in" to this circuit?
On pg 4 of this document, 4-LED string and setup is shown. What I'm wondering is whether this writer is correct and that this LED driver (and, I assume, associated components as show in the PDF...
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15 years ago
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Question: Can laptop run off 12v deep cycle battery?
On the road, a Dell laptop's AC-to-DC adaptor is powered by a 75W inverter plugged into the car's cigarette lighter recepticle. Is there any way aboard a small boat (using Radio Shack parts) a direct...
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15 years ago
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Cool demonstration of electromagnetic induction using a magnet and copper pipe
For those of you that haven't seen this in action: An eBay seller called magnet4less has a nice variety of neodymium magnets. I bought some of his 1/2" N48 sphere magnets. They work very well in 3/4"...
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15 years ago
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Need to find a R/S pc board 276-170
Which, apparently, they don't make anymore. This board is pre-etched to have the same exact pattern as one of their breadboards from back in the day - #276-174. So, I've done this circuit on the...
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15 years ago
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landscape lighting
We got a 12V outdoor landscape light kit from Big Lots (was about $30). 20 lights, 4W ea bulb, 100W 12VAC switching power supply. After a few hours, the power supply burned out. (Yay Made in China.) I...
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15 years ago
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Question about this charge pump
I have some questions about this charge pump: should give a gate voltage to nmos switch equal to 2Vdd, but i don't understand how does it....If i consider an input voltage equal to 0V,inverter gives...
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15 years ago
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power supply explanation
This news group business is a hard path to tread what with cranky australians and americans with money and magical Radio Shacks that have just what you want. Most of the replies were courteous and may...
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15 years ago
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full converter dc drive
What is the advantage, if any advantage in using a 4 SCR full converter instead of a 2 SCR,3 diode semi converter in a dc drive ? Thanks.
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15 years ago
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slo blo/time delay fuse
Is "slo-blo" the same as "time delay"
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15 years ago
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LED SOUND PROJECT HELP
Hi, I'm working on a painting that I want to incorporate some electronics into. I want to have a button on the front of the painting that, when pressed, will play a 20 second audio clip as well as...
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15 years ago
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Potentiometer question
How do you decide what pot to use from the eagle cadsoft library? I need to use a 2k board mount pot and would like to know the secret to picking the correct pot with the correct size for what I want...
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15 years ago
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long distance sensor around 20 feet help
Repost i know but i'm desperate I'm looking for a distance sensor sub $100 that will range out more than 20 feet. The situation is there is a fixed sensor with a crate moving towards it. the sensor...
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15 years ago
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power supply circuit
I would like to make an adjustable power supply using a transformer with a 24v 5a single wound secondary I would like the voltage to be adjustable from lowest to highest possible given transformer I...
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15 years ago
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References/circuit diagram for "overcharge protection"?
Hi, all, Still working on "understanding solar light", hopefully to build one. I know that it's bad to overcharge batteries, and that retail battery chargers have "overcharge protection" - I've been...
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15 years ago
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Simulation of a nonlinear capacitor
Let's assume a nonlinear capacitor with c(v)=dq/dv. The q-v characteristic of the capacitor is given by the formula q=3*(v^3) Let's also assume that it's charged to 1V and then connected to a 0.2 Ohm...
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15 years ago
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