DC stands for Direct Current, which means the flow of electric charge in a single direction. Examples of a DC source are batteries, solar panels, dynamos.
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Can a 2-prong AC/DC converter switch polarity based on inverting the plug?
I got an electrical engineering degree 15 years ago that I barely use. Although I bought a fairly fancy multimeter, I will freely admit to having only a vague recollection of what I did back then... ...
3
votes
2answers
388 views
Best Circuit Design for a 12VDC Wall-Wart > Ouput Voltage of 1.5V (Replacing Alkaline Batteries)
I have multiple stationary baby items for my son Oliver that require a serious supply of batteries each month. I would like to hook a few of these stationary items up to wall warts to conserve the ...
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votes
2answers
1k views
Methods of filtering noise caused by DC brush motors
I am looking for any information that would help me reduce the power rail noise and EMI of DC brush motors. I am building a robot that is powered by 2 x 250 W 24V DC motors.
Thank you in advance
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votes
2answers
632 views
DC power line communications
I want to send a signal through the DC power lines used in railway compartments.
Can you please help me to do that, or provide some documents or links?
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votes
7answers
941 views
Is it safe to use a DC power adapter that isn't UL Listed or CSA certified?
I picked up a 9V switching DC adapter from SparkFun a while back, but I've been hesitant to use it because it doesn't have any of the usual "safety" approvals that you normally see on power adapters ...
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2answers
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Can Arduino Mega handle 6 motors independently
I wonder if anyone can help me
I am modifying an ROV and thinking of using Arduino Mega
I am new to electronics and robotics and wonder if the Arduino Mega can control 6 DC motors independently as ...
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vote
1answer
192 views
Measuring Voltage of Unknown Type
My circuit is almost identical to the Wikipedia but with 5V in, 1pF cap, 4 pieces of IN4004 diodes. I am not certain whether it is AC or DC here and there (actually I do but not want to break my ...
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votes
4answers
3k views
DIY Beginner's DC Power Supply?
My school uses HY 3005D-3 but I want to do it myself to save on $. Before opening it, I ask for tips about: not-to-break-it, cheap DC supply and DIY-materials (not that I know them soon). So how to ...
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4answers
890 views
dc level shifter
I am a high school student. Please help me, i want shift a 24 volts at the input to 6v on the output!! i need a dc level shifter but i dont know its contents!!
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vote
2answers
399 views
DC Gear motor Operation
I just bought a DC gear motor- I'm trying to spin a 20 pound disk. I realize I need to hook it up to a power source, but I'm having trouble figuring out the proper source. PS I also got a DC speed ...
6
votes
2answers
1k views
Can I combine the power supply?
Here's the circuit I'm working on, it's a robotic stringed musical instrument thing, that uses 6 DC motors and an Arduino Duemilanove -
The resistors are 0.25w 1KΩ
The transistors are TIP122 ...
3
votes
5answers
611 views
How to deal with a DC adapter with irregular voltage output?
Background information:
I tried hard to get a Schmitt-trigger working, but it kept failing. By accident I figured out, that my AC-to-DC adapter produces a very irregular voltage output (I could hear ...
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votes
3answers
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simple circuits 1.5v dc to 9v dc
Anyone got any super simple circuit designs for converting 1.5v dc to 9v dc?
Maybe something that uses a couple of transistors would be good?
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votes
5answers
7k views
Very Slow Electric Motor
A customer has asked:
I want to slow down a small hobby
sized DC motor to a user variable
range that runs from slow to zero
RPM. I would simply use a wall wart
for a power supply and a ...
6
votes
3answers
528 views
DC Boost for low voltage?
I have a project where I'd like to convert a .5V, 800mA supply (a solar cell) to at least 3V with as much efficiency as possible. I've seen DC boost converters, but all the ones I've seen are designed ...
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3answers
723 views
Correct DC Adapter type to use for Arduino
What's the correct DC Adapter to use with Arduino? Voltage etc?
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votes
2answers
3k views
How do you read newer HDD motors (DC/Brushless) into arduino? (like stepper motors)
We had a version of the HDDJ working with an arduino reading an old stepper motor (with 4 wires), then sending serial data to processing, using a midi library, and midiox + midiyoke. Having trouble ...
