Tagged Questions
5
votes
2answers
167 views
Should I use multiple voltage regulators?
I have five devices that need to be powered. I would like to use one DC source to power the four devices. Should I use voltage dividers, voltage regulators or a mixture of both? Also, any ...
1
vote
2answers
67 views
Will a device capable of receiving a 200 Vrms input signal happily accept a 200 VDC signal?
To the best of my knowledge, Vrms is used to express an AC signal as the equivalent DC signal that would produce the same power dissipated in a resistor R; I believe this is best calculated using a ...
2
votes
4answers
437 views
Protect DC Circuit from too much voltage
How do I protect a 3v DC circuit from being damaged if someone accidentally plugs in a 12v power supply? The circuit will draw much less than 1 amp.
3
votes
3answers
212 views
Calculate power supply on distance
I need to provide 12V DC to a DC brushless motors that need 12V 30A at distance of 30m from the source.
The cables I can us are 20 Gauge, I know that the cables are loosing power, how can I ...
3
votes
3answers
180 views
What is the easiest way to lower the DC output (reduce voltage)?
I have 13.5 VDC output, and i want to power up a small radio that takes 4.5 VDC. I thought about adding 5/6 used 1.5V batteries in series, so it would be about 4.5 VDC for radio and about 8 VDC for ...
1
vote
3answers
2k views
How does current flow through a voltage source?
Im going back to electricity 101 to understand several things Im missing. One of them is exactly how does current flow through a DC source.
Heres my understanding: A voltage source is one which has ...
1
vote
2answers
89 views
Powering a fan with an AC adapter [duplicate]
Possible Duplicate:
Choosing power supply, how to get the voltage and current ratings?
I need to power this fan which is rated at 12 V, 0.95 A, 11.4 W. I am unfortunately without a DC power ...
0
votes
2answers
102 views
what methods could I use to step-up 700VDC to 5000VDC(approx)?
The input into my circuit is 5-15VDC; this passes through a digital potentiometer so that it can be controlled. Then there is a mini DC-DC converter which steps the voltage up to 700VDC. Now I need a ...
1
vote
1answer
297 views
how can I made a 12vdc to 19vdc booster/regulator?
This is a fairly specific question, but I think the answer could probably be applied to various voltages.
I would like to make a circuit that will take in a 12-14volt source (from a lead acid) that ...
3
votes
2answers
127 views
Do I need to double the voltage with double the motors?
I am totally new to electronics.
Let's say I am building a DC circuit with a motor using 6V taking 1.28A.
Now, if I build a circuit that uses two of these motors, will I power the circuit with 6V and ...
3
votes
2answers
6k views
230V AC to 5V DC converter, lossless
Is there any IC which converts 230V AC to 5V DC? As lossless as possible. I want to connect my microcontroller to an ordinary electrical socket and I don't have enough space available. Thanks.
3
votes
1answer
121 views
Identifying an irreducible circuit?
How would you go about identifying an irreducible circuit? By irreducible, I mean combining resistors whether in series or in parallel to reduce the circuit.
-5
votes
1answer
183 views
diode nightmares
Let me start by saying I am a complete amateur trying to stumble my way through some pretty basic PCB design, and I have run into a problem selecting diodes. The PCB I am designing will be for some ...
2
votes
5answers
1k views
acceptable bounds for replacement DC adapter [duplicate]
Possible Duplicate:
Chosing power supply, how to get the voltage and current ratings?
I've got a broken gadget that is discontinued. The only thing broken is the power supply (verified by ...
-1
votes
3answers
289 views
Voltage Limit of CAT 5 DSL wire
I have been using threads(single wire) inside CAT 5e wire in a project for providing input to the circuit and output to a telephone. The source is 50V DC but the input to my circuit is just 4.86V DC ...
5
votes
1answer
365 views
Get multiple individual DC voltage sources from a single line
If I connect 2 6V batteries or two individual sources serially the combined voltage should be the sum of the voltage of each battery (i.e. 12V). Is it possible to get 12 volts from a single source or ...
1
vote
2answers
2k views
How would I create a voltage doubler and what parts would I need?
I'd like to make a voltage doubler, I've read up on wikipedia and also here. My issue is that I have DC input and I need DC output, first is this even possible, second, if so the problem I'm having, ...
4
votes
3answers
720 views
Correct DC Adapter type to use for Arduino
What's the correct DC Adapter to use with Arduino? Voltage etc?
