Tagged Questions

121 views

Charging phone battery with a high current source

I am working on a project which the goal is using some android tablets to show pieces of video file to form a multiscreen. One electronic problem that I have faced is: The tablets should be always ...
136 views

How do you drive a high current load from a moderate current source?

If I have a power supply that can supply 5A @ 12V and I need to be able to supply an inductive load with 20+A @ 12V, how would I go about this? I need a burst of current for about 2-5 seconds. Will ...
75 views

What defines a source of power, the current or the voltage?

I have an apparently simple question, but I can't seem to figure it out. I learned in school that the generators (source powers) are defined by their voltage, and that made a lot of sense to me. ...
115 views

Does current source affect flow of current in circuit with a variable resistor?

Suppose you have a current source in series with a resistor R the current through the R resistor would be the current generated by the current source. How would the current through the circuit change ...
57 views

Current source and resistor

If i have a current source and a resistor in parallel, i will have two nodes,if i ground the the node which faces in the direction of current of the current source will all the current flow to the ...
448 views

How to build a voltage-controlled current sink / voltage-controlled resistor

I am trying to control a current through several current-mirror device (specifically the IREF pin on the TLC5940) using a single potentiometer. I've tried using a ...
170 views

How to find the current and Resistance?

Ok Everyone DownVoted! i am sorry about the diagram! So i Updated it this is my new diagram: simulate this circuit – Schematic created using CircuitLab Then Now how to find I1? what is ...
158 views

Can a too powerful battery damage a circuit? [duplicate]

I have an IOIO board, a 13V 10A Battery (when I tested with my multimeter). For the IOIO board, 5-15V, ~10mA is enough. Can a 13V 10A Battery do wrong to the board or is it okay?
246 views

How does current split in a circuit?

I'm redesigning a board that has a lot of peripherals attached to a SOC. These all use different voltages. Board is powered with 12V,1A Most peripherals are connected like this: RJ45 <-> GigE phy ...
245 views

Need help designing a current controlled source in PSpice?

The image below shows an electrical network with 8 elements, a current controlled source, a bunch of resistors, one current source and a voltage source. Although I haven't labeled them, there are 5 ...
640 views

What is meant by relative voltage?

Suppose you have a circuit ,you are told that the voltage at point 2 relative to point 1 is -90V, the voltage across R2 is -30V and V0 is 200V. What is the meaning of voltage at 2 relative to 1? ...
216 views

Why don't my coil work?

I disassembled my old Niko RC car today. Thought I could play around with the parts. But what I can't seem to understand is the coil. The powersource of the rc car is a 7.2v NiCd 620mAh battery. And ...