Questions tagged [voltage]

Voltage, otherwise known as electrical potential difference (denoted ∆V and measured in volts) is the difference in electric potential between two points (adapted from Wikipedia). Voltage can be constant (DC) or varying (AC).

446 questions
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Determining suitable wire gauge for LED-strips (voltage drop)

I am software engineer by trade and a novice in this field, please point out any mistakes in my assumptions and vocabulary regarding this topic. I am designing a lighting plan based around commonly ...
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Mistake in published paper about magnetic levitation?

As I was reading through this paper: Nonlinear Model & Controller Design for Magnetic Levitation System, I stumbled cross section 3.3 which I could not follow. Summarizing section 3.3 Non Linear ...
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Convert [-24V,24V] range analog signal to [0V,3.3V] range for ADC

I need to realize a circuit that converts an analog signal from [-24V,24V] to [0V,3.3V] before sending that signal to an ADC "MCP3208". I found the circuit in the picture below and it works perfectly ...
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Voltage Translator (74HC4050) Voltage Fluctuations

I have a simple circuit with a simple problem that I just can not fix. I have a 74HC4050D hooked up to an SD card. I have a 0.1uf on the 5V line and 2.2uf on the 3.3V line. Whenever a signal is sent ...
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PSpice VSIN frequency - how to set it in rad/s?

I know, that if I want to set FREQ, I need to set it in Hz, not in rad/s. I know, that 1 Hz = 2*pi rad/s, but how to do this in PSpice? What should I enter exactly? and btw. if I want to set VOFF (...
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How to go about finding the transfer function of a non-linear circuit?

Note: The concept of Transfer Function is only defined for linear time invariant systems. Nonlinear system models rather stick to time domain descriptions as nonlinear differential equations rather ...
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Off load voltage in npn transistor as a switch

There is transistor tutorial on sparkfun.com (https://learn.sparkfun.com/tutorials/transistors/all). I am wondering why there is 1.3 V drop depicted across the LED1 on the picture, since when the base ...
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Source voltage of circuit with diodes when output voltage is given

Tried solving this using KVL, and solving to get the currents for the different parts of the circuit, however got stuck when trying to compute the source voltage especially that I'm unsure if the ...
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Finding Current in Parallel RLC Circuit with 2 voltage sources?

I've spent sometime learning about step responses for series/parallel RLC circuits, but this problem takes things a step further, since C seems to be in parallel with a series combination of RL and a ...
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How do you calculate average absolute value of a sum of sin functions with different amplitudes and frequencies?

I cant seem to find the answer anywhere. I remember there was a simple formula for doing this but I dont have the book with it anymore. Finding where the function is positive and where is negative and ...
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RL Circuit Analysis with 2 sources, how to find current of resistor?

I've been tackling some problems related to natural and step responses for RL & RC circuits, but I think I've hit a major roadblock for this RL circuit. I'm trying to find the time constant and ...
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Problem understanding an exercise regarding impulsions

So, I'm having quite some trouble understanding and solving the following exercise. We're given the following montage We are told that the following square signal (called Vin) is applied Now, we ...
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Xbee TX pin voltage wrong when booting with UART connected

I'm interfacing an XBee PRO 900 HP with a Beaglebone Black using UART5 on the BB. I'm using the 5v interface board from Adafruit (XBee Adapter kit - v1.1) I'm have been having intermittent problems ...
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Using a Ryobi 36v battery to power an electric kart

I'm attempting to use a [BPL3650][1] 36v Ryobi battery as the power source for replica electric willy's jeeps I've constructed for my kids. The batteries charge fine in the standard chargers ...
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Measuring voltage between two points

I Have the following Schematic: The book i am using ask for $V_{BC}$ which I found by $V(B) - V(C) = 0V - 9V = -9V$ The book gives the answer as 9V, is it safe to assume that since voltage is ...
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DisplayPort cable 2.5V for non standard use

I want to use a DisplayPort connector and cable for transmission of a custom 8b/10b protocol (not the DisplayPort protocol). Does anyone know if these cables are good for use at 2.5V instead of 3.3V ...
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I have built a buck regulator with a Texas Instruments LM5575-Q1. It was designed to handle an input range of 9-75V and output 6V at 500mA. When I have no load it does measure 6V but as I increase ...
Many books (Chenming-Hu Ch.6 Page 15, Neamen Page 413) use the term 'channel voltage' $V(y)$ to mean 'the potential in the inverted channel at a point $y$ distance away from the source along the ...