The voltage-measurement tag has no wiki summary.
3
votes
2answers
107 views
ADC for measuring 0-5V but connected to 3.3V device
I have a BeagleBone (BB) and want to connect the analog output of a motor controller to it. The motor controller creates an output in the range of -4V to +4V and the BB anlog inputs only accept ...
2
votes
3answers
132 views
How do I calculate the input voltage based on an ADC reading?
+UB is a 12V power supply. I have to find the voltage on U_KL30.
I take this U_KL30 as an input at PortA<1> of my MC9S08DZ60 and use an ADC to get a ...
2
votes
5answers
101 views
Flow of current in a simple inverting amplifier circuit
I am considering a simple circuit like the one below. Let us say that the voltage source suddenly turns on (from 0V to 1V), then current will through through the resistor R1, correct? But assuming ...
2
votes
1answer
161 views
Why does my PSU die everytime I test with multimeter
I've set up my PSU to use as a "lab power supply", I'm trying to obtain 12 Volts at 14 amps. I have the red, orange, yellow, black wires separated, and connected the green wire to ground to keep the ...
-1
votes
1answer
62 views
Battery Monitoring IC for 24V 480Ahr SLA
I'm building a battery monitoring system for a large automotive application. Is there any IC tuned to measure a Lead-Acid battery pack's voltage, current and state of charge? The closest I got was ...
1
vote
1answer
90 views
Why do my 3 custom voltage pulses stop working as soon as I plug in the A1362 Hall-Effect sensor?
Why does the Vout pin in the diagram below receive 8 volts with Vcc = 0 volts, but becomes 2 volts when Vcc=5 volts. If switch SW9 is closed, circuit theory says Vout should always stay at 15 volts ...
1
vote
3answers
89 views
Embedded system-current draw logging
I have an embedded application that wakes up every 15 minutes and performs some specific function for a period of two minutes.
I need to log the current consumption of this specific function on the ...
1
vote
0answers
81 views
Need help with generating a bi-phasic current
I'm trying to generate a symmetric biphasic current pulse using a Grass S88 Stimulator.
Here's a diagram:
SG is a signal generator with two outputs, S1 and S2, which are generating a periodic ...
0
votes
2answers
308 views
Measuring external voltage on Arduino
I have a Logitech Steering wheel which I would like to interface to an Arduino whilst using it on a Playstation. My aim in the have the inputs from the gas and brake pedals light up a bar graph to ...
1
vote
1answer
230 views
Lipo battery monitor for 1s-6s packs
I want to be able to output lipo battery voltage to a display the remaining juice in the battery much like a fuel gauge. It has to work for 1s to 6s batteries and it would be ideal to work using an ...
2
votes
1answer
764 views
Measure 12V 35Ah battery level in arduino
I am building an arduino device controlling a solar power system. I am a beginner and would like to know what kind of part I would need to connect to the board to acheive this.
-2
votes
1answer
155 views
How can I build a voltmeter / logger? [closed]
I want to build a device whose primary function is a voltmeter without a display. Instead of having a display I want it to interface with a smart phone via bluetooth to read the voltage. Optionally I ...
2
votes
2answers
119 views
AA cell for low power embedded system -Debugging help needed
I am using AA LI cells for an embedded system project.This is a low power embedded project with various modules consuming current in pulses.
Recently one of the prototype board stopped working. ...
4
votes
2answers
217 views
Floating voltage measurements
Is there a very cheap way to measure several voltage differences of 0.1V to 10V (to ~1% accuracy at 10Hz, say), where each pair of measurement terminals may be tens of volts away from the ground of ...
-1
votes
1answer
52 views
Wrong voltage sent to output
Using miniLab1008, I am trying to send 10V to my D/A OUT0 but it sends only 5V and when I send 5V, I get 2.5V. I am using the universal library example VOut01.c
Is this a board problem? However using ...
