All Questions
Tagged with measurement analog
37
questions
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Standards for measuring analog audio signal devices
I'm making a Analog Channel Strip for a project. I'm searching for standards that let me or give me an advice of how to measure Dynamic Range, THD and THD+N, SNR, Frequency Response and input/output ...
4
votes
3
answers
820
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DC voltage 48 - 58 V to 0 - 10 V scaling
I have four 12 V lead-acid batteries in series and want to measure the total voltage. I'm interested in the 48 to 58 V range. How can I convert the range to represent it with a 0 - 10 V volt meter?
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2
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Which variations of the flash ADC is correct?
The flash ADC I learnt in class is this one with R all of the same value:
I found different variations on the internet:
This one has the top resistor with 3 times the value of other resistors.
This ...
- 1
3
votes
4
answers
881
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Solving for elements of a conductance matrix, given the voltages at each node
I'm trying to solve for the elements R12, R14, R23, R34 in the following circuit.
Resistances to ground R1, R2, R3, R4, voltages at nodes V1, V2, V3, V4, and input current I0 are all known.
The ...
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2
votes
1
answer
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How to make an accurate strain gauge conditioner
I need to measure tensile strains between 0 and 0.01%, with an accuracy between 1 to 10% within that range.
It seems like all systems that read strain gauges rely on a Wheatstone bridge to amplify ...
- 9,906
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1
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82
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Efficient Switching of I/O
Reaching out as I am in the initial stages (read: crude block diagram) of circuit design for a project aiming to automate resistance checks between various connectors. We'll call these connections A ...
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1
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0
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402
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HX711 zero factor
I have three load cells (YZC-1B). These load cells' capacity is 50 kg. I guess I use Bogde's HX711 library.
In monitor, the zero factor for the first two load cells is 8,000,000, but for the last load ...
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20
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5
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Why is this meter giving different readings depending on its orientation?
My newly-restored (re-capped) 1950s vacuum tube voltmeter is now operational...but there's one further issue. The meter gives correct readings when lying on its back, but when oriented vertically- as ...
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1
vote
1
answer
208
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Is my bandpass filter oscillating?
I have built the following circuit both on a breadboard as well as Veroboard and both times when I power it up and apply a 1 KHz sine wave my output ends up very "noisy".
The resulting ...
- 321
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2
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1k
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Analog Oscilloscope Flickering Signal Problem
I am using BK Precision 2125C Dual Trace Oscilloscope (30 MHz), which is analog. I'm trying to observe signal generated by the output of microprocessor. I'm seeing flickering signal (quickly moves ...
- 2,432
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163
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What opamp configuration to choose to measure 1kHz square wave with 1MHz signal modulated on it
I have 1kHz square wave I would like to measure the max and min voltage of. But, it is asymmetrical in both amplitude and duty cycle and it has a 1MHz 1V signal on it. The input impedance should be > ...
- 325
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LVDT Measurement question
Is there any reason one might want to measure both the primary and secondary coils on an LVDT? I assume the primary coil excitation voltage would be constant, but I see circuits around that measure ...
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3
votes
1
answer
157
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To find theRMS noise voltage in a circuit, can the measured RMS voltage be subtracted from the RMS voltage of shorted probes?
I'm trying to estimate the SNR of a circuit, which includes measuring the noise power of an analog trace. Right now, I'm attempting to measure the noise with a high bandwidth scope probe, ac coupled, ...
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1
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2
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265
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Can I connect Analog and Digital Voltage Source together?
Is it bad if I connect the A_VDD and D_VDD Pins together if I want to use the same voltage? Or maybe I should ask: Why can I hook up different voltages other than galvanic decoupling? This is the IC I ...
- 195
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Pressure sensor for breathing
Could anyone suggest the type of pressure sensor I need to measure human breath? When someone blows into the device I want to measure them blowing in and also sucking out. Could this be done with ...
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