Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [conditioning]

39 questions
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Microcontroller input conditioning

I have the following circuit to condition signals reaching my microcontroller's pins. This circuit reads both digital signals in the range 0 to 30V, and analog signals in the range 0 to 3.3V. Components Explanation R2 and R3 are never populated…
Fotis Panagiotopoulos
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Battery Maintainers

I have a bunch of non-rechargeable batteries I've kept in stock & haven't used almost at all (almost fresh off the packaging). Like all tools/equipment I have, I expect them to last me as long as I live. Because I typically opt for my rechargeable…
Tempus Nomen
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Isolating low-current, low-voltage digital signals

I'm working with a battery-powered sensor that allows reading its measurements using two digital signals - a clock and a data line. The clock speed is abount 3kHz. In addition to those two signals, only battery ground and regulated 1.5V are…
Florian Ragwitz
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Signal conditioning for piezo shock-sensor digital input

I have a piezo element glued to a piece of material, and I want to get a digital signal (to drive an interrupt on an Arduino) when something strikes the material. So, there's a certain noise floor on this signal (mains hum, and general vibration in…
Toby Eggitt
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What is "conditioning of a capacitor"?

I got a flash for my DSLR camera: A mecablitz 52 AF-1 digital Canon with multi-language manual from here. In section 15.2 (page 187 for english), it states: 15.2 Conditioning the flash capacitor The flash capacitor built into the flash unit …
sweber
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Pulse signal conditioning with a LM311

I am trying to design a sensor to read the pulses on my electricity meter. The meter has 1 LED that gives 1000 pulses / KWh. Each pulse is 30ms in width. I am using a phototransistor and a LM311 to reshape the signal into clean 5V…
Dan Corneanu
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I want to start by doing a circuit analysis of the triferential subtractor

I want to understand the circuit of the triferential subtractor: in the context of Anderson loop based signal conditioning, found in this resource here. This is just an inverting amplifier with a voltage reference at the positive input…
Abeer
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Multiplex temperature signals through one conditioning circuit

I'm planning on designing a PCB that takes numerous analog temperature sensor input signals and convert them using an Analog to Digital Converter (ADC) to be read by a computer. The signals need to go through a conditioning circuit prior to being…
jmvk
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Why do designers use op-amps with fractional gains?

I often find designs like the following simulate this circuit – Schematic created using CircuitLab Where the gain is less than one (\$\ R_2/R_1 < 1\$) Why not simply use a resistive voltage divider? Beyond the inversion (which tends to be…
Edgar Brown
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How do I read a load cell just with this data?

I have a load cell (capability = 23 kg or 50 lb.) Its output is 2 mV/V. I have read that that means 2 mV per each excitation volt. The power connection of this load cell is +15V-GND, so 0.002 * 15 = 30 mV. I guess this is the maximum output that…
wertyu
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How to interpret the analog output of this humidity sensor?

I have been given a humidity sensor to work with and the only info I have is an AliExpress listing that says that it's based on the HR202L sensor. The datasheet of the HR202L shows that its resistance changes with humidity, and gives a table of…
k.h
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Digital input conditioning?

I'm designing a schematic with opto-coupled digital inputs (BNC). For better noise/ground loops immunity/reflections should I add 50 ohm resistors on both input lines, signal(+) and GND, along a filtering capacitor, and make GND1 in the attached…
Mr No
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Removing noise from the speed sensor of a motorcycle

I am trying to make a digital dashboard for a motorcycle using a Raspberry Pi, a display and some sensors. I am using this speed sensor. When I put the sensor on the axis of the motor wheel and run the engine, it shows random values even if the…
mina
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Is a resistor trimmer a good idea for adjusting the gain of an op amp circuit?

I'm designing this circuit to measure temperature with PT100. R10 must be calibrated to obtain the desired gain. I have thought of using a resistor trimmer to adjust the gain similar to the following: Considering that the humidity and temperature…
Fabián Romo
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How to condition a NTC of very low resistance?

I want to use a temperature sensor which changes its resistance. For 0 degrees celsius its resistance is 0.5325 ohms and for 40 degrees celsius it is 3.264 ohms. Obviously putting it in series with another resistance to produce a variable voltage is…
Fabián Romo
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