Questions tagged [op-amp]

An op-amp (operational amplifier) is a high gain analog voltage amplifier with differential high impedance inputs, and a low impedance output. A basic building block in signal processing, like as amplifier or active filter.

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Signal clipping in Arduino Serial Plotter

I would like to understand why did Arduino clipped the input signal as shown in the attached diagram? As far as I know, Arduinos are able to read analogue voltages up to 5v, that is 1023. But for some ...
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Mesure sensor voltage by 328p and OP Amp in parallel

I am designing a circuit to measure the temperature via a thermistor via the ADC pin on a 328p and I am looking for some advice. As a failover I am also using an OP Amp as a comparator, to see whether ...
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Reading ground signal from circuit

I am trying to detect whether a signal is high or low from an ESU LokSound 5 decoder for HO locomotives. My idea was to use one of the auxiliary pins used to drive an LED (AUX 3 in my case). The ...
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Arduino IDE on Attiny45: What kind of power does a chip need?

I have this little AtTiny45 which I'm loading a program with Arduino as ISP. My goal to use this chip along with a op amp, a piezo buzzer and a press button, and have it automatically sleep between ...
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What might be some reasons this MKRZero circuit and sketch fail to read frequency?

I've built the following circuit on my MKR Zero I've also uploaded, compiled and deployed the code from the associated article (https://www.arduino.cc/en/Tutorial/AnalogToMidi) with no errors. Note: ...