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Results tagged with analogread
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user 20245
A standard Arduino function for measuring the voltage on an analog pin via ADC.
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How to drive Arduino UNO as a counter triggered by 555 timer's output (astable mode)
You need to create a finite state machine with 2 states:
Waiting for input from 555 to go high. When this happens increment the counter & advance to the next state.
Waiting for the input from the 5 …
- 7,470
3
votes
Arduino Uno Analog pot values are not smooth
There will always be noise in the output an Analog to Digital Converter (ADC).
An ADC converts a continuous-time and continuous-amplitude analog
signal to a discrete-time and discrete-amplitude digit …
- 7,470
0
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When should you worry about interference affecting the analog input?
Noise reduction involving Analog to Digital Conversions can be done in many ways. Common software solutions involve averaging multiple conversions. Exponential smoothing is one such method. One adv …
- 7,470
1
vote
Mixing analog reads with raw port reads
In general, most embedded processors multiplex external pins into specialized internal circuits. Circuits which check standard fixed threshold crossings (digital inputs), circuits which check variabl …
- 7,470
1
vote
Mapping values from analog input giving unexpected values?
Note that the Arduino function "map" is really this:
long map(long x, long in_min, long in_max, long out_min, long out_max) {
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min …
- 7,470
3
votes
Accepted
In the AnalogRead example, would the thing work if I remove or short the A0 and the ground pin?
I think you are confused because the ADC input measures voltage, not resistance.
To convert from resistance to voltage you need to pull in the opposite direction on the variable resistance with a f …
- 7,470
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LCD TFT 2.4"" changes the values of analog read of Arduino Mega
The short answer is to beef up your power supply:
Don't use small batteries or power supplies. For instance use D Size Cells instead of 9 Volt Cells. Or use a 3 Amp power supply instead of a 100mA …
- 7,470