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Questions tagged [electricity]

Use this tag to indicate the flow of electricity at higher voltage than that used in Arduinos themselves. Examples can include having an Arduino use a relay to switch the electricity for a 120 Volt device like a fan or a light.

Use this tag to indicate the flow of electricity at higher voltage than that used in Arduinos themselves. Examples can include having an Arduino use a relay to switch the electricity for a 120 Volt device like a fan or a light.

57 questions
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How to measure electrical conductivity using Arduino?

I want to measure TSS (Total soluble salt) in the soil. I have found in some literature that, through measuring of electrical conductivity, it is much easier to measure TSS. So, I thought, If I can measure electrical conductivity, it might be…
Bappa
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6
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1 answer

How can Arduino control with a servo with only one wire?

I was playing with getting my servos to be on dedicated power, separate form the Arduino entirely, but obviously controlled by the Arduino. I originally had the ground of the Arduino joined with the - of the battery, but to my surprise my Arduino…
Alex Wayne
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5
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1 answer

Touching a capacitive button, non-mechanically

This is not about using a capacitive button to control an Arduino; it is the opposite. I would like to "touch" a capacitive button on another conventional device. There could be a way like actually moving a finger-like stick and touch the button,…
Damn Vegetables
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2
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1 answer

Circuit diagram interpretation and electrical flow

I'm new to Arduino and consequently, to circuits. I've been reading Arduino Robotics by Warren and this was a circuit present in the book. From what Warren has said, electricity in the circuit travels from the negative pole to the positive, BUT to…
Amber
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0
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2 answers

Proximity sensor without proximity sensor; is my hand magic, my competency crap, or my arduino fried?

here is a very simple circuit, with a LED between pin 2 and ground, and a loose wire in pin 8. Here is the sketch that was intended for use with a small 4-contact switch like these in every arduino starter kit : int yellowCIn = 8; int yellowCOut =…
pouzzler
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