Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials 

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Thanks for explaining how to read the spec sheet on that point. Very informative

Thank you. Simply explained and brilliant. The penny dropped for me. Thank you

This is really great stuff. The concept applies even outside of Arduino.

Thanks for this,love your tutorials !!

That datasheet explanation was useful.

hey Michael, that was a very good tutorial, I had no idea that the arduino was that sensitive to the high and low state. not to mention that some where in the middle it's so iffy, it can go either way. Robert is right you didn't show how you connected to pin 2, it would be good if you could send him a reply on how you connected it. thanks mk

Hi Michael many thanks for all your informative videos.Your explanations are easy to follow JCB

8:46: Just a quibble, but the analog sensorValue is multiplied by (5 / 1023) to give voltage. Wouldn't it be more intuitive to first divide it by 1023 to give its value as a proportion of the max reading and multiply *that* by 5? Also, since sensorValue has 1024 possible values, it makes sense to use that instead of 1023. And since sensorValue is 0-indexed, it should be incremented by 1 to get the voltage: voltage = (sensorValue + 1) / 1024 * 5 Computing this verifies it is correct. Inputting 511 (the middle sensor value) gives exactly 2.5: 2.5 = (511 + 1) / 1024 * 5

A lot of thanks.🙌

Not working here,digital pin 2 bounces between 0 and 1 whatever the voltage (UNO R3)

No diagram showing applying voltage to pin 2. Did you just connect a jumper between analog pin 0 to digital input pin 2? Or does there need to be a resistor? Also, what is the proper value of the potentiometer? (I'm a newbie...)

Thank you!

Thank thank you \ \ ●● } {

he has rdj's voice

"adruino"? Are you worried about trademark infringement?