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Author Topic: Use a POT to control a time limit  (Read 716 times)
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I wanna use a POT to control the time of a certain function and for the life of me i can't work out how to get the POT to control the time could someone try to explain it to me (no code if you can help it)

Note; already read the "BlinkWithoutDelay" just wanna adapt it slightly
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Forget about the pot portion: can you control the time of a certain function?

Once you  have that figured out, try to read the pot's value and then use that value to control the time of a certain function.
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I don't think you connected the grounds, Dave.
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The analogRead will return a value in the range 0 .. 1023.
If this isn't a convenient range of values, you could use the "map" function to get it to more convenient units, or, as you did in your LED dimmer, just use simple arithmetic.

Plug the resulting value into the "interval" variable in blink-without-delay.
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The analogRead will return a value in the range 0 .. 1023.
If this isn't a convenient range of values, you could use the "map" function to get it to more convenient units, or, as you did in your LED dimmer, just use simple arithmetic.

Plug the resulting value into the "interval" variable in blink-without-delay.
that's what i ended up doing but not sure if it works (as i have no cable can't tell if it's working) and i don't wanna use interputs in my programme just yet
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You're over-thinking - user-defined interrupts are not part of this problem.
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Read the POT using analog in. Write or scale that value into the variable you use in your time delay loop.

No need for interrupts  or other complex processing. Every time through loop read the POT and update the variable with the delay time.
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Read the POT using analog in. Write or scale that value into the variable you use in your time delay loop.

No need for interrupts  or other complex processing. Every time through loop read the POT and update the variable with the delay time.
no idea how to scale that value, i've used "analogeRead" but doesn't work
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i've used "analogeRead" but doesn't work
And that means what exactly?
(The compiler expects you to spell it correctly, if that's what you meant)

Scaling usually involves an arithmetic function.
« Last Edit: November 13, 2012, 04:53:16 pm by AWOL » Logged

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i've used "analogeRead" but doesn't work
And that means what exactly?
(The compiler expects you to spell it correctly, if that's what you meant)

Scaling usually involves an arithmetic function.
using the "analogeRead()" read in the pot value, but i don't know what to devid the value by to get the scale right
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How do you normally divide something?
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How do you normally divide something?
by using " / "
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So what's the problem?
Did you read reply #2?
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