Reset pin on BS2p24 [Archive]

Spiral_72

01-30-2010, 03:23 AM

A real quick question:

The manual did not mention a resistor, while a search in these forums give me nothing.

Should the Reset pin be pulled low through a resistor, or is a button straight to ground acceptable?

A 100k did not reset, I tried several other values leading up to the 1k I have in there now. Is this resistor required? I've not noticed an ill-effect jumping it straight to ground, but I don't want to damage anything.

allanlane5

01-30-2010, 03:40 AM

I'm pretty sure a button straight to ground will work -- though probably you want to make sure it has a 1K ohm resistor pulling it up to Vdd as well.

Spiral_72

02-02-2010, 01:07 AM

Ah, really? OK, I'll pull it straight to ground and move the 1k resistor to the Vcc line.

Thank you.

dandreae

02-02-2010, 01:40 AM

You'll want to use a 4.7K or 10K for pull-up resistor and then straight to ground.

Dave

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Dave Andreae

Parallax Tech Support·

allanlane5

02-02-2010, 02:17 AM

I'd follow Dave on this one, were I you.

Spiral_72

02-02-2010, 04:45 AM

Very well then, I'll use the 10k.

I thought I'd read the entire manual for this little guy, and I did not know about the pull up resistor.

I should have known regardless. otherwise the reset pin is hanging off susceptible to noise. Guess I didn't consider it before.

Thanks fellas, for answering the question and for the extra info there.