Electronics > Beginners
How do I make an LED light up using a comparator?
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alsetalokin4017:
Looks like the noninverting input (3) is connected to the ground side of the RC instead of the top side?   Sure won't work right that way.

alsetalokin4017:
What's the value of the R5 resistor?

renzoms:
That doesn't sound right, to me. The IC has two inputs and one output on each side, both work the same, as far as I know. And as far as I know, there isn't difference in the sides where the GND pin is and the Vcc pin is.
james_s:

--- Quote from: renzoms on October 22, 2019, 12:13:30 am ---Well itt would have been damaged, or not damaged, if I connected it all of these ways, no? There's not a dice in there, rolling, and breaking the IC if it rolls a 6.

--- End quote ---

There kind of is actually. Some ICs are very tolerant of abuse like having their outputs shorted to ground or supply rails, some can tolerate it for a while but may eventually fail, others will let the magic smoke out instantly if this happens. I don't recall seeing mention of the particular IC being used but it's still worth connecting it correctly in order to find out.

Let us know what IC it is, also study the datasheet, make sure you understand how it works. It will say whether the output is open collector or not and it will list absolute maximum parameters.
renzoms:
It is a TLC372CP and someone told me The outputs are n-channel open-drain configuration
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