| Electronics > Projects, Designs, and Technical Stuff |
| Logic level from comparator to raspi gpio |
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| PhelarNord:
Hi! Im doing a simple voltage monitor with a lm393. I´m going to use a raspbarry pi´s gpio´s to register the state of the comparator outputs but need some advice to translate the output from the comparator to 3.3v. Can i manage this with just a voltage divider or do i have to use something more solid. Cheers |
| Ian.M:
The LM393 has an open collector output. Simply use a 10K pullup resistor from its output to Pi +3.3V, and it will be logic level compatible. N.B. LM393 Gnd must connect to Pi Gnd. You can power its Vcc pin from Pi +5V. |
| PhelarNord:
Thanks! I´ll do this in the design :-+ |
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