What would be the drawbacks to tapping the +/- 10v produced by a Max232 chip to power a comparator or two?
- posted
15 years ago
Steal power from a max232?
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- posted
15 years ago
Dont know about the comparators, but I have used the -10V for the contrast control for my 14-pin LCD display and it works well.
Allen
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- posted
15 years ago
The 232 chips are designed for a bit of cheating since they were created in the era of serial mice. If you can design your circuitry to run from a single positive supply, it is easier on the 232 chip. That is, the negative supply is just the positive supply run though an inverting charge pump, so the negative supply is softer than the positive supply.
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- posted
15 years ago
Mice are still serial! :)
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- posted
15 years ago
How about: You won't be able to get the MAX232?
I've powered op-amps from the generated voltages so a comparator should also work.