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Programs to display information to LCD framebuffer
#4
I guess that cranking up the resistor values can also make the ADC line more susceptible to outside noise (from other nearby wires/traces). We discussed this stuff here, and there's also another method that could be interesting. Essentially you could put a mosfet in series with R2 (to ground) and then just turn on the mosfet whenver you want to read a sample. You could wire it so that it's only "on" when the unit is on, or you could wire it to a GPIO so that you could turn the circuit on, take a reading, and turn it off. Since you don't need the resolution to be super fine (like you could take a reading every 5 to 30 seconds or whatever), it would only draw power a small fraction of the time (using the GPIO method). Maybe that's worth considering.
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RE: Programs to display information to LCD framebuffer - by Flavor - 12-07-2018, 02:42 AM

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