| Electronics > Beginners |
| HOW TO SENSE 12 VOLT DC VOLTAGE USING MICROCONTROLLER? |
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| Raj:
Yup,its a cultural thing. People don't play attention to the important parts otherwise. It's origin? our schooling system I guess. The textbooks are huge but the parts students are supposed to learn are one or two lines per page,made to underline by our teachers. I still used to read the whole book |
| Raj:
--- Quote from: Hero999 on July 06, 2018, 09:27:45 am --- --- Quote from: BravoV on July 06, 2018, 08:37:18 am ---Raj n Kumar, why Indians love to use eyes blinding text all the time ? Not only you two, but I have seen too many at various forums as well. Is it a cultural thing ? As common netiquette, its like shouting out loud when talking, everytime. :-// --- End quote --- Perhaps their love of eye burning text is linked to their taste for mouth burning spicy food? Anyway, I recently posted this schematic in another thread. It converts a voltage ranging from 10V to 15V to 0V to 5V, which can be read from an MCU ADC pin. https://www.eevblog.com/forum/projects/mesuring-a-12v-lead-acid-battery/msg1644677/#msg1644677 --- End quote --- Interesting...I would have taken a way expensive route with negative voltage or ground isolation from input,making input ground, -10+diode drop equalvant and a diode at input, or simply use 16 bit mode adc ( there's an article on microchip's website on how to do that on 10 but atmegas without external adc) |
| Raj:
Hey orignal post author, If I am guessing correctly,I think you are trying to make a car voltmeter or a battery monitor of some sort,right? |
| wabhavkumar:
Hello all, can anyone suggest, below attached circuit diagram can work or not? if not, please suugest pc817 optocoupler circuit for sensing 12 volt using microcontoller. |
| Raj:
This will work |
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