Timeline for INA219 measure voltage of battery with RPi
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 24, 2018 at 21:57 | vote | accept | Kliwer | ||
| Aug 23, 2018 at 18:54 | answer | added | Kevin Kruse | timeline score: 2 | |
| Aug 23, 2018 at 18:24 | history | edited | Kliwer | CC BY-SA 4.0 |
Added schematic
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| Aug 23, 2018 at 16:08 | comment | added | dandavis | you should be able to meause voltage with just one sense wire; you're using two and incorrectly; you're seeing the voltage drop over the resistor, but the INA can report voltage between gnd and the shunt side w/o current, even if that's not touted. | |
| Aug 23, 2018 at 15:30 | comment | added | Oldfart | @KingDuken The Raspberry Pi board has a 5V supply but the chip I/O banks are running from 3V3. The PWM output which comes from the GPIO is therefore only 3V3. | |
| Aug 23, 2018 at 14:25 | review | Close votes | |||
| Sep 9, 2018 at 3:05 | |||||
| Aug 23, 2018 at 14:16 | comment | added | user103380 | Raspberry Pi provides 5v PWM on its supply rails; it's not a PSU. Also consider creating your own circuit because this is extremely unclear. | |
| Aug 23, 2018 at 14:08 | comment | added | Kevin Kruse | There is a schematic on page 10 of the INA219 datasheet, figure 13. That shows the basic method of connecting the device to monitor your supply voltage and current. If you need to filter the signal, there is figure 14 on the next page. It's not clear to us how you have yours connected. | |
| Aug 23, 2018 at 13:28 | comment | added | brhans | What are those red & black lines in your question supposed to represent? If you edit your question there's a button you can click to draw us a proper circuit which might help. | |
| Aug 23, 2018 at 13:25 | review | First posts | |||
| Aug 23, 2018 at 14:27 | |||||
| Aug 23, 2018 at 13:16 | history | asked | Kliwer | CC BY-SA 4.0 |