Timeline for Measure lipo voltage while powering arduino
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Jan 3, 2020 at 13:01 | comment | added | Duncan C | Yes, although the variable load on the battery will cause the voltage to drop, throwing off your measurements. | |
| Jan 3, 2020 at 10:21 | comment | added | Robbe | And then I connect the positive wire of the battery with a voltage divider to an analog input and I can measure it? | |
| Jan 2, 2020 at 23:24 | comment | added | Duncan C | That's OK, until you forget to disconnect the power supply and hook up a USB cable to update your code and possibly fry the Arduino. | |
| Jan 2, 2020 at 23:03 | comment | added | Robbe | Why wouldn't I just feed it to the Vcc? I'm only using one power source. | |
| Jan 2, 2020 at 22:48 | comment | added | Duncan C | Step up your lipo voltage to 5V, cut a USB cable (One with the square end that plugs into an Arduino), and feed the 5V into the red and black wires of the USB cable. Then plug that USB cable into your Arduino. When you do that it feeds the 5V into the Vcc pin, through a switching circuit that intelligently selects between power sources. | |
| Jan 2, 2020 at 15:16 | comment | added | Robbe | So I step it up and feed it into the Vcc pin or the raw pin? | |
| Jan 2, 2020 at 15:01 | comment | added | Duncan C | On one of my projects I cut a USB cable and fed my regulated 5V into the USB input. That way you take advantage of the input switching circuitry on the Arduino. | |
| Jan 2, 2020 at 14:59 | comment | added | Duncan C | No, there's no need for that. Step up to 5V, and then feed that into the 5V input of the Arduino. If you step up to 7.5V and feed that into the Arduino's VIN, it will just regulate the already-regulated 7.5V back down to 5V, turning 2.5v to heat. | |
| Jan 2, 2020 at 13:46 | comment | added | Robbe | But better is a step up to 7.5V then? | |
| Jan 2, 2020 at 13:37 | history | answered | Duncan C | CC BY-SA 4.0 |