the module did comes with a shunt resistor. maybe it use the shunt resistor and the 10k as a voltage divider and put out the output?
@JCA34F, all the resistor looks like 2k ohm, all of it. i don`t know how it works exactly it works but i might want to use it to control something when i pass different voltage
the VIN+ is from the wheel and the VIN- connected to the 10k resistor then to ground. here are the link that you asked
@JCA34F, i still have no idea what it was used as before, it got 3 pin and i just checked it to have all the same 2k resistor for each resistor. maybe you were right, it was been used to control a fan, but i do not know the fan size. i found it from one of my dads stuff. maybe it were cool if i were able to control a fan using it.
That will also work.
You need the resistor because the INA219 is measuring the voltage between VIN- and GND. Without a resistor, VIN- is just floating.
You can also connect the voltage between VIN- and GND, without the resistor.
it does works by using those resistor value. but im trying to figure out what other method i can use. maybe i will stick with ina219 as it use i2c and im also using other i2c sensor and display.
@cookie95
You should connect the voltage between VIN- and GND.
If you use the 1K, it will essentially be placed in parallel with the wheel resistor and affect your all your readings.