I need to be able to disconnect a power source (battery) when the voltage drops below a certain point which will usually be about 3v but it would be nice to be able to get down to .9 - 1v for when I'm testing NiCd and NiMH batteries. I need to test the capacity of a number of Lithium cells as well as some NiMH and I have a tester that draws a constant load (up to 180w) but it won't disconnect automatically if the V drops past a point, which I'd like to then put a circuit in line to take care of this.
I'm guessing 10A will be sufficient but probably wouldn't be a bad idea to be able to do 15A.
Does anyone know of a pre-made board that can do the voltage monitoring and then disconnect w/ a relay?
Someone suggested this device and it looks like it has some features I need (including the lower voltages I need) but it also looks like a charger. I'm also not sure what the 220v input is used for and would 120 work alright (I only have 120 & 240vac).
https://www.ebay.com/itm/Battery-Ch...ver-Voltage-Protection-Module-Sx/323727475189
I'm guessing 10A will be sufficient but probably wouldn't be a bad idea to be able to do 15A.
Does anyone know of a pre-made board that can do the voltage monitoring and then disconnect w/ a relay?
Someone suggested this device and it looks like it has some features I need (including the lower voltages I need) but it also looks like a charger. I'm also not sure what the 220v input is used for and would 120 work alright (I only have 120 & 240vac).
https://www.ebay.com/itm/Battery-Ch...ver-Voltage-Protection-Module-Sx/323727475189