TorC
Newbie level 3
Hi,
I am building a power-pack from old Nissan LEAF modules. To make sure not to destroy any of the cells in the 4S configuration I am using a "1-8S Lipo Li-ion Fe Battery Voltage 2IN1 Indicator Tester Low Voltage Buzzer Alarm For RC Car Boat LED 3.7-30V Dual Speaker" since they are very cheap, and very light. (I am using an external balancing charger).
My problem is that I can not turn this device off unless 4 out of 5 pins are disconnected. Even if I cut the ground the device will still be active. I want to just push a switch and turn the whole ting off.
Since this device will "buzz" at a set voltage, any significant voltage drop will cause it to not work as supposed. It is however possible to change the the setting on when the buzzer goes off, but not very much since the cells are nominell 3,7.
As of now I am using 5 relays to cut all power, but that should not be needed since only two of them are cutting the output power, and 3 cuts power only to the buzzer-device.
So is it possible to use MOSFETs to replace the three relays? If so, witch one?
I am building a power-pack from old Nissan LEAF modules. To make sure not to destroy any of the cells in the 4S configuration I am using a "1-8S Lipo Li-ion Fe Battery Voltage 2IN1 Indicator Tester Low Voltage Buzzer Alarm For RC Car Boat LED 3.7-30V Dual Speaker" since they are very cheap, and very light. (I am using an external balancing charger).
My problem is that I can not turn this device off unless 4 out of 5 pins are disconnected. Even if I cut the ground the device will still be active. I want to just push a switch and turn the whole ting off.
Since this device will "buzz" at a set voltage, any significant voltage drop will cause it to not work as supposed. It is however possible to change the the setting on when the buzzer goes off, but not very much since the cells are nominell 3,7.
As of now I am using 5 relays to cut all power, but that should not be needed since only two of them are cutting the output power, and 3 cuts power only to the buzzer-device.
So is it possible to use MOSFETs to replace the three relays? If so, witch one?