Hi All,
I'm slowly gathering 18650's here in the uk. while testing them, the ones that are not up to scratch are to be used in other projects. For example my daughters remote control car.
At present it uses a 9.6V ni-cd 1000mAh pack which is dead in 4-6 minutes at present.
So i want to replace it with a 3s 18650 pack - i have some high c dyson cells which i will be using.
I have the 3s bms which outputs 10a, and with charged cells i have an output of 12.4v as expected.
Question i have is how do i drop from from 12v to 9.6v and 7.2v? I tried the following buck converters, but it seems to only output upto 4.65v. Do i need to go bigger in s to get higher voltage to be able to produce my 9.6 and 7.2v?
https://www.ebay.co.uk/itm/MP1584-A...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649
Can anyone provide me with a link to something else that can drop the 12v from bms to 9.6v and 7.2v?
PS - no idea why the car uses both 9.6v and 7.2 - the battery pack it came with is wired with three wires - one is 0v, then one is 7.2v and the other is 9.6v as does the board on the receiving side in the car. maybe its used for the signal side/lights etc, while the 9.6v is used for motors?
I'm slowly gathering 18650's here in the uk. while testing them, the ones that are not up to scratch are to be used in other projects. For example my daughters remote control car.
At present it uses a 9.6V ni-cd 1000mAh pack which is dead in 4-6 minutes at present.
So i want to replace it with a 3s 18650 pack - i have some high c dyson cells which i will be using.
I have the 3s bms which outputs 10a, and with charged cells i have an output of 12.4v as expected.
Question i have is how do i drop from from 12v to 9.6v and 7.2v? I tried the following buck converters, but it seems to only output upto 4.65v. Do i need to go bigger in s to get higher voltage to be able to produce my 9.6 and 7.2v?
https://www.ebay.co.uk/itm/MP1584-A...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649
Can anyone provide me with a link to something else that can drop the 12v from bms to 9.6v and 7.2v?
PS - no idea why the car uses both 9.6v and 7.2 - the battery pack it came with is wired with three wires - one is 0v, then one is 7.2v and the other is 9.6v as does the board on the receiving side in the car. maybe its used for the signal side/lights etc, while the 9.6v is used for motors?