belesa...
mas pelas informacoes que consegui , inclusive em forum gringo, vou ter que modificar o circuito p/ o corte ser aos 11,7v~12v como se fosse uma unica bateria de 4S certo?? ( já que vou usar 2 de 2S)
até consegui a explicacao segundo a tabela abaixo:
Start with a value for R1 that's greater than, but somewhere in the same general ballpark as the original design, which is 5.1K. Then if Vcutoff is the desired cutoff voltage, R2 is given by
R2 = 5 x R1 / (Vcutoff - 5).
Standard resistor values are powers of 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, and 91, so you'll have to fish around for a suitable pair of values. Here are a few of the combinations I've found so far:
4 cells, R1 = 8.2K, R2 = 6.2K, Vcutoff = 11.6 volts, or 2.9 volts per cell. 4 cells, R1 = 9.1K, R2 = 6.8K, Vcutoff = 11.7 volts, or 2.92 volts per cell. 5 cells, R1 = 9.1K, R2 = 4.7K, Vcutoff = 14.7 volts, or 2.94 volts per cell. 5 cells, R1 = 8.2K, R2 = 4.3K, Vcutoff = 14.5 volts, or 2.91 volts per cell. 6 cells, R1 = 10K, R2 = 3.9K, Vcutoff = 17.8 volts, or 2.97 volts per cell. 6 cells, R1 = 12K, R2 = 4.7K, Vcutoff = 17.8 volts, or 2.96 volts per cell.
You could also fine-tune the circuit by combining resistors together in place of R1 and/or R2 to get exactly what you want, and then rig up a test fixture to verify the result.
_________________ Fabiano - BH/MG Axial AX-10 - Kalango Axial AX-10 - Kamaleao HPI SAVAGE FLUX HP - El Diablo Venom Creeper - Aranha
|