Stepping down voltage from a battery

Mindcrime13

Jan 6, 2010
8
Im working on an airsoft replica and the issue im having is that the battery i have is way to powerfull but is the only battery that fits my replica propperly. The battery is lipo 11.1 volts, 1600mah, 20C i need to take the voltage down to at least 8 volts, i know that there is a formula to find what resistor i can use to step down the voltage but i really dont know, so any input , help is appreciated

Razorback64

Aug 13, 2010
2
Depending on the application, the industry uses one of the following three methods, listed below in the order of increasing power level:

1) A charge pump: lets the potential energy built up in a row of parallel capacitors then switches to connect the capacitors in series to add up the voltage.

2) A boost converter: lets the kinetic energy built up in an inductor then switches to discharge that energy to a capacitor to pump up the capacitor voltage.

3) A transformer: oscillates the DC to an AC, runs the AC through a step up transformer, then rectifies the secondary AC back to a DC.

Car Diagnostic Tools-CarECU

Last edited:

barathbushan

Sep 26, 2009
223
I would suggest getting a bread board and try some experimenting with voltage drops across the resisters and checking out http://www.wikihow.com/Calculate-Series-and-Parallel-Resistance

you cant use a resistor to drop voltage unless you know that the load current is constant !!
if the load demands more current then there will be a greater drop at the resistor , and this prevents the load from getting the required voltage

barathbushan

Sep 26, 2009
223
Depending on the application, the industry uses one of the following three methods, listed below in the order of increasing power level:

A transformer: oscillates the DC to an AC, runs the AC through a step up transformer, then rectifies the secondary AC back to a DC.

there is no such thing as a transformer oscillator !!!
if you run dc through a transformer , there is no change in flux , and hence Emf is not
induced , IN SHORT NOTHING HAPPENS

Sep 26, 2009
223

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