I need a low voltage circuit that will take the input from a 3 cell LIPO battery and when the voltage gets down to 9 volts it will cutoff. The circuit needs to handle about 2 amps.
I have googled and searched and found a few commercial products that I can buy, BUT the amp ratings are way too low.
I have read that this can be accomplished with just a single zener diode, but have not found anything that says exactly how to wire it. Also where would one get a Zener diode that can handle 2 amps?
Everything including the LIPO battery needs to fit in a space the size of this:
http://outdoorpowertoolsaccessories-...9000-9-6v.html
I would like to convert my old Makita to run on a LIPO. I have seen other people do this, but they all just connect the battery directly to the Makita. this means that I have to guess when the battery is low and stop using it. Since LIPO's do not like to be discharged below 2.7 volts per cell, I need a cut off that is 9 volts or 3 volts per cell.
No I will not be using the old battery cartridge to hold the LIPO.
No I will not be using the NICAD charger to charge the battery.
All the circuit needs to do is cause the drill to drastically drop power so I know when to trade out the battery.
I have googled and searched and found a few commercial products that I can buy, BUT the amp ratings are way too low.
I have read that this can be accomplished with just a single zener diode, but have not found anything that says exactly how to wire it. Also where would one get a Zener diode that can handle 2 amps?
Everything including the LIPO battery needs to fit in a space the size of this:
http://outdoorpowertoolsaccessories-...9000-9-6v.html
I would like to convert my old Makita to run on a LIPO. I have seen other people do this, but they all just connect the battery directly to the Makita. this means that I have to guess when the battery is low and stop using it. Since LIPO's do not like to be discharged below 2.7 volts per cell, I need a cut off that is 9 volts or 3 volts per cell.
No I will not be using the old battery cartridge to hold the LIPO.
No I will not be using the NICAD charger to charge the battery.
All the circuit needs to do is cause the drill to drastically drop power so I know when to trade out the battery.
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