10 V 1000ma Rechargable Battery

azmax100

Hi all.

I just want to ask wethere I can use 10V 1000ma rechargable battery
with my Boe Bot. The normal 4 AA battery drain so fast.

·

Paul Baker

Hi Azmax,

In order to make your BOE-BOT run longer, you want to raise the current capacity (the mah rating), not the voltage. To make it easiest on you, I would suggest finding 4- 2500mah·NiMH AA batteries (or so,·each manufacturer has a slightly different mah value, but as long as its >2000 you should see an improvement) and an appropriate charger for them. This should do the trick without you having to modify your BOE-BOT.

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Paul Baker
Propeller Applications Engineer

Parallax, Inc.

Post Edited (Paul Baker (Parallax)) : 10/8/2006 3:59:26 AM GMT

Mike Green

You probably would damage your servos with a 10V battery pack. They're designed to operate with a 4.8V to 6V power supply and the regulator on the BOE doesn't work with less than about 5.5V (it can't regulate below that point). You can buy or make a rechargable battery pack with 5 rechargable NiMH batteries that would yield about 6.2-6.5V. There are also rechargable battery packs with 6 cells that yields about 7.2V. They'll work, but can shorten the servo's life a little because of increased arcing in the motor contacts with the higher voltage.

These battery packs are usually used for R/C vehicles.

metron9

Perhaps add a diode in series to drop some of the voltage if you use the 7.2V pack?

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Think outside the BOX!

Randy Evans

Actually, the B.O.E. schematic calls for Vin at 6-30 volts. (it has a 9-volt battery clip on board) Just make sure the jumper between X4 and X5 is in the default position.It selects the servo voltage at either Vdd (5V regulated) or Vin (battery unregulated).

Randy