problems with sabertooth

peterwaller · Post by **peterwaller** » Sun Feb 27, 2011 12:07 pm

I suspect it is a problem with the battery voltage. Although they quote them as working from 6 -18v a 5 cell nimh battery will soon drop below 6V. I see in the technobots spec they quote them as usable with 6 to 12 cell nimh not 5 cells. When you quickly change from forward to back you are putting the maximum load on the battery and it is likely that the voltage will dip even more. Also unless the 5v regulator in the BEC is an LDO one(Low Drop Out) it is likley that the 5 v to the receiver is also dipping possible causing problems with that as well. I suggest you try either a 6 cell pack or a 2 cell LiPo.

haz · Post by **haz** » Sun Feb 27, 2011 1:05 pm

ok i will give that a go does any body know where to buy 6 cell nimhs as i don have enough individual cells to make another one

Jonny · Post by **Jonny** » Sun Feb 27, 2011 1:34 pm

you can buy the cells off component shop.

haz · Post by **haz** » Mon Feb 28, 2011 4:21 pm

i have decided to go lipo and will get a 180mah lipo from robot birds would it work with this charger?

http://www.component-shop.co.uk/

edit: its in lipo chargers its the second one from the top

Jonny · Post by **Jonny** » Mon Feb 28, 2011 5:38 pm

no, if you charge it with that you will get a fire

that charger pumps 800mah into a lipo (fine for 800mah or above). i'd recommend getting a digital charger as that will have an adjustable charge current. like the ones further down the page

haz · Post by **haz** » Mon Feb 28, 2011 5:40 pm

so your saying lipo+that charger=fire=bad?

kickboxer · Post by **kickboxer** » Mon Feb 28, 2011 5:42 pm

your good at adding harry

haz · Post by **haz** » Mon Feb 28, 2011 7:26 pm

i have decided to use a pro peak quattro charger where can i find a 12v power suply?

Jonny · Post by **Jonny** » Mon Feb 28, 2011 8:18 pm

how many amps do you need?

Simon Windisch · Post by **Simon Windisch** » Tue Mar 01, 2011 1:18 am

You could buy one, ot use an old PC power supply... Andy from Widow Twanky has some to give away.