Sabertooth Dual 25A Motor Driver User's Guide
Power terminals
0V and 5V
The 0V and 5V connections are
used to power and interface to low-
power control circuits.
The 5V connection is a 5V power
output. The 2x25 utilizes a 1 Amp
switching BEC to power the
onboard electronics as well as to
provide power to your receiver and
up to 4 standard analog servos. You
can power anything that requires 5V
straight from the Sabertooth 2x25.
There is no need for an external BEC unless you need more than 1 Amp. The BEC will work at
full rated output throughout the Sabertooth’s operating voltage range. You can use the BEC at
full capacity whether you are running 7V or 24V in.
The 0V connection is the signal ground for the Sabertooth. In order to receive input signals
correctly, it must be connected to the ground of the device sending the signals.
Using the 0V and 5V connections to power a radio receiver in R/C mode and potentiometer in
analog mode is shown in Figures 2.1 and 2.2. If you are using multiple Sabertooths running from
the same radio receiver, only one should have the 5V line connected.
Figure 2.1: Analog input using a potentiometer
powered from terminal 5V
Figure 2.2: R/C input using a receiver powered
from terminal 5V
The 5V terminal can be used to power small loads, like a
potentiometer or a radio receiver. The 0V signal must be
connected to the ground of the device generating the
input signal.