User Manual

Mode 2: R/C Input
R/C input mode is used with a standard hobby Radio control transmitter and receiver, or a
microcontroller using the same protocol. R/C mode is selected by setting switch 1 to the DOWN
position and switch 2 to the UP position. If running from a receiver, it is necessary to obtain one
or more servo type pigtails and hook them up according to figure 5.1. The built in 5V Switching
BEC will handle powering your receiver, microcontroller, or 3-4 standard analog servos with no
problem. If using a receiver pack or external BEC, do not connect power to the 5V line of the
Sabertooth to avoid back-feeding power and causing damage.
There are three operating options for R/C mode. These are selected with switches 4, 5 and 6.
Switch 4: Mixing Mode
When Switch 4 is in the UP position, Mixed mode is
selected. In this mode, the R/C signal fed to the S1 input
controls the forward/backwards motion of the vehicle. This
is usually connected to the throttle channel of a pistol grip
transmitter, or the elevator channel of a dual stick
transmitter. The R/C signal fed to the S2 input controls the
turning of the vehicle. When switch 4 is in the DOWN position, Independent mode is selected. In
this mode, the signal fed to the S1 input directly controls Motor 1 (M1A and M1B) and the
signal fed to S2 controls Motor 2.
Figure 5.1: R/C connection. Each pigtail is connected to 0V, 5V, and either S1 or S2.
An example connection would be the S1 pigtail to elevator and the S2 pigtail to
aileron.
R/C Mixed or Independent