1. We will start out by wiring a metal
geared servo — capable of handling
7. 4 volts — to run directly off your
robot’s battery. It is important to run
off the main battery and not the
receiver power to avoid brownouts
and shutdowns in your robot.
2. Start by cutting the red wire attached to the servo. This is tricky because it is
the middle wire. You will leave the yellow and brown wires alone and attached to
the receiver plug. It is important to not cut or disturb the brown wire because it is
the ground. In order to have proper communication between the receiver and
servo, you need the ground and signal wires connected.
3. Next, join the red servo lead to a
female JST lead.
4. Prep two Finger Tech speed
controllers. Using a similar method
to what we used in Give Yourself a
Wedgie, strip the red and black leads,
and tin them with your soldering iron.
7. The black set of wires will only have
three wires in the joint, as opposed to
four in the red joint.
5. Now, join the two red leads on the controllers, then join the two black leads
together. Slip a piece of heat shrink over the two red and two black leads.
56 SERVO 04.2013
6. Solder all four wires together in one soldering joint, then slip the heat shrink
over the joint and use a lighter to tighten it. Repeat the process for the two
black wires from the controllers and the black wire on the JST plug.
8. Next, tin and solder the red and
brown leads from the speed
controllers, then tin the two motor
leads on the Silver Spark geared
motors. Slip a piece of heat shrink over
both the red and brown leads, then
solder the red lead to the positive tab
on the motor.