OPTION 1 - The Simple Approach
2 channel hobby RC transmitter and receiver
2 x standard hobby servos (usually included in
the transmitter/receiver deal)
1 battery pack to power receiver and servos
(usually included in the transmitter/receiver deal)
1 (or optionally 2) servo fail-safe units in case
of emergency. NOTE - these are not necessary, however at
least one on the forward/reverse servo is HIGHLY
RECOMMENDED in case the mower decides to run away,
chewing up the neighbours
dog in the process.
2 x 10k-ohm potentiometers (Jaycar
Part number RP-3510)
4 x 10k-ohm 1% 1/4W resistors (Jaycar
Part number RR-0596)
4 x 15k-ohm 1% 1/4W resistors (Jaycar
Part number RR-0600)
Cable to connect Interface to Wheelchair
controller (see details below)
Small Piece of 'veroboard'
to mount the resistors and wire onto (optional). See
Jaycar Part number HP-9550.
Alternatively, you can have a nice neat setup with my
Get the Schematic, PCB and Assembly details HERE
As per an RC car, the battery pack plugs into the power
socket of the receiver
Failsafe plugs into the forward/reverse channel (check
your transmitter if not sure). From there, the other end
of the fail-safe plugs into the forward/reverse servo.
If using 2 fail-safes, follow step 2 to install the
left/right fail-safe and servo. If no fail-safe is used,
just plug the servo straight into the receiver.
See the pic below for setup overview.
Click the pic for a larger
Mount your assembly inside a
sealed box and attach it to the controller. I'm sorry I
can't show you any pics of this setup because I never
built one. I went straight for the
With a voltmeter, determine the +12V and common pins on
the wheelchairs joystick connector. You may need someone
who's cluey with
electronics to figure where
to look. Then connect this setup straight to the
controller and you're done!