RCLM KIT 1 CONVERT YOUR EXISTING LAWN MOWER

www.evatech.net
RCLM KIT 1
CONVERT YOUR EXISTING LAWN
MOWER IN TO
A HYBRID REMOTE CONTROL LAWN
MOWER
Rev 2
By
Evatech, Inc.
1/22/04
BILL OF MATERIALS
PART NO
FUTABA
RCLMBR01
DCMOTOR01
Alternator
Regulator
Battery
Wheels
Frame
Batt Holder
Rear Attach
DESCRIPTION
AM or FM Futaba radio, two channel - PISTOL
Dual Speed Controller
12VDC, 0.24 HP DC MOTOR
Alternator for 1975 Ford Pickup F100 4.9L
Voltage Regulator for 1975 Ford Pickup F100 4.9L
12Volt K-Mart Battery
DC Motor Wheels rear wheels
1" x 1/16 wall thicknes Square Tube (10ft)
6" x 1/8" plate (4 ft)
4" x 3/16 plate (3 ft)
QTY
1
1
2
1
1
1
2
1
1
1
Ave Price Total
$ 100.00 $ 100.00
$ 250.00 $ 250.00
$ 170.00 $ 340.00
$
50.00 $ 50.00
$
20.00 $ 20.00
$
25.00 $ 25.00
$
20.00 $ 40.00
$
20.00 $ 20.00
$
15.00 $ 15.00
$
15.00 $ 15.00
$ 875.00
ABTRACT
This document contains information that shows how to transform an
existing lawn mower into a hybrid remote control lawn mower. The
hybrid system described here delivers 50 Amps of 12 DC power.
There is enough power in this system to drive the two high torque DC
motors, the brain, or any other components. By making the hybrid,
one would never run out of electric power.
BASIC OPERATION
The complete unit has two main components, a radio transmitter, and
the hybrid remote control lawn mower unit.
The radio transmitter sends two signals for speed and direction. One
can purchased the radio unit at any hobby store. Make sure to ask for
one that uses FCC approved ground frequencies (75.410MHz,
75.430MHz, …., 75.990MHz). The radio has a range of
approximately 2000ft. Typical radios are the Futaba AM or FM two
channels, Pistol models. One can find these radios at any hobby
store or check the link below.
www.towerhobby.com
The hybrid remote control unit has a RF receiver in the brain. The RF
receiver picks up the two radio signals, and converts them into
electrical pulses (1mSec to 2mSec). The Brain receives these pulses,
calculates the speed, direction, and sends the correct voltage and
current to the DC motors. The brain, DC motors, and tires can be
purchased at the sites below.
www.evatech.net , www.robotpower.com, www.npcrobotics.com
The unit generates its own DC power from a 50Amp car alternator.
The gas engine provides the mechanical energy to move the
alternator via a belt connecting the engine shaft and the alternator.
The engine size can be any where from 4.5HP to 7.0 HP. Field
voltage needs to be applied to the alternator rotor, this would
generate a fixed electromagnetic field; then when the engine moves
the alternator at let say 1500 RPM, this alternator will be supplying 50
Amps of DC current. It is important to use a voltage regulator to
control the output of the alternator. The alternator and voltage
regulator can be purchased at the site below or any auto parts.
www.evatech.net
INTRUCTIONS
1. Build the frame as per picture 1 using 1” square tube.
2. Make the battery holder as per pictures.
3. Build the lawn mower attachment as per pictures.
4. Make an alternator holder and connected to the engine shaft
via a belt.
5. Make DC motor attachments to frame.
6. Make the Brain attachments to frame.
7. Make front wheels free to move as per pictures
8. Follow the electrical connections as per the diagram as per the
electrical diagram. Use #10 awg wire for the battery, use
#10awg for battery to alternator, and #14 for DCmotors and
voltage regulator.
WARNING
Before testing the unit, make sure there are no children or pets
around the area.
There is a possibility of interference if some one is using the
same frequency. To reduce the possibility of interference,
always display your frequency on the unit. Make sure the
batteries on the transmitter are charged before operation the
unit.
Make sure the radio you select complies with any of these ground
frequencies.
Approved surface frequencies good for car, boat, RCLMs, etc.
Channel
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
Frequency
(MHz)
75.410
75.430
75.450
75.470
75.490
75.510
75.530
75.550
75.570
75.590
75.610
75.630
75.650
75.670
75.690
75.710
75.730
75.750
75.770
75.790
75.810
75.830
75.850
75.870
75.890
75.910
75.930
75.950
75.970
75.990
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