This is a primer project which covers following concepts- 1.Power Supply.or 12v battery 2.DPDT switch operation. 3.DC Geared Motors 4.Basic motion of Robot There are following tools are required for this project- 1.Soldering iron 2.Hack saw/ blade 3.Screw drivers 4.Multimeter 5.Pliers 6.Wire stripper 7.Spanner 8.Hammer There are following components are required for this project- Battery (12 volt, 4.5 Ah) - 1 nos. DPDT Switch- 2nos. or 4 nos robot gripper Ribbon wire strip- 3 meters+ DC Geared Motors 4nos 4x4 or 2 nos 4x2 Chassis(having holes for motor) - 1 box 1 Metal strip 12 Wheels 4 nos. Castor wheel 1nos(4x2) Soldering wire - as required
PAPER PLANNING: Before you start making your robot you need a paper plan. Measure length of the motor (excluding shaft), diameter of shaft of the motor, inner hole diameter of the motor. Draw a rough sketch of the base you need to cut keeping in mind the placement of motors and wheels. Chassis Chasis is a mechanical assembly for making a 4 wheel drive platform.Where you can mount any controller board to drive your bot. This is just the mechanical chassis, Optionally as shown in the figure you can use 4 DC geared motors, 1 castor and 4 wheels with rubber rings so you can make both variants.
Step 3: Mechanical Assembly Fit the caster wheel at position show in above diagram with 1.5-2 inches (approx.) screw. Fit the dc motor into the holes of chassis and couple the wheel by using screw or rubber tube.
To make anti-clockwise motion of motor, the polarity of supply must be inverted of polarity of supply in clockwise motion. For "Polarity Reversal" DPDT switches are generally used. This can be done by using following circuit. DPDT Switch Connections for wired control The wire should solder on metal strip not on switches directly (as shown in fig 3). This precaution helps us if there is wrong connection occurs in circuit. So we can change the circuit by changing metal strip position (fig 4). The procedure is shown in figure below -
Step 5: Motor connections The motors are fixed to the chassis and the tyres are fitted to the DC Geared Motors 4x4 and 4x2 ! outdoor or indoor !! !
Step 6: Power Supply &12 battery The rechargeable battery of rating 12 Volt and 4.5 ampere rating should connected with remote switch and...you can 9v ! 8 pcs AA battery (12V) holder with on/off switch. The above circuit shows you how to connect the dpdt switchs to the motors and the 12V supply and by pressing the switch you can check the direction of the robot and change it accordingly. thus you are ready with your first LEVEL ONE WIRED ROBOT you can solar panel 12v without battery !
Step 7: Using robot control Before designing control wired we have to learn basic movement of robot which is shown in following table. Movements Motor1 (left) Motor2(right) For moving forward Clockwise Clockwise For moving backward Anticlockwise Anticlockwise For turning left Off Clockwise For turning right Clockwise Off CONTROLS :- The following switch positions will give you the respective movement. L-DPDT switch R-DPDT switch Movement TOP TOP Forward BOTTOM BOTTOM Reverse —nil—– TOP Left TOP –nil– Right TOP BOTTOM 360 right BOTTOM TOP 360 left
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