Most updated & more info at: eie3105p2.blogspot.com Soldering Sequence Resistor 560 ohm (R20) Green LED 3mm (D1) Photo-interrupters (U1, U2). They are in opposite orientation. Capacitors (C6, C10,C11,C12) Sockets 4-pin (J5, J6), Socket 7-pin (J7) Terminal blocks (J3, J4). Beware of the orientation. Battery holder. Check orientation Switch Other modules Ball caster Infra-red light panel (use M3 x 8 screws) Gear-box (38.2:1). Use two drilled gears in place of photo-interrupters (U1, U2). Wires connecting motor to PCB AWG#20 40mm in length for the end connecting to motor: stripped 2mm and tinned for the end connecting to terminal block: stripped 5mm, do not tin. solder wire to tab of motor. There is no need to push wire into eyelet of the tab. Wheel The construction of the wheels are different to the illustration provided by vendor. Please refer to the sample given. Mounting post for Control Board M3 x 10 screw + nut brass post M3 x 25
