1Little Flash 2 Construction
We start with the pieces on the floor.
Next, we examine the schematic.
Solder the capacitors and on/off switch together. Place them in the capacitor holder.
Add the dc to dc converter to the switch side of the capacitor holder.
Solder leads to the lever switch.
Place the lever switch in the bumper bracket using 3mm screws and nuts.
Prepare the bumper to attach to the bracket--it will attach using 3mm screws that thread into the bracket.
Gather the wheels, servo horns and vacuum belts. Attach the servo horn using 3mm screws.
Place the "tire" (vacuum belt) on the wheel.
Drill holes and attach the bumper assembly to the frame.
Drill a hole and attach the caster bracket to the rear of the frame.
Insert the caster ball into the bracket.
Next, we modify the servo motors. Remove the screws from the backplate.
Remove the small "silver" screw (below the circuit board) that holds the pot in place.
Pull the pot straight out.
Cut the three wires and remove the pot.
Combine two 2k resistors. Solder the center wire to the connection of the two resistors.
Solder one wire to the end of a resistor and the other wire to the free end of the other resistor.
Tape the resistor assembly so that the resistor ends cannot make contact with anything else.
Insert the circuit board and resistors into the motor cavity. Screw the back on.
Using a file, remove the plastic nub on the servo mounting bracket.
Install the motors in the frame using 3mm screws and nuts.
Place the wheels on the servo shaft. Secure the wheels using the servo horn screw.
Route the wires between the motors toward the back of the frame.
Pull the wires through the hole in the capacitor holder and secure the capacitor holder using 3mm screws (holes will need to be drilled in the frame).
Solder two 1 Mohm resistors together. Add a wire from the center connecting point and insulate the assembly.
Solder one end of this assembly to "+ input" on the dc to dc converter. This device is used to monitor supply voltage and trigger the Arduino's onboard led when the supply voltage drops below about 4 volts.
Install the sketch for the Arduino (found in the files), then plug in all the wires according to the schematic and tie wires up for appearance.
Charge the capacitors, flip the switch and it will run just like Little Flash.