Introduction: Whistle Controlled Robot
This robot is completely guided everywhere by whistle, much like the "Golden Sonic Toy" made in 1957.
When switched on, the robot moves in the direction indicated by the illuminated arrow on the front drive wheel mechanism. When the whistle is blown, the front wheels rotate. Stop blowing the whistle and the machine will resume moving in the direction indicated by the arrow.
The drive motor in forward mode moves the robot, in reverse mode it rotates the drive wheel assembly. To make all this operate, two "one way bearings," a slip ring, sound detector and SPDT relay are required.
(2) One way bearings
(4) belts for wheels
(2) holders for 4 AA batteries
(8) AA batteries
1/4 inch plywood--10 inches by 15 inches
(4) red led
2 microfarad capacitor
(2) 10K resistor
(2) bearing--6mm I.D., 19mm O.D.
Print the 3d parts and prepare to construct the robot.
Insert a one way bearing into the drive wheel assembly.
Place a belt on the free turning (one way) drive wheel.
Place a belt on the motorized drive wheel. Attach the motor and solder small gauge wire to the motor.
Insert the wheels into the drive assembly.
Thread the upright shaft into the drive assembly.
Cut the base out of a piece of 1/4 inch plywood.
Insert bearings into the rear wheel assemblies. Insert wheels into the bearings.
Screw the rear wheels onto the plywood.
Wire the arrow according to the schematic.
Attach the arrow to the rotating base. I melted the two together using a soldering iron--glue would work as well.
Insert a one way bearing into the bearing holder. Screw the bearing holder to the plywood base.
Insert the wheel assembly into the bearing holder.
Attach the slip ring to the slip ring holder.
Push the wires through the upright shaft and attach the slip ring holder to the bearing holder.
Attach the wires to the diode bridge.
Wire the microphone and amplifier circuit on the breadboard. Attach to the Arduino and load the sketch.
Wire the on/off DPDT switch and attach to the back of the base.
Attach the battery holders, relay and Arduino using velcro.
Flip the switch on and you will have a (noisy) sonic controlled robot.
Runner Up in the