This project shows you how to make a robotic bird that drinks water.
You will need:
- gear box kit
- 2 mm wire
- 0.2 mm wire
- 9 V battery
- used 1.5 V battery or adjustable power supply (not over used because you still need some power)
- 9 V DPDT relay (12 V relay can work with 9 V if it is new)
- two 2N2222 or BC327 transistors
- two 2N2907A or BC337 transistors (you can use a TIP41C power transistor to drive the relay instead of 2N2907A/BC337)
- two 2.2 kohm resistors
- four 22 kohm resistors
- one 220 kohm resistor
- one1N4002 diode
- soldering iron
- wires (many colours)
Step 1: Assemble to Gearbox
Assemble to gearbox. Choose 344.2:1 gear ratio, which is maximum power and lowest speed.
Step 2: Creat the Stand for the Bird
The stand is made mostly from 2 mm hard wire. It is 10 cm long, 10 cm wide and 16 cm in height.
Step 3: Create the Body of the Bird
The bird is 30 cm in height and made mostly from 2 mm hard wire.
After you make the bird you attach it to the gears from 0.2 mm wire.
Step 4: Attach the Bird to the Stand
Attach the bird to the stand with 0.2 mm wire.
Step 5: Attach Electronic Terminals
Attach the front and back terminals. The back terminal is made from 0.2 mm wire bend in the shape of half circle (please look closely at the image).
Then attach the 2 mm wire to complete to front terminal.
Step 6: Make the Circuit
This is a flip-flop circuit that controls the relay.
The "bird front" is the front terminal.
The "bird stand" is the back terminal connection.
Step 7: Attach the Relay
The relay does not have to be a high current relay. In fact is must be a low current relay. However, keep in mind that the motor will draw high currents if it stops. This is why you should not use transistors to drive the circuit.
Step 8: Connect Power
A used 1.5 V battery will give about 1 V which is just right amount for the motor. However, you can set the power supply to 1 V.
Keep in mind that the voltage must be 1 V when connected to motor. When you connect the battery to voltmeter without the motor you will see a higher voltage because of internal resistance of the battery.
The project is now complete.
This is how the bird should look like in video:
Motor at 0.5 V:
Motor at 1 V:
Motor at 1.5 V: