Instructables
Picture of Robotic Bird
RB - 0.2 mm Wire.jpg
RB - 2 mm Wire.jpg
RB 5 - No 3 Attach Power Supply.jpg
RB 5 - No 4 Attach Battery.jpg
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)
 
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Step 1: Assemble to gearbox

Picture of Assemble to gearbox
RB 1 - No 1B Gear Kit Box.jpg
RB 1 - No 2 Motor Pack.jpg
RB 1 - No 3 Gears.jpg
RB 1 - No 4 Plastic Parts.jpg
RB 1 - No 5 344to1 Gear Ratio.jpg
RB 1 - No 6 Screw Driver.jpg
RB 1 - No 7A Assembled Gear Kit.jpg
RB 1 - No 7B Assembled Gear Kit.jpg
Assemble to gearbox. Choose 344.2:1 gear ratio, which is maximum power and lowest speed.

Step 3: Create the body of the bird

Picture of Create the body of the bird
RB 3 - No 2 Bird With Gear.jpg
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

Picture of 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

Picture of Make the circuit
RB 5 - No 1 Connect the Circuit.jpg
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

Picture of Attach the relay
RB 5 - No 2 Connect Circuit to Relay.jpg
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.
diyelectronics (author) 1 year ago
There are contact sensors triggering the flip-flop circuit. Please look closely at the circuit.