A Picaxe 08m microcontroller controls the servo but you could use any type that you are familiar with.
Step 1: You Will Need These Items
- the goldfish template
- the gravel print
- micro servo
- 3-AA battery holder + batteries
- mini breadboard + hookup wire
- picaxe 08m microcontroller
- one 10k ohm resistor
- 100m of small diameter rod. aluminium, wood or plastic.
- plastic bowl. at least 150mm diameter and 75mm high.
You will also need,
- a knife to cut out the template
- double sided tape
- craft glue or pva
Step 2: STEP 1
Step 3: Step 2
They are double sided so you need to match them up first.
Step 4: Step 4
Step 5: Step 5
Start with one side and glue the tabs to the side of the body as you bend the center strip around to follow the curve.
It's best to glue them one at a time so you can make sure that the two edges fit together properly. It's a bit fiddly so take your time to get it right because a bad join ruins everything.
Once one side is done glue the other one down. Use a thin smear of glue on the tail halves and press them together, making sure that they line up.
Step 6: Step 6
The top fin only fits in one place, just make sure it is in the center and straight.
Step 7: Step 7
Step 8: Step 8
Make sure it is in the center and a little bit toward the front.
Step 9: Step 9
If you have not used a Picaxe before I suggest you visit this site, www.picaxe.com. And you can buy the chips and prototype boards from www.microzed.com.au or www.sparkfun.com.
I have provided the code that I used so you can cut and paste into the picaxe programming editor.
I used a mini breadboard instead of a hard wired circuit. It's easier and allows you to add sensors or extra servos very quickly.
As you can see the layout couldn't get much simpler.
Step 10: Step 10
I cut a small"x" in the center of the circle to allow the rod with the servo hub to pass through and onto the servo.
Step 11: Finished
Feel free to make any changes to the circuit and the code. You could have a light or sound sensor to change his actions or even have multiple goldfish.