BillyBot a Small 150mm Tall
Educational Robot Kit
for Elementary School + Builders

Buy the "PICAXE Solutions" Book to get the 3D Printer Files and Lessons
2nd Edition coming soon ... using the new RoboGuts™

  After you buy your book you are entitled to a .zip file of all the 3D printable part files in .STL format. Just send a copy of your receipt with the order number to Walt Perko and I will email you the part files after the purchase is validated.

First step is to print the robots plastic parts ... then paint them to your liking

Be sure the tie wrap goes through the holes with the insert face facing up so the long end of the tie wrap becomes a balancing spring.
Make sure you press the tie wrap snug up against the inner back of BillyBot

Now after connecting the motors you can insert the RoboGuts™ board into place.

Now it's time to get the battery pack holder /balance springs installed

Introducing the RoboGuts™ using your choice of ÁController chip or module
I use the PICAXE 28X2 for the eBook and Demo here because it has the built-in programming on the module.

Click here to see a large image of several chips & modules on the RoboGuts™ board

Adding the jumper wires for the PICAXE 20M2 chip, SpeakJet chip and amplifier onto the circuit board

Fit the circuit board into BillyBot body plugging in the motors to the 3-wire connectors.

Jumpered, programmed and tested we're almost ready for installation into the BillyBot body ...

Checking the fit for the front plate and RoboGuts™

Fixing up the wiring harness for the two 3-color LEDs, the battery power IN and power ON/OFF switch

The jumper wire kits are cheap and make good wiring for inside the BillyBot and other tight spaces.

After soldering the head top LED in parallel with the body LED wires then just add a heat shrink to protect the connections. It's easy.

Screw the servo horns onto the wheels and arms and neck

Be sure to add the tail skid!

Although the two 30mm holes look the same using a small knife scrape the hole on the inner plate a little until the speaker snaps into place and then the front cover just slightly covers the edges so the speaker cannot fall out of the robot.

Adding a small switch inline makes turning BillyBot ON/OFF easier than just plugging in the wires.

Another power switch solution uses either PINS or individual Sockets to plug into the ÁController board.
Glue (I use school glue) a 3-color LED into the top head piece.
After bending the LED leads about 90░ glue a 3-color LED into the front body piece.
The front body piece is then inserted into the front panel.

If you buy the book you too can get a copy of the printer files and program listings used for BillyBot and other robot projects ...

Remote Control System for BillyBot and other Bots

6-Channel Orange Radio Transmitter

6-Channel Orange Radio Receiver

Radio TX Battery

V-Tail Mixer

Receiver Battery Pack

- Autonomous BillyBot RoboGuts™ -

With this board you just add the chips you want to use and jumpers for the connections.

For those that want to save money on their autonomous BillyBot they can use this board to program a PICAXE 20M2 or PICAXE 20X2 chip to plug onto the BillyBot controller board.

PICAXE-20 Project Board

These chips are restricted to a 5V battery source
PICAXE-20M2 $3.50 . . . . . . . . . . . . . . . PICAXE-20X2 $6

The more versatile RoboGuts™ board that can use 7.4 (2S LiPo or 9V Radio Batteries) use the PICAXE 28X2 Module $20

Adding a SpeakJet chip, SparkFun audio amplifier and speaker;

The SpeakJet chip

SpeakJet Info

Where 2 Buy a SpeakJet chip

The SparkFun Audio Amp

SparkFun Audio Amplifier
Install two 10K Ohm 1/8W 1% resistors in parallel with output resistors on board for proper gain to hear your robot project talk 'n sing.

Install 1x2 and 1x3 header pins in the four positions on the board also ... I put some of my output pins sticking UP instead of down for some connections while others connections use the two parallel female header connector.

The 30mm 8 Ohm 2W Speakers
from the DigitalZone on eBay


UpDates & Additions to the BOM

3mm Snap Rivets - SNAP RIVET BLK 0.217"-0.256" - McMaster-Carr

Your donation can help to add more Sensors, 3D Printable Design Projects and Program Listings to the book