Old Pueblo Engineering Center
Founded 2006 in Tucson, AZ. to explore Human/Robot Interactivity
“Drilling Brains for a New & Better Use of Technology”
Patents Pending


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Parallax BS2 module . . . . . PICAXE 28X2 module . . . . . RoboGutsArduino

PICAXE 18M2 chip . . . . . PICAXE 20M2 chip . . . . . PICAXE 28X2 chip

SpeakJet Home Page . . . . . Phrase-A-Lator Software


Ready-2-Play Robotics
5t4nd1ng @ th3 3dg3 0f 5p3ct4t10n!

Give a child a toy and they're happy for an hour.
Teach a child how to make their own toys, and they're happy for life!


Don't just learn the Programming Board, learn a chip or module!

You can find all the programming code on the internet, but buy a RoboGuts™ Kit and get all sorts of reference code in one place!

Here you see how a chip/module connects to the RoboGuts™ circuit board so you can build projects in one day.

PICAXE 28X2 Module/RoboGuts
Following info was obtained from the PICAXE Product Details Page

A compact PICAXE-28X2 module which contains the popular PICAXE-28X2 (PIC18F25K22) chip, voltage regulator, download socket, and reset switch in a convenient 28-pin, 0.6" wide, format. Supplied as an assembled and ready to use module it is ideal for breadboarding work but will also find a suitable place in other projects.

This 28X2 module supports up to 22 inputs/outputs with 16 analogue/touch sensor channels with an operating speed up to 16MHz using an internal oscillator and 64MHz using an on-board resonator. This chip supports 4 internal and up to 32 external program slots and is capable of acting as an i2c slave device.

The 28X2 supports enhanced features such as configurable i/o pins, ring tone music and touch sensor inputs, i2c, spi and high-speed serial with background receive. Scratchpad memory plus separate Data EEPROM and Data Table are supported. See the specification tab for more X2 series information.


Lesson 00 Power IN

JP8 is tied directly to the Battery IN V+/Vin male header top left of RoboGuts™ circuit board above JP6
Power IN for the PICAXE 28X2 module is 7V-12V DC
Page 36 PICAXE Manual1.PDF

Various ways to power the RoboGuts™ circuit board
Lesson-00-4.5V-5V ... Lesson-00-7V-12V ... Lesson-00-LM7805 + 6V-12V



Before you go any further, make sure you have the PICAXE Editor

and a PICAXE DownLoad Cable AXE027


Lesson 1: LED ON & OFF


Lesson 2: 3-Color LED ON & OFF, Multi-Colors


Lesson 3: Momentary Switch ON & OFF


Lesson 4: DS18B20 Temperature


Lesson 5: BS-170 FET & Laser Module


Lesson 6: PC Speaker Sounds & Music


Lesson 7: Piezo Speaker Sounds & Music


Lesson 8: Rogue Robotics µMP3


Lesson 9: Parallax Emic2


Lesson 10: SpeakJet chip


Lesson 11: Acceleration Module ADXL335


Lesson 12: Light Dependent Resistor or Photoresistor


Lesson 13: IRR IR Receiver


Lesson 14: Parallax PIR


Lesson 15: IR LED


Lesson 16: SHARP GP2D12 IR Range Finder


Lesson 17: Parallax PING Ultra Sonic Range Finder


Lesson 18: SRF-05 Ultra Sonic Range Finder


Lesson 19: SRF-04 Ultra Sonic Range Finder


Lesson 20: Standard Servo Motor


Lesson 21: Continuous Rotating Servo Motor


Lesson 22: L293D Motor Driver H-Bridge


Lesson 23: EasyDriver Stepper Motor Driver


Lesson 24: UNL2003 Stepper Motor Driver


END Main Lessons


BEGIN the 3D Printable Robot Projects

Project X0 = Singing 'n Dancing miniFloppyBot


Click on the picture above to see the programming code

Body box, 2 Wheels, Top, Skid and Face ... the whole kit can be 3D printed on most printers in one day.

Learn how to build the bots

B.0 = RWheel, B.1 = LWheel B.7 = Red LED, B.6 = Green LED, B.5 = Blue LED C.0 = Talk & Song


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ALL the .STL part files are waiting for KickStarter campaign to be funded.
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Project X1 = Cave Explorer miniFloppyBot


Body box, 2 Wheels, Top, Skid and Face ... the whole kit can be 3D printed on most printers in one day.


Only 1 rubber band on 1 wheel for traction is why the bot
falters a little in the normal programmed operation,
but it is easily seen how the program works in the demo video.

ScardyBot ... Turns to Run Away
increase the turn radius of X0 closer to 180° to run away

ScardyBot ... Turns to Run Away
increase the turn radius of X0 closer to 180° to run away


Flip the direction and now you have a Psuedo SumoBot that goes after whatever is close!

Finds something in range and tries to stick to it like a poopie on your shoe!


Project X2 = PIXYbot

The PIXYbot is a miniFloppyBot with a RoboGuts™ and a PIXY CMUcam5.
The bot sees a color, displays the color in its body 3-color LED and speaks about the color it sees.

. . . . . . . . . . The one caveat to this is you need to have good lighting and bright colors for this sensor to see and
. . . . . . . . . . recognize colors correctly. Color lights and bacck-lit objects do not work with the PIXY CMUcam5.


Project X3 = Skully ... The Head of the Grim Reaper

A Skull that moves its Jaw and Turns its Neck while it Talks



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ALL the .STL part files are waiting for KickStarter campaign to be funded.
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Project X4 = Build a BillyBot Talking, Singing & Dancing Robot




Easy to build other than painting the parts and soldering up the audio amplifier PINs.


The RoboGuts™ are so simple!

B.0 = Neck, B.1 = RArm, B.2 = LArm, B.3 = RWheel, B.4 = LWheel
B.7 = Red LED, B.6 = Green LED, B.5 = Blue LED
C.0 = Talk & Song


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ALL the .STL part files are waiting for KickStarter campaign to be funded.
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Project X5 = Build a miniFloppyBot with OLED Eyes

Designed for the PICAXE 28X2 module with enough memory for all the movements, although smaller chips can still make movable eyes.


Project X6 = R2Pv1-OmniRover1


Project X7 =



(Currently looking for online retailers to provide more affordable RoboGuts™ Lesson Kits Lesson Kit Components List)


ITMT; What Components and Where to Buy them


Donate to the cause and help take this another step forward!