Apogee - Raspberry Pi Robot

thingiverse

This fantastic little robot is engineered to empower my students to mount their Raspberry Pi, connect it up, and program with ease. The small stepper motors may not drive him at high speeds, but he is very dependable and the battery life is impressive! The parts for this bot are easily accessible on eBay for under $50 (American). Designed for something as compact as the Up! Mini. Instructions I printed mine on an Up! Mini with supports in two prints (9 hours for the body and 3.5 hours for the wheels and sled). It is crucial to carefully calibrate the print bed and warm up the room because the body is prone to warping. I am currently working on a castor wheel for the back and new wheels that have a bigger diameter but less volume. You will need: A Raspberry Pi Model A+ or B+ (preferably running Wi-Fi) 2 x 28BYJ-48 stepper motors (with ULN2003 Driver test Module Board) 1 x HC-SR04 Ultrasonic Sensor 1 x PowerBank Portable USB Charger battery (http://www.ebay.com/itm/2600mAh-External-PowerBank-Portable-USB-Battery-Charger-iPhone-4S-5-Samsung-S4-/131405859536?pt=AU_MobilePhoneAccessories&hash=item1e98664ad0) 1 x Adafruit Perma Proto Bread Board (1/4 size) 4 x 5mm LEDs A bunch of female - female dupont jumper cables Some 2mm stainless steel pins A whole bunch of hook-up wire Some header pins Some rubber bands will give the wheels a bit of grip. A lot of solder and a whole lot of patience (the cables only just fit inside) Some helpful tutorials for programming the Raspberry Pi are: LED: https://www.youtube.com/watch?v=J9cEAGTLaC8 Stepper Motor: https://www.youtube.com/watch?v=Dc16mKFA7Fo (I found his wait time for the stepper motor needed playing with) Ultrasonic: https://www.youtube.com/watch?v=xACy8l3LsXI UPDATE: I have discovered that running the stepper motor controllers of their own 9V battery (which fits nicely under the pi) results in better torque and speed.