Bill of Materials

Item	No.	Approx Cost
3D Print Camera bracket	x1	£0.05
3D Print Caster	x2	£0.35
3D Print Caster Spacer	x2	£0.61
3D Print Display Bracket	x1	£0.24
3D Print Fan Bracket	x1	£0.02
3D Print Head Fixing Bracket	x1	£0.30
3D Print Head Pan Bracket	x1	£0.19
3D Print Head Tilt Arm	x1	£0.30
3D Print IMU bracket	x1	£0.06
3D Print Imu bracket support	x4	£0.06
3D Print Push Button Bracket	x1
3D Print Rear Platform	x1	£0.85
3D Print Rear Platform Standoff	x4	£0.60
3D Print Speaker Bracket	x1	£0.08
3D Print Switch Bracket	x1	£0.11
3D Print Forward Platform	x1	£0.77
3D Print Forward Platform Standoff	x4	£0.13
16GB Miscro SD Card	x1	£8.00
2 Pole 5mm Pitch PCB Mount Screw Terminal Block	Pack 20	£1.45
21.5mm PVC Pipe (used for neck)		£1.89 for 2 metres
6-32 UNC x 5/16 inch Pan Head Screws (Head Bracket to Load Bearing Block)	x8
8 Ohm Speaker	x1
AA Rechargeable Batteries	x10
Adafruit Momentary Push Button 16mm Black #1505	x1
Adafruit Momentary Push Button 16mm Yellow #1502	x1	£1.00
Adafruit Mono 2.5W Class D Audio Amplifier PAM8302	x1	£4
Advanced Motor Bracket Mount (large)	x2	£7.98
Assorted 3-pin Female/Female cables
Audio lead	x1
Base - plywood board 340x180x8 mm	x1
Battery Holder (10 x AA)	x1	£3.00
Black Cable Ties 2.5mm	Pack 100	£0.79
Brass Motor Shaft Hub - 6mm	x2	£3.98
Load Bearing Servo block (Futaba)	x1	£26.78
Metal DC Geared Motor w/Encoder - 12V 122RPM 38Kg.cm	x2	£62
Micro USB Breakout Board	x2
Micro USB Power Cables	x2
Mini Bluetooth Keyboard	x1	£7.51
Miniature 5V Cooling Fan for Pi	x1	£3.50
Raspberry Pi 3 7" Touchscreen Display	x1	£60.00
Raspberry Pi 3, Model B+, 1GB RAM	x1	£34.00
Raspberry Pi Camera Board V2	x1	£24.50
Raspberry Pi Heatsink - Black	x1	£1
RC Servo Futaba S3003	x1	£7.00
RC Servo Futaba S3305 Heavy Duty Metal Gear	x1	£36.99
Resistor 270 ohm, 0.25W	x1	£0.11
Resistor 10K ohm, 0.25W	x1	£0.11
RPLidar A1	x1	£93.54
RPLidar USB Cable
Screw button head hex M2.5 x 16mm (fan bracket to Pi)	x2
Servo Motor Hitec HS-422	x1	£13.08
Single Row 40 Pin 2.54 mm Male Pin Header Connector	Pack 50	£5.85
SparkFun MPU-9250 IMU Breakout	x1	£14.00
Switch - Rocker single pole	x1
Switch - Toggle double pole	x1
Table Tennis Balls	x2	£1.34
Teensy 3.5	x1	£24.00
Teensy USB Cable	x1
Thunderborg - Dual 5A Motor Controller with DC/DC & RGB LED	x1	£37.00
USB Power Bank, 2 port (2.1A, 1.0A)	x1
Various general screws/nuts/standoffs
Velcro Straps
Veroboard - various
Wheel Pair in Black (105x50mm)	x1	£11.99

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