These components can all be purchased very cheaply on ebay even shipped from the UK - £2 for the distance sensor,£2.50 for the battery, £3.50 for a motor and driver. And perhaps half that shipped from China.
A project log for LJBot 0.5 A 3D Printed Raspberry Pi Robot
A very low cost robot using an A+/Zero, 28BYJ-48 Steppers, ULN2003 Drivers and ultrasonic distance sensor
These components can all be purchased very cheaply on ebay even shipped from the UK - £2 for the distance sensor,£2.50 for the battery, £3.50 for a motor and driver. And perhaps half that shipped from China.
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