Light Seeker
A simple robot I created for my newphew to put together. It has no code whatsoever, and purely works by letting both light dependent resistors drive the motors of the opposite side.
Wiring
Half the circuit is a Light dependant resistor making a motor spin faster when the light falling on the LDR is more intense.
The full circuit is twice that :-).
Components
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ball caster 2.3 EUR https://www.pololu.com/product/953
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2x micro metal gear extended back shaft 298:1 2x5 EUR https://shop.pimoroni.com/products/micro-metal-gearmotor-extended-back-shaft?variant=3073681089
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mini breadboard 2 EUR https://shop.pimoroni.com/products/colourful-mini-breadboard?variant=264820340
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AA battery holder 3 EUR https://shop.pimoroni.com/products/4-x-aa-battery-holder-with-on-off-switch
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analogue components+breadboard cables ca 1 EUR 2x BNC547C (npn transistor), 2x 100kOHM resistor, 2x LDR light dependent resistor
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moon wheels pair 4.5 EUR https://shop.pimoroni.com/products/moon-buggy-wheels-pair
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4x AAA batteries 7 EUR