3 ms·

Actually... https://www.bricklink.com/v2/catalog/catalogitem.page?P=4758#T=C&C=1 https://www.bricklink.com/v2/catalog/catalogitem.page?P=4758... Before Mindsto

Actually... https://www.bricklink.com/v2/catalog/catalogitem.page?P=4758#T=C&C=1 https://www.bricklink.com/v2/catalog/catalogitem.page?P=4758... Before Mindstorms there was a 9V system. It was really basic though: batteries, lights, motors, sirens, and wires.

fenwick67 8y ago
The Mindstorms RCX used that same contact system and had light, rotation, and touch sensors as well.