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This small and simple Bot was mounted on a thin Foam Board Chassis, the Servos (Recicled due to internal PCB failiure) were modified to turn 360º and their internal PCB's were removed, (basically one ended up having two small and quite powerfull set's of motor+gearbox). The IR 'eyes' were build around a CNY70 IR Component. (Modules were designed and built by a robotic's colegue "back in the day", and given to me on a Robotic's challenge when our sensors "flat-lined":) Still got them and working ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/simple-ir-based-on-cny70-obstacle-avoiding-bot-picaxe-28x