Hi, i'm trying to build the 40$ line follower robot , i've finished the electronics part , but i'm having so hard times with the mechanical part because none of the parts metioned in the tutorial are available with the same specs in where i live so i have to improvise , and i have a question about DC motors : i found a 6v DC-Motor but i think it have a very high RPM than the 100 rpm mentioned in the tutorial , i can't buy gearboxes even here , because that would be very expensive for me and geared motors available only as used parts from old copy machines !! so they are very big and miss axes usually !
So someone have any method to decrease the motor speed?
I've tried before adding resistors of 6.8 Ohm to the circuit and its not very nice idea