#Speedometer of a new bike: A #magnet (center) that is attached to the spokes of the wheel turn on and off the magnet switch( #reedswitch ,right), the speed is determined from the sense of time. Presented by teacher Jin Ito.
#Speedometer of a new bike: A #magnet (center) that is attached to the spokes of the wheel turn on and off the magnet switch( #reedswitch ,right), the speed is determined from the sense of time. Presented by teacher Jin Ito.