Spark Timer with 12v Plug

This ticker tape timer has everything you need, including necessary power supply. This timer is a time tested way for students to visualize distance, velocity, and acceleration versus time. Simply hook this to an inclined car on a ramp and you will get a visualization of acceleration caused by gravity, seen by the spacing between spots on the tape. A vibrating striker prints dots on the tape using carbon discs at an adjustable rate of 25 or 40 dots per second. The unit is housed in a durable, scratch proof, shock absorbing plastic case and uses a unique method of adjusting the position of the carbon disc. Comes with 100 Carbon Discs and one 50m roll of tape. Operates on 12 volts (adapter included).