How to add our Digital Timer to your Pinewood Derby Practice Track
Pinewood Derby Track TimerGreat for tuning your pinewood derby car or holding your own races
Our hand held Pinewood Derby Track Timer is designed to be used with our practice track and track stand. Both single and two lane versions are available. The timer has a precision of .0001 second.
Available in one and two lane versions.
Includes 4 ft of our Practice Track sections for each lane. These sections have been pre-drilled for easy timer mounting.
You will also need one 9 volt battery and an overhead light.
Assembly Instructions (for single lane)
4. Connect the rest of the track sections (except the finish section) using the instructions that came with the track using the section with the start flag assembly as the first section.
5. Place the track on the track stand with the bolt in the starting track section resting against the foam track support.
6. Attach the start flag to the lower arm of the starting gate in the position shown using the supplied rubber band.
7.Rotate the start gate forward or back and adjust the position of the track until the start flag fits into the sensor slot. Make sure that the start gate is fully inserted into the top tube while making this adjustment.
8. The above figure shows how the Finish Sensor is to be installed and how it operates, each car crossing the finish line interrupts the overhead illumination from reaching the Finish Sensor located on the finish line in the middle of that car's lane.
9. The provided rubber tube allows the Finish Sensor (the phototransistors) to be easily inserted snugly within the large drilled hole. Gently insert the Finish Sensor (phototransistor) into the tube so that the end of the sensor with the lens is ¼” from the end of the tube. This will allow the tube to act somewhat as a tunnel to the sensor to partially shield it from light sources other than directly overhead Insert the sensor and tube from the underside of the track so that the top of the tube is flush with the top of the track. The body of each Finish Sensor should be positioned within its hole in the track such that the small transparent window is facing skyward. The extra length to each tube allows you to easily grasp it for removal when taking down a track for storage.
10. Clamp the cable to the track using the cable clamp that is already mounted on the track and tighten.
11. Attach the finish track section to the end of the track and place a book, piece of wood or other object under the track to allow clearance for the Finish Sensor.
12. Install a 9 volt battery into the back of the timer display unit.
13. Connect the cable from the start sensor to the timer display unit.
14. Mount an incandescent lamp directly above the finish line of the track to illuminate the Finish Sensor. Mount this bulb about 5 feet above the track surface. A ceiling light can also be used if bright enough and if placed directly over the sensor. Proper operation of the Finish Sensors requires good illumination on the sensor (when there are no cars over the sensor holes). Remember at the end of a derby, before taking your track down for transportation and/or storage, to remove the sensors and cables for their protection. Your track timer is installed.
You are now ready to read the operating instructions.
Always lower the starting gate into the Start Sensor and assure consistent overhead illumination at the Finnish Sensor before resetting the display to prepare for the next race.
When evaluating the effect of a modification or tweak of alignment to your car, always be sure to get more than one race time recorded to show its average effect. Sometimes the race time of your car can vary noticeably because the inside edges of the wheels bump into the sides of the track's guide rail differently with each race. So don't jump to conclusions about the success or failure of a modification on the basis of just a single race time. Instead, take several race times and average them.
This product has been discontinued.
Suggestions for timing your car can be found here.