We need to add the sensors under the track for the start line.
Also we will be adding a sensor so that we have a pit area ( a stretch of track) rather than trying to stop ON the start line.
Next we twist the wires together (I didnt want to solder and risk ruining the sensors
apply heat to shrink the tubing.
This results in a pretty good joint.
Do the same for the Infrared LED.
The Infrared LED emits the light that the sensor picks up and the beam gets broken by the paddle under the car that fits into to slot in the track and guides the car.
Now both the sensor and Infrared LED are ready for the track
I had initially come up with a design for sensor mounts and printed them on a 3d printer.
The tube is there to keep the left and right mount aligned and was to be removed.
The mounts cause the sensors to be far enough away from the track so as it would not reliably count all the laps. It was only about 1 mm difference, but it makes a difference.
Not using the sensor mount made the IR Sensor and IR LED as close to the track service as possible.
I could not get a better side view but it looks like the car slot paddle might NOT break the beam totally. I guess we'll see as soon as we hook it up and try.
Continuing on, I drew a line where the sensors would be:
And removed the plastic with a Dremel.
Next I hot glued the sensor and IR LED to each side of the slot
There may still be an issue with the beam being reliably broken by the paddle (denoted by the poorly drawn green arrow
I wired all the components together so we can more easily mount under the track
To the main controller board
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