Apr 05

Laser Tag Update 4/5/15

My deliverables from two weeks ago were:
1. Rewrite the bill of materials for the tag unit
2. Purchase three additional units
3. (Optional): test tag distances with different protocol timing.

I sorta updated my bill of materials. I have purchased most things from mouser.com, so I have a record of everything that I've purchased and will be able to purchase more if I need to.
I have now purchased materials to build four additional units. Why four? That will give me enough materials to have 5 units. So I could have some asymmetric game play (4v1, 3v2, etc.) or just have up to five people test the things. Or one will break. Who knows.

Do Next:
It will take a week or so for the parts to ship to me, and in the meantime I should prepare for the first game. The only next step I can think of is:
1. Build a receiver unit. It should be able to receive tags from a wide angle (360 degrees is nice, but not necessary). It should have an indicator LED on it.
2. Adjust the code for the first game played.
I am trying to build the minimum viable product. That means the minimum that I can do to make this work is what I should do.

For the first part, I basically need an array of IR receivers that are looking in different directions for a tag. I'm planning on using around 8 right now, because each of the ones that I'm using has a 45 degree field of vision. With 8, I get 360 degrees. I will have to mount that on the tag unit so that you can be tagged from any direction.
I should put an indicator LED on this part. This should go on top of the lens tube. In fact, I could build this in two parts so that you could still see down the center of the tube in order to aim.

For the second part, I need to make the code react to getting tagged in some way so that I can play a game with it. What is the most basic game that I want to play? Standard death match. Each player can get hit a certain number of times. They are out after hit a certain number of times. I need to add some code to keep track of the number of times someone has been hit, and if that counter reaches 0, they are out (I could have the indicator LED stay on or something.
If I want to make the game last for a certain amount of time, I could use a timer on my phone.

For future work, I can get stuff laser cut here: