Saturday, 27 September 2014
The diameter is very similar so it's not going to mess up the look of the gun and should mean is going to be an easy fit.
No chance of fitting the muzzle flash LED inside the emitter as I've bought it complete. It'll have to be somewhere on the front face of the gun, but this shouldn't be hard to pull off.
I need to buy some NiMH batteries to turn into a 7.2V brick. The 3.6V Li-ion ones you get are appealing but more complicated to charge so ideally need to be removable.
I also need to buy an assortment of switches as I've nothing but little PCB tactile stuff at the moment. This will need a power switch, reload switch and trigger. I've a half formed plan to use reed switches but it might not work out.
The Lasertag gun I bought made up by Phil was constructed out of a Playstation Time Crisis style light gun and I can see why. You get something already designed to emit IR with a switch at the trigger and a smattering of other buttons.
Sunday, 21 September 2014
Now, with a Blake's 7 LARP coming up I remembered the offer and picked it up from them. On numerous occasions, particularly in series 1 & 2, it looks like the B7 crew use a large plastic coolbox as luggage.
OK, so the box in B7 is generally red, but this is LARP not cosplay.
Over the next few weeks I will attempt to fill it with a bunch of weird probe type tools like those Vila and Avon used. I'm, playing a technician type character and want to have some bits to play with in game. I reckon crocodile test leads, multimeter, a few things with flashing lights on etc. will work nicely.
Monday, 1 September 2014
Phil Higgins makes a sensor designed to be worn on the head which is accepted to reliably take hits outdoors and has all the 'data over tag' stuff coded in by him already. Loads of people in the group I play with use these and I can't see myself replacing mine with something of my own devising.
However I do want to make a 'target' for testing Laser-Tag guns against and maybe some props that can be shot as part of broader functionality. So tonight I messed about with a simple test rig of an IR detector wired up to an Arduino with an Interrupt Service Routine attached to the relevant pin.
Laser-Tag uses a 56Khz carrier signal which is slightly different from typical IR remote controls, but there's a recommended component for putting in the sensors: a Vishay TSOP34156. This filters out the carrier signal and background noise from ambient light, leaving you with a microcontroller compatible output of just the encoded signal.
So far so simple, I now have a simple sketch that will flash a light and play a tone when I shoot the sensor. It's not really matching the Laser-Tag signal, just counting pulses and registering a hit if it gets enough in a short period. One of my remote controls sets it off.
This is something I can work on. For now though, tonight's fiddling has shown me that building a target shouldn't be hard. So I can start making the case etc. and then hone the code once it's in a usable shape.