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  • aireal commented on aireal's instructable Arduino Fencing Scoring Apparatus 2 months ago
    Arduino Fencing Scoring Apparatus

    Thanks for the comments. I think you under estimate the complexities in designing a wireless system for 3 weapons. The 1st problem that you need to overcome is that there is no common ground, so it is easy to detect an off target hit, but on target is a lot harder. Basically the jacket cant send a signal back thought the weapon because there is no common ground.The second problem is that of synchronising the timing between the 2 fencers. Here I am talking about sampling time of the ADCs. If one is more than 1ms behind the other then any lockout is worthless. This requires highly accurate clocks and a way of syncing them every few seconds.The 3rd and probably easiest of the problems is transferring that data back to the central control unit and ensuring that the correct hit/s is displaye...

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    Thanks for the comments. I think you under estimate the complexities in designing a wireless system for 3 weapons. The 1st problem that you need to overcome is that there is no common ground, so it is easy to detect an off target hit, but on target is a lot harder. Basically the jacket cant send a signal back thought the weapon because there is no common ground.The second problem is that of synchronising the timing between the 2 fencers. Here I am talking about sampling time of the ADCs. If one is more than 1ms behind the other then any lockout is worthless. This requires highly accurate clocks and a way of syncing them every few seconds.The 3rd and probably easiest of the problems is transferring that data back to the central control unit and ensuring that the correct hit/s is displayed. This has been solved before.It took Leon Paul long enough to implement this, dont underestimate how long it will take a lone engineer.

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  • aireal commented on aireal's instructable Arduino Fencing Scoring Apparatus 3 months ago
    Arduino Fencing Scoring Apparatus

    Hi Alistair,The 400 and 600 are analog values of the ADC pins on the arduino, there is no correlation between this and the rules, other than that if allows us to tell if a particular pin is in contact with another pin. We read the voltage of our pins as a value between 0 and 1024, which maps to 0 and 5v. I have pull up and pull down resistors on the pins so I can tell when they are in contact this way. Sorry for the explanation, but you need to have an understanding of ADCs, pull up and down resistors and some arduino knowledge to put this in context. Good luck building the box, please share pictures with us when you do.

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  • aireal commented on aireal's instructable Arduino Fencing Scoring Apparatus 5 months ago
    Arduino Fencing Scoring Apparatus

    So the wiring of the matrix really depends on the type of matrix display you have, The one used here has tristate LEDs, but I have recently changed to using a matrix based on the ws2812b LEDs, which are programmable. They only use one wire which makes it easier to connect up and also to control. As a start you could even just use large single LEDs.

    I used a basic 2n2222 transistor, on of the most common transistors around. It is used because the arduino IO pins cant supply enough current to power the LEDs directly.

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  • aireal commented on aireal's instructable Arduino Fencing Scoring Apparatus 2 years ago
    Arduino Fencing Scoring Apparatus

    Thanks for the comment. Do you have the pull up and pull down resistors in place? Also enable the serial debug code and see what output that gives you. It should tell if you have a hit or not. Which should tell you if your issue is on the scoring side or the lights side.

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