uw engineers challenge

I'm pretty sure with the underwater air powered buzzer they are adjustable for the amount of air flow. Small adjustments change the pitch and tone of the buzzer. Should be pretty easy to make them drastically different for two or three playing areas in one pool.

__________________
An aquifer is a water bearing layer of rock or soil. Aquifers are separated by impermeable layers of rock or clay called an aquitard. Aquitard, however may sound a bit offensive to some, and therefore we will be changing the name to Aquachallenge.

@atapene, @tuck

I've tried this already. Change in pressure makes a destinct difference, but not enough in my oppinnion. I went all the way from 5 to 12 bars pressure in the hose, and tried it in the shop. There is only one diference in sound, and thats frequency high or lower, as pitch and tone are the same. I want to make the sound tottaly and completly different, for the same reasons Atapene was talking about.

This will require some fancy adaptation of the buzzer, and I'm pretty sure how to make it, but only for one set, as the other set will be the same as it is. Thats necessary for high-end tournaments like EU or Worlds, where there are 2 playing areas, and a need to make a proffesional tournament. For other games where there are 3 playing areas, 2 of them will have to be with same sounds, but one should be continius sound, the other with interval. And thats still improvement over what we use today in 3 playing area's pool.

But thanks for consern Atapene, I want to hear more of it. This one I knew before, but surely there are some conserns I'm missing. Its the usual thing, when doing something new.

Rudi

Hi guys ! Flk_d_pk I think Sven wanted to say maybe the " dive alert " it´s like the same kind of buzzer that you have attached.

Here in Portugal in March we are going to have our first national champ and our referees are going to use that system. I will post some pics after . but I think it makes a lot of noise

That sounds soooooo cool to me!

If you need, I'll give you some advise how to make the system even better. But its not that hard to make it anyway, now when you know how.
For now, I'll throw you a bone! Use 4 tanks , but only 0.5 liter volume. 2 of the tanks is used by refs, 2 of them are beeing filled from the big tank. This way there will be no pressing for time on filling. But DO fill them for every game! And another bone.... Its better to have 2 - 15 liter tanks for refilling, if you use 0.5 liter ref tanks. Such a small tank needs to be filled to at least 140 bars to assume it will last one game (really depends on who the refferee is...). Thats why you need 2 big tanks.

I'm working on my new units, and I'll make 2 basic models. We'll try them on 23.2.08, and decide which one will serve on EU championship. They are quite diferent design, with their pro's and con's. Also, (very important) I'm working on the knocking the price down as much as possible, as new elements off-shelf minimum costs are staggering 250 eur/unit. I'm looking to knock them down to 150.