Main > Main Forum
Q-bert controls software asjustment ?
<< < (16/17) > >>
juggle50:
I gotcha,

So the fuse is between the power supply and the relay on the positive, rather than between the relay and the knocker on the positive as it is in my diagram.  That is a big help.

I talked to Randy and the MA output is 500ma's total if you are using the power from the usb or 500ma's per port if you wire the power directly from the Computer Power supply to the LedWiz.  So that should work just fine. 

Also, I created a new qbert.lsq for powermame which will isolate the port outputing the 5 volts to the relay.  It wasn't too hard to figure out, just had to get more familiar with both powermame and LedWiz lsq files.

Oh yeah, does anybody know if the sound of the knocker that plays in MAME (or powermame) can be switched off?  I couldn't find away to do that.  Or would it play on the original game?I can't remember.

I'll order the relays, fuse, fuse holder and diode today. (probably several just in case I  I make a mistake.) 

Level, that sucks that yours got put on a boat.  If it never arrives let me know and I can order one for you from that Pinball supplier that I bought mine from.

Lastly, thanks for your help on telling me which way all the wires go to the relay.  I'll probably need some more help with that but I was going to wait to ask anything until I got all the parts.

Talk to you soon fellas

Level42:
Sure thing, about the knocker sound, cant you simply delete the sample file ?
Level42:
Finaly received my knocker !!!! It's exactly the right one.  I tested it with 2 12Volt batteries in series (so about 24 Volts). I've experimented a bit with it, and I'm convinced that this thing needs a box to sound as good as possible. Tried it on a side of my cab, but this doesn't give a low sound. I tried it on a small shoebox and it sounded amazingly good !

Anyone with a real Q*bert cab that can tell us how this is built into the original ?
juggle50:
Hey Level,

I'm glad to hear that  your knocker finally came, that is awesome!!!!  My radio shack stuff came the other day as well although I'm so busy right now I don't know when I'll have time to experiment.  :(  I haven't had a chance to play around with the artifical qbert sount in PowerMame.  PowerMame does not have a samples folder, which leads me to believe the sound is in the rom.  Again, I'll have to put more time into investigating.

As far as the box for the knocker, I don't know how the origional was set up, but have you tried mounting it  in one of the bottom cornors of your cab so that the rubber piece on the very bottom of the knocker is touching the bottom of the cab?  I saw a picture of it mounted that way in a cab, however the picture was of a mame machine not an origional qbert cab.  It may resinate more if it is mounted to the bottom..

Also, I've got the relay and am confident I have found the COM pin and the NO pin.  However, I'm a little confused about the + and -  pins that will be wired to the ledwiz.  It isn't clear which is supposed to be wired to the positive and which is supposed to be wired to the negative.  Does it matter as long as I have the diode going the right way?

Anyway, stoked that your stuff came.

Level42:
Thx Juggle,

No the coil of the relay doesn't have a + or - side. It doesn't matter which way you connect it. (Unless there's a built-in diode, but that is normaly not the case). Are there any markings like C or something on the other pins ? Then those are the coil connections.

I will get my electronics stuff this week and will report back. Think I will first set it up like Brad has done it. If that will work, I still will see if my design has any chance on working. I will check with some electronics guys.
Navigation
Message Index
Next page
Previous page

Go to full version