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Keyboard encoder

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Fozzy The Bear:

OK..... Well I'm afraid to tell you this but the Mars Mech that you have is NOT 0V Low.... So you need to keep using the credit board that you have there. 

My advice is to ditch that crappy key encoder altogether and buy a KeyWiz.... They're not expensive and Randy is about the most helpful guy on the planet if you run into any problem. Visit http://www.GroovyGameGear.com and order one today. The KeyWiz Eco 2 is only $21.95 US Dollars..... That's about £11 UK Pounds.

You will need to stick a resistor on the credit line to pull it down to 5V though... Otherwise you'll fry the inputs on the KeyWiz.... I've no doubt that Randy will be able to advise you of the correct value.

You may even be able to send that GS Encoder back to Gremlin Solutions and get a refund on it, on the grounds that their description is a breach of the "Trades Descriptions Act" because it DOES have ghosting and key blocking problems (contrary to thier advertising) and is therefore unfit for the purpose it is being sold for.

Best Regards,
Julian (Fozzy The Bear)

DiGi:


--- Quote from: Fozzy The Bear on January 27, 2008, 07:05:33 am ---OK..... Well I'm afraid to tell you this but the Mars Mech that you have is NOT 0V Low.... So you need to keep using the credit board that you have there. 

--- End quote ---

Thanks for the reply but that confused me  little because even without the Mars Mech connected to the credit  board i get the same problem ,  so i presume your saying that if i get a key wiz and a new coin mech the credit board should work with it ? or would i still need to buy a credit board to ensure compatibility ?.

Thanks

DiGi 

Fozzy The Bear:


--- Quote from: DiGi on January 27, 2008, 07:28:10 am ---Thanks for the reply but that confused me  little because even without the Mars Mech connected to the credit  board i get the same problem ,  so i presume your saying that if i get a key wiz and a new coin mech the credit board should work with it ? or would i still need to buy a credit board to ensure compatibility ?.

--- End quote ---

No..... What I'm saying is keep the coin mech and the credit board..... There's nothing wrong with them. Unplugging the mech and pressing the credit button confirmed that the mech was not defective, because you got the same result.  Having only two wires connected to the encoder confirmed that the credit board is not defective. That Mech and Credit Board are a perfect match for each other. The output is perfect and working fine.

The only thing that is not working as advertised is your keyboard encoder! it's a piece of junk that needs to go back to Gremlin Solutions for a refund.

The only thing you need to buy is a new keyboard encoder. Recommend the KeyWiz.

Best Regards,
Julian (Fozzy The Bear)

DiGi:

Ok thanks

If i was to send it back could you do me one last thing and give me a short explanation of what the problem is ,  because although it states it supports insert coin it doesn't say it supports coin mechs although as i said previously with a microswitch connected technically the encoder works fine as far i can tell so far.

Thanks

DiGi

Fozzy The Bear:


--- Quote from: DiGi on January 27, 2008, 03:23:31 pm ---If i was to send it back could you do me one last thing and give me a short explanation of what the problem is
--- End quote ---

The problem is as Randy Turner said, It's a Matrix Encoder.... It's no better than an ordinary keyboard with wires soldered to it. In fact the chip in it is exactly that. it's a chip designed for a keyboard not for arcade controls. So it suffers from "key ghosting" which is why you end up with 12 keys appearing to be pressed when you actually only connected 1 input.

They falsely advertise it as not having key ghosting and key blocking problems when in actual fact it suffers very badly from that, just as you have experienced here.

Best Regards,
Julian (Fozzy The Bear)

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