That sounds great! (more...)

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Posted by Munich on 8, 2001 at 8:30 AM:

In Reply to: Re: How to implement discrete logic circuit?? posted by Derrick Renaud on 7, 2001 at 8:33 PM:

That definately sounds more like what I want to do. I used PCB design software to lay out my circuit, and if I use discrete logic chips, it will take 9 chips and have something like 90 traces -- utilizing both sides of the board.

I figure if I can get the logic into a chip, that will greatly reduce the amount of work I need to do to create the PCB.

Can you provide some more info on that Atmel chip -- especially what tools are needed to do such a job? I did a bit of research on their site and downloaded a spec sheet for it. Is it the AT90S1200 that you used?

: I have already programed an Atmel 1200A chip to do this. It does not require any external parts. Plug the chip into a 20-pin socket. Solder wires to the socket and wire it in line with the switches. I am adding turbo fire code to it right now. I will post here when I have pics and code on my website. A week or 2.

: Of course this would require the ability to burn atmel chips and soldering skills. Though if there was a need for 50 or more, It would make it feasible to make circuit boards with screw terminals for hookup.

: Derrick

: : : I have come up with a simple circuit that I hope can be used to make 8-way joysticks act more like 4-way joysticks. It consists of just a handful of logic gates -- nothing really complicated. I've run the circuit though a number of simulators and the results thus far look promising.

: : : So my question is how to realize this thing. I could do like I did in college and get a breadboard a few ICs and wire them all together, but I was hoping for something a little more elegant than that.

: : : Unfortunately, I have no experience with doing this any other way and I can't seem to find any good ideas on the internet. So, I ask you, is there a way to get a discrete logic circuit into a single chip, and if so, what would I need to do it?

: : : Regards,

: : : Munich

: : Check out the "Wire Joysticks" section on this page. This guy did exactly what you are talking about.

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Re: That sounds great! (more...) Derrick Renaud 3/08/2001 (0)

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: That definately sounds more like what I want to do. I used PCB design software to lay out my circuit, and if I use discrete logic chips, it will take 9 chips and have something like 90 traces -- utilizing both sides of the board. : I figure if I can get the logic into a chip, that will greatly reduce the amount of work I need to do to create the PCB. : Can you provide some more info on that Atmel chip -- especially what tools are needed to do such a job? I did a bit of research on their site and downloaded a spec sheet for it. Is it the AT90S1200 that you used? : : : I have already programed an Atmel 1200A chip to do this. It does not require any external parts. Plug the chip into a 20-pin socket. Solder wires to the socket and wire it in line with the switches. I am adding turbo fire code to it right now. I will post here when I have pics and code on my website. A week or 2. : : Of course this would require the ability to burn atmel chips and soldering skills. Though if there was a need for 50 or more, It would make it feasible to make circuit boards with screw terminals for hookup. : : Derrick : : : : I have come up with a simple circuit that I hope can be used to make 8-way joysticks act more like 4-way joysticks. It consists of just a handful of logic gates -- nothing really complicated. I've run the circuit though a number of simulators and the results thus far look promising. : : : : So my question is how to realize this thing. I could do like I did in college and get a breadboard a few ICs and wire them all together, but I was hoping for something a little more elegant than that. : : : : Unfortunately, I have no experience with doing this any other way and I can't seem to find any good ideas on the internet. So, I ask you, is there a way to get a discrete logic circuit into a single chip, and if so, what would I need to do it? : : : : Regards, : : : : Munich : : : Check out the "Wire Joysticks" section on this page. This guy did exactly what you are talking about.

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