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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: curtis on September 01, 2014, 10:49:10 PM

Title: A500 keyboard reset circuit
Post by: curtis on September 01, 2014, 10:49:10 PM

Been playing around with that circuit that allows the use of an A2K/3K keyboard and gives the CTRL-A-A reset ability.

You know, for a little circuit with only one IC and a handful of caps and resistors, that thing is a bugger to lay out on a PCB!

Has anyone else played with this?  What did your PCB look like?  Rats nest comes to mind!

Title: Re: A500 keyboard reset circuit
Post by: danbeaver on September 02, 2014, 01:19:44 PM

Have you thought of using PCB layout software to design your board?

Title: Re: A500 keyboard reset circuit
Post by: curtis on September 02, 2014, 01:42:46 PM

Quote from: danbeaver;772235

Have you thought of using PCB layout software to design your board?

Been doing that.

I picked up a package that "supposedly" allows linking a schematic your draw to the pcb layout.

Did the schematic and then opened  the pcb side of the package, linked the 2 and started laying out the board.  Tried checking the connections and nothing!

Ended up doing the entire pcb layout manually and then spent several hours "tweaking and peaking" trying to get the board cleaned up as much as possible.  Still pretty ugly, but it's doable.

Was just hoping someone had done it so I could compare what I came up with to theirs.