Programmer Experts - Need review

[GatorGnet]

I have been working on a JDM design and wanted some advice/reviews on the design. I'm not taking any credit for it, it is just several schematics lego'd together. The traces for the 40 pin may not be correct, I haven't gone over those 100% yet. I am more interested in the 18 pin for now.

**broken link removed**

 

[nigelwright7557]

The thicker the tracks the better.

Adding a powerplane would be good too.

 

[blueroomelectronics]

Have you tried prototyping (point to point wiring) the JDM before you make a PCB? JDMs are notoriously unreliable programmers. You'll also need a real RS232 port the USB ones won't work.

 

[GatorGnet]

I haven't made it yet. I have plenty of copper to try it though. I have some proto boards but it seems like it would be too much wiring to try just for a test. I hope to get the bugs worked out by going over the design before I build the first one. I will add the fill planes after I finish the whole thing. I kept it out to keep it cleaner while asking for a review.

And yeah, I've heard about the usb->RS232. Everything I have has the real one.

 

[chrischris]

To my experience JDMs are not good choice but still for some people it works so try it. Actually with JDM the voltage must be raised quick enough from 0 to 12V for successful programming so make sure this usb --> RS232 does that.