(click for full size)
Everything from my previous post still applies here. By substituting 74HC14/74HC04 parts I mean that you don't have to use the SN74HC14 or SN74HC04. For example, I will be using the CD74HC14 and CD74HC04 from Texas Instruments. Other manufacturers will probably work, just verify against the datasheets.
A few notes here...
1) I bumped down the pull-up resistors from 680 ohms to 540 ohms. This will give If = ~6mA for the diodes in the opto-isolator. 680 ohms was a bit too close to the minimum If = 5mA for the opto-isolator part for my comfort, but will still work.
2) The NPN transistors driving the opto-isolator diodes are probably a bit of an overkill here as ~12mA is well within the rated current of the 74HC14. I'm not a huge fan of driving diodes directly from an IC output, but that is probably just the conservative design practices from work rubbing off on me.
3) U1 VCC is connected to the SIDECARVCC net and GND is connected to the SIDECARGND net. U2 VCC is connected to the JAG1VCC net and GND is connected to JAG1GND net. U4 VCC is connected to the JAG2VCC net and GND is connected to the JAG2GND net.
4) All of the headers are standard 0.1" pitch (spacing) headers. You could either wire directly to these connections or use the appropriate header parts.
I finished up a PCB design last night and will be ordering some from a manufacturer either tonight or tomorrow. Due to economies of scale I will probably have a few extra that 1712 will not be using. I would be willing to part with these at cost either assembled or left to the user to assemble. Do note that the PCB utilizes surface mount components except for the opto-isolator so surface mount soldering experience is recommended for DIY assembly. The board sizes in at 2.46" x 1.4". I can't guarantee any delivery date as I would prefer to test one of them out here before I send any out to avoid issues.