On Jul 1, 2021, at 8:34 AM, Terry Smedley <terry....@gmail.com> wrote:
Here are some pictures from building Norberto's new front panel. Construction was quite smooth. One minor issue with the BOM noted (only affects the connection to the 3mm speed indicating LEDs).
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<FP Cable Assemblies.pdf><multi-color_LEDs.jpg><front_panel_wiring_cleanup.jpg><smoke_acrylic_8MHz.jpg>
Very nice and great to see it working.
On Ptouch labels you can use the following files:
http://koyado.com/Heathkit/H8_DUAL_GIDE_Controller_files/PAM37-Part1.lbx.zip
http://koyado.com/Heathkit/H8_DUAL_GIDE_Controller_files/PAM37IDE-Part2.lbx.zip
Norberto
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- My suggestion would be not to try to use the Heath clip that supported the front panel circuit board from the metal front cover. First off, the clip doesn't immediately fit the thicker board. But more importantly, the +8v trace at the top front of the board could be shorted to the ground plane on the back of the board or to the metal front panel.
Ouch! I missed that. Please no clips as the board is thicker. And no need for the bottom/top metal stiffener bar unless you are using the 7805 regulator as it serves as a heatsink as well. We highly recommend to use switching regulators and to be installed on side 1 of the board. Side 2 will be for the 7805 regulators on bottom stiffener bar.
Norberto
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Yes, on the buildout board doc.
Norberto
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Perhaps a REMarks issue too.
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First of all congratulations and thanks for leading the way Terry.
I don’t recall seeing many ideas/suggestions here for replacements on the acrylic lens. The smoky acrylic looks great! I love the visible speed LEDs (and the video you shared that shows the “step down” to 2Mhz when needed for H17). Since the lenses are often missing or damaged on older H8s we’ve needed a good replacement solution. You could consider using dry transfer lettering instead of the pTouch labels. Or I guess we could silkscreen these? (can you silkscreen acrylic? Is that how Heath did it?) I’ve often thought that small allen head screws would be a nice way to secure the lens but haven’t yet been willing to drill into the front of the chassis to do that!
Curious if you’ve tried installing the DUART/VDIP daughterboard on the CPU? How’s the clearance with the new front panel board?
I notice your 7-segment LEDs still have the plastic protectant sheet on them. that can be removed with no issue.
The instructions for the Z80 4.0 board jumper say “When installed, sends 2 MHz clock to the H8 backplane regardless of CPU speed. This is to support the new H8-Front-Panel V1.2 if users want to sync with the CPU clock.” Is this to essentially make things work like the original H8 design (vs the new approach of putting a 2.048 Mhz oscillator on the FP board?) not sure if/when one would want to do that?
Wow. It’s been a whirlwind year so far with all these new boards! I’m sure it’s hard for many in the group to keep up. We’ll need to make sure we capture and share all the knowledge as many of our members may not get to these builds for a while…
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The clearance issues with the VDIP1 on the DUART really aren't changed.
I will provide guidance on this as it is working for me.
Norberto
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Updated Front Panel BOM as two typos were encountered during build-out.
Link to updated BOM: http://koyado.com/heathkit/New-H8-Website/download/h8-fp_v13_bom.xlsx.zip
Thanks,
Norberto
From: "se...@googlegroups.com" <se...@googlegroups.com> on behalf of Glenn Roberts <glenn.f...@gmail.com>
Reply-To: "se...@googlegroups.com" <se...@googlegroups.com>
Date: Thursday, July 1, 2021 at 5:13 PM
To: "se...@googlegroups.com" <se...@googlegroups.com>
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Since the color indicates the speed I feel like it may not be necessary to label the 3mm ones. Could clutter the look.
I use the 5th LED position (5mm LEDs) on my system for the disk access LED. It would make sense to label that.
From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of Terry Smedley
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Perhaps label the 5th position just “I/O” ? would be cool to aggregate all the board I/O signals to one LED but that sounds like a challenge. As it is I have the VDIP/USB I/O light, I/O lights for floppy drives, Z67 IDE, etc… currently I use it for the Z67 IDE
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