Keyboard Overlays

Everything about 41C 41CV and 41CX Hardware

Keyboard Overlays

Postby TwoWeims » Sat Aug 31, 2019 12:35 pm

Is there a dimensioned drawing of the HP-41 keyboard overlay?
I would like to experiment with making custom overlays using a laser cutter and direct to substrate UV printer.
I can attempt to measure off the keyboard but I would like to be as accurate as possible.

THanks
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Re: Keyboard Overlays

Postby Garth » Sat Aug 31, 2019 6:45 pm

Use http://hp.meshuggeneh.net/ . (It's in my links page linked below.)
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Re: Keyboard Overlays

Postby TwoWeims » Sat Aug 31, 2019 7:32 pm

For me it does not generate an SVG file.
I can't interact with or save the image. I will try a different browser...
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Re: Keyboard Overlays

Postby TwoWeims » Fri Sep 06, 2019 11:02 pm

Never mind.
I have acquired a real one.

Calipers... Fusion 360... and on to the laser...
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Re: Keyboard Overlays

Postby rprosperi » Sat Sep 07, 2019 3:09 am

Note that if you carefully make the holes for the bottom 4 rows a bit wider, and also put a double-wide hole on the right side of the 4th row down (i.e. opposite edge from where the ENTER button is, joining the holes for the [EEX] and [<-] keys) you can easily have a 2-sided overlay. Well worth the small effort, as this generally will let you mount 4 (or even 6) overlays on a 41, by having 2 x (or 3 x ) 2-sided sheets.
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Re: Keyboard Overlays

Postby TwoWeims » Sun Sep 08, 2019 1:03 pm

rprosperi wrote:Note that if you carefully make the holes for the bottom 4 rows a bit wider, and also put a double-wide hole on the right side of the 4th row down (i.e. opposite edge from where the ENTER button is, joining the holes for the [EEX] and [<-] keys) you can easily have a 2-sided overlay. Well worth the small effort, as this generally will let you mount 4 (or even 6) overlays on a 41, by having 2 x (or 3 x ) 2-sided sheets.


That is a great Idea. I will give it a try...
My Collection:
HP-55, HP-67, HP-41CV, HP-15C, HP-16C, HP-48G, DM42
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Re: Keyboard Overlays

Postby GerardSen » Fri Oct 04, 2019 1:51 pm

Did you actually try to do this, TwoWeims? Did it work?
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