Slicer Discord
HP41 Final Upgrade Zebra – 3D printable model from Thingiverse Thingiverse

HP41 Final Upgrade Zebra

by grob6k
2 Downloads
3 Likes
0 Makes
Go to Model
HP41 calculators from 1980s are prone to failure of the connection between the keyboard assembly and processor board, which is normally achieved with a flexible or zebra connector. As the contact relies on pressure provdied by plastic screws through the case, and the posts are prone to stripping/cracking, this is a common source of failure of these calulators (which can appear as anything from keys not working, display garbled or absent, or expansion modules not working).

I've developed a solution replacing the zebra/flex with these contacts available online:
**Link:** https://www.aliexpress.com/item/1005005581460411.html
**Type:** FDX0029A1
**Quantity:** 32 required; but you will lose/ruin a few, so get 50x

These contacts are soldered directly onto the 32 keyboard PCB contacts, replacing the zebra, which is approx 1.5mm assembled.

As this part might not be available forever, critical dimensions are:
Width: 1.5mm
Length: 3.5mm
Height: minimum =1.6mm. Working height (if s
Source
Thingiverse
What you need to print this: Intermediate Low confidence
Single piece Hardware needed
Supports 1/3
Assembly 0/3
Settings 1/3
Bed size 0/3
Post-process 1/3
Printer
FDM / FFF
File format
STL
Material
PLA, ABS, Polycarbonate
Post-processing
Hardware
Software
Cura, PrusaSlicer, or similar
No ratings yet
No comments yet – be the first!
Feed Blog Slicer Cost Calculator Image Search Submit Kontakt Discord ☕ Buy me a coffee
DE EN FR ES IT NL

Add to Collection