kair.us/ projects/
weller_driver/ diy_wmrp_handle/
DIY Weller WMRP compatible handle and stand
You can build a WMRP compatible handle yourself. Rens PA3AXA has
designed a 3D-printable handle and PCB for it. You can buy the PCB
from DirtyPCBs using this
link. The board needs to be ordered as 0.8 mm thick. The new
V2 layout moves the KTY82 cold point compensation PTC closer to 3.5
mm jack for better thermal contact. With this change, the
temperature stability is now excellent, and in par with a genuine
Weller WMRP handle. Design files available for download below:
Handle.skp.zip Handle mechanical model,
designed with SketchUp.
Handle.stl.zip
Same file as above, but converted to .stl
Handle_Eagle-V2.zip Circuit
diagram, assembly drawing and CAD files, designed with Eagle 6.
handle_bom.txt Part list
Below are pictures from Rens and his build. He has also modeled the
front panel so you can print it if you don't have access to milling
machine. Get it here.
UPDATE: A new version of the 3D printable front panel, get it
here. It includes now
standoffs to get the PCB to correct height. It also has room to fit
a 2 mm thick display filter. You can get suitable display filters
from conrad.nl / conrad.de. Part number is 185230
for red filter and 175264 for green filter. Photo below is version 1
without filter.
A tip from Rens how to get flexible cable:
"I prepared the cable my self using 4x 1 mm PTFE stranded
copper wire into a
number a 8 tube [ 5 mm outer, inside 3 mm, wall 1 ] from
Stand / holder
Remco has designed a holder for the WMRP. The two holes shown in
image below are for two big magnets to snap the holder to a metal
case. On the other side is alse one hole for a smaller magnet to
activate the reed switch.
Image below shows bottom view of the holder. You can put 4 big nuts
to add weight.
You can download the holder .stl file from here.
kair.us/ projects/
weller_driver/ diy_wmrp_handle/
page created 12.3.2020
last updated 23.2.2022 webmaster@kair.us