Morse paddle inspired by http://members.ziggo.nl/cmulder/paddle.htm
This paddle is very much a work in progress, but the current version (V2) is functional.
Here it is in use (I'm a beginner operator, timing is a bit tight):
The hardware required is the following :
for adjusting the resistance :
NOTE: Depending on the material used, the center post may flex. This is happening with PETG. I am looking at option to make that section for rigid. If you have a suggestion, please add a comment.
11/17/2018: First test with PCB 1/32" as the springboard. This is a bit stiff - around 50g to squeeze the paddle. Next test will be with some brass strips, and then 3d printed springboard with some copper shim glued on top to make the contacts.
11/28/2018: Uploaded V2 : Ordered 0.6mm PCB from JLCPCB and got around 10g for 3mm of travel. 0.4mm PCB is available, but as a much more expensive option for small runs. Based on some research, it seems that users want from 5 to 50g. This all depends on the travel. To get to 20g, this means a spring rate of 0.37lb/in and to get to 50g, we would need a preload of ~7.5mm, or a different spring rate. The paddles are 3mm thick - this may be possible.
12/07/2018 : Uploaded case with holes for the ball plunger. Updated description
12/08/2018: Uploaded dimensional drawing for the springboard.
12/18/2018: Replaced the STL file for the paddle base as user notified me that some holes were missing.
01/06/2019: Released version 3, with a 3.5mm connector, and a much more flexible paddle using a printed flex section.