Mechanical design
A HT-tube (polypropylene, DN32) is used as basic housing and to mount all modules together.
Electronic module
The electronic module consists of the µ-Controller (Teensy 3.6), a RF-Module (nrf24l01+), the inertial sensor (MPU-9250), a rechargeable battery and charging electronics. All mounted on a base printed circuit board. 3D-printed battery holders are used to mount the battery. Together with an end cap, they are also used to hold the complete module in the HT-tubing. O-rings are used for shock-absorbing.
Switch insert
A 3D-printed switch insert is used to mount the power- and the mode-button. Two play-switches are directly mounted ito the tubing. All switches are connected via a flat ribbon cable to the electronic module.
Torch holder
The used torches are replaceable. A holding mechanism from a kitchen mixer (Krups 3 Mix) is used to realize replaceability. Mixer hooks with different torch styles applied to them can easily be replaced. By pushing an eject lever, the current used hook can easily be removed. A screw cap and a suitable M23-thread (part of a circular connector) is used to ensure additional locking of the hook.
Counterweight
A brass fitting is used as holder for a counterweight. This maybe necessary because the Kevlar-torches can be relative heavy.
Bill of Material
part | quantity | source of supply |
switch insert | 1 | Shapeways: switch insert |
end cap | 1 | Shapeways: end cap |
battery holder | 4 | Shapeways: battery holder |
eject lever | 1 | Shapeways: eject lever |
hook holder adapter | 1 | Shapeways: hook holder adapter |
torch holder | 1 | Shapeways: torch holder |