Summary
The GROK disk is a mote-equiped mostly plastic assembly that fits underneath a hand operated hand sanitizer bottle and allows the mote to detect when the pump has been operated. It is shaped so that all the force of operating the bottle is directed into an adjustable spring plunger. A leaf switch detects the deformation equivalent to operating force.
Design
The Grok Disk V5.1 was designed to be constructed in a rapid prototypeing machine. It includes several features that would be impossible to mill. For large scale production we plan on making a pressurized mold setup, but this is yet to be accomplished. The CAD files that define the plastic parts of the assembly are on the server in the archives. Here is an overview of the features:
An unusable model made on a different machine
- Mote mount
- USB slot
- Three mounting holes
- Three mounting platforms
- LED viewing hole
- Battery mount x 2
- I-beam protrusions
- constraint for the battery clips
- room for soldering
- channel exit for wires
- Batteries contstrained by mote on one side and wall on another.
- I-beam protrusions
- Switch pressfit
- Individual slots for switch legs
- Press fit corners
- Buttresses removed
- channel for wire exit
- Hole for spring plunger
- Channels for wires
- Connect positive and negative sides of two batteries near USB
- Brings power, ground, pulldown switch out to mote.
- Pivot indentation
- Matching Pivot in ceiling
- Screw pillar indentations
- Matching screw pillars in ceiling
- Ceiling indentations to account for batteries
- Sloped outer walls to give the apprearance of parrallel lines when the top is resting at an angle
- Channels on the bottom allow it to sit in the carriage at an angle
Assembly
Wires Run between mote, batteries, and switch
Screws with two o rings attach. Channels provide stability and optimal angleThis is how the mote is connected to the device
This is how the mote is connected to the device
The pins which connect to the wires
Black is ground, red is power, white is pull down signal
Wires are stacked within the channel
The wires are soldered to 1 by 1 .1inch female header, which slides onto the male pins coming out of the mote
This wire goes to power the mote
This wire travels under the mote
And that wire Comes up here
The ground wire from the switch and the ground wire to the mote are soldered here. The pull down signal from the switch bypasses this junction
Levers are removed for better distance characteristics. White wire is under black one. White wire goes to mote pull down signal. Black wire goes to negative double terminal and from there to the mote ground.