Sports Timing TransponderBlind
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The PCB has a solar cell on one side and a small 40 mAh LiPo battery on the other.
The transponder is used in running, cycling and Triathlon type events, so we need it to be completely waterproof, we prefer that the unit is ultrasonically welded to form a hermetically sealed product.
The transponder will need to worn by runners, attached to bicycle forks, attached onto ankle straps, etc. An approach we would like to take with the design is to allow for the transponder itself to have a minimalistic design with a universal mounting option that allows for it to be attached to a separately designed Bike mount, or wrist strap.
Ie: the Bike Mount would be a separate design that cable ties (zip ties) to the front fork of a bicycle, then the transponder clips onto or locks into the bike mount. This would allow for future designed mounting accessories, while keeping the transponder design standard.
The design considerations include:
- The housing must be completely waterproof (Hermetically sealed). We would prefer that the unit is sealed with ultrasonic welding.
- We use a solar cell on the top of the PCB to charge the small LiPo battery, so there should be a transparent section in the housing to allow for light to reach the solar cell so that the LiPo remains charged.
I have attached an image of the transponder as well as an STL file of the PCB Assembly. We can send further information and output files as required.
- Compact
- Waterproof (parts need to be designed for Ultrasonic welding)
- Universal mounting design to allow the transponder to clip or lock into separately designed mounts in the future.
- SolidWorks
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Discussion
Showing last 20 comments - View AllI have attached an image "concept" to the contest to better describe my comments below and provide more clear design direction.
Please excuse the terrible drawing from my touchscreen, but I hope that this will help explain it better.
Thank you.
Buyer
Some feedback from the team so far, hope this will help narrow down the design:
- Preferably, the top half of the housing where the solar cell is located, should be a single part that is transparent (ie: no separate window design). We may apply a spark finish to the inside of the lid to conceal the PCB and allow light to pass. We can then print on the lid to decorate.
- Looking at the mechanism for the transponder to attach to various objects. We would prefer that there is a locating groove or slot (something along these lines) that allows the transponder design to locate into a separate bracket designs in the future. This would give us much higher flexibility in terms of mounting options going forward. So imagine a bracket that holds the transponder firmly on the sides, we are thinking it may be best to employ a groove or slot on the sides of the transponder housing.
Hope this helps and thank you so much for all the designs we have received so far.
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thanks
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It would be best to make the housing design slightly larger to accommodate for rounded corners.
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MobiiSystems
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