YATIR5 Transmitter

Rechargeable TrackIR transmitter. Supports touching the bed for the main unit.  The unit is modelled  for the right side, I mirror it as I prefer it on the left left. 

Uses a dovetail to connect the main unit to something that you can stick on your head. Included files will attach to an AKG headset, a generic connector that can be affixed to something that can be put on your head and if you dent like headsets there is a headband. Cover snaps in place and has a hole to see the charging indicator.  Red for charging, blue or green for charged depending on the board.

I took influence from several other people on Thingiverse making various versions of this type of transmitter.  

AKG headband influence

https://www.thingiverse.com/thing:2421566

General rechargeable concept from here but decided on a parallel wiring for simplicity

https://www.thingiverse.com/thing:4620349

Parts I used

USB-C battery charger

https://www.amazon.com/gp/product/B07PZ6V937/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

JST 2.0 female connector 

https://www.amazon.com/gp/product/B07NWD5NTN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

3000 mAh 3.7 V LIPO battery

https://www.amazon.com/gp/product/B09YQ393N2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

SFH485P emitter 880 nm

https://www.amazon.com/dp/B07T8XX246/?coliid=IWS9FA8L552U3&colid=15V86PYJOJKGX&psc=1&ref_=list_c_wl_lv_ov_lig_dp_it

SPDT switch

https://www.amazon.com/gp/product/B07FVM3XYR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Wired in parallel with a 10 ohm resister

Versions 1-4 had smaller batteries and were light but needed to recharge more frequently