
External PCB
Hackuarium/simple-spectro
Very cheap, autonomous and precise spectrophotometer for DIY biology and chemistry.

The TSL237T is an ambient Light Sensor made by Advanced Monolithic Systems in a SMD-4P package with 4 pins. -40℃~+85℃ 2.6mm 2.7V~5.5V 3.8mm Built-in temperature compensation Light Intensity SMD-4P Ambient Light Sensors ROHS.
PCBKit's library has its footprint (EasyEDA_Cloud:LED-SMD_L3.8-W2.6_TSL237T, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C20557177). 2 open-source boards in 2 repositories on GitHub use it.
The library has no symbol for this part yet.

Hackuarium/simple-spectro
Very cheap, autonomous and precise spectrophotometer for DIY biology and chemistry.

<iframe src="https://pcbkit.io/embed/parts/ams/TSL237T" title="TSL237T in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/ams/TSL237T.jpg" alt="TSL237T" width="1200" height="900">[](https://pcbkit.io/parts/ams/TSL237T)Yes. the footprint EasyEDA_Cloud:LED-SMD_L3.8-W2.6_TSL237T, both drawn on this page. PCBKit places them on a board for you when you design with it.
SMD-4P, with 4 pins. Its footprint is drawn on this page.
JLCPCB lists it as part C20557177, with 0 in stock; the sellers' links on this page open their listings.
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.