portable_spectro

Today I soldered LED parts, and tested their attachment.

It is good in LED connection, and soldering using hot air gun in spite of pretty cheap price of rework station.

The PCB, stencil, and all parts are arrived at 20200819.

Next, I have to place  all the parts on PCB, and find out that they are fit or not.

For the precision of spectral data, I make the modification of LED illumination, which is separated into two drivers handling Visible LEDs, and broad NIR LEDs, respectively.

19.June.2020. - I made some changes in schematic, and drawing, which adds buzzer to interact with user, and termperature-humidity sensor to improve some kind of calibration for spectroscopy. I hope to finalize the design as soon as possible.