640nm Radial LED board

640nm LED board for use with Open Colorimeter products. Compatible with the radial LED cuvette holder.

The 640nm LED board has STEMMA QT for connecting to the Adafruit STEMMA QT TSL2591 High Dynamic Range Digital Light Sensor board via a 4-pin cable and JST SH connectors. 

LED specifications & datasheet: 640nm Radial LED 

PCB Features

• Open hardware. KiCad design files @ https://github.com/iorodeo/i_control_led 
• On board voltage regulator enables operation from a 3.3V to 5V  input voltage
• Active constant current LED driver maintains stable LED current. 
• Dimensions: 25.4 mm x 20 mm x 1.6 mm
• Two 4-pin JST SH connectors (QWIIC/STEMMA QT)
• Four M2.5 through holes for mounting e.g. to a cuvette holder