Uploaded December 2024 | Updated September 2026, 1 hour ago
Sponsor of this video: pcbway.com
PCBs, PCB assembly, 3-D printing, CNC machining, and injection molding - super fast, high quality, and very affordable. Everything you need for your next project.
#Spectrometer #Arduino #3dprinted
In this video, I show the building and operation of an experimental 3-D-printed spectrometer. It is based on discrete LEDs with specific wavelengths placed on a ring rotated by a stepper motor. The measured values are then used as supporting points for three interpolations (Lagrange, linear, and cubic spline). Another possibility of the spectrometer is to combine the spectral emission of the LEDs with the spectral sensitivity of the sensor's photodiodes (the AS7341 has 9 photodiodes that can be addressed individually).
As an LED's wavelength only changes with temperature, a Peltier element could cool or heat the LEDs to get a wider spectrum.
I also use a flow-through cell for continuous measurements, which are used, for example, in a flow injection analysis device.
Sponsor of this video: pcbway.com
PCBs, PCB assembly, 3-D printing, CNC machining, and injection molding - super fast, high quality, and very affordable. Everything you need for your next project.
#Spectrometer #Arduino #3dprinted
In this video, I show the building and operation of an experimental 3-D-printed spectrometer. It is based on discrete LEDs with specific wavelengths placed on a ring rotated by a stepper motor. The measured values are then used as supporting points for three interpolations (Lagrange, linear, and cubic spline). Another possibility of the spectrometer is to combine the spectral emission of the LEDs with the spectral sensitivity of the sensor's photodiodes (the AS7341 has 9 photodiodes that can be addressed individually).
As an LED's wavelength only changes with temperature, a Peltier element could cool or heat the LEDs to get a wider spectrum.
I also use a flow-through cell for continuous measurements, which are used, for example, in a flow injection analysis device.
