This spectrophotometer project uses a diffraction grating to split white light into separate wavelengths. A mechanically actuated slit selects a single wavelength to pass through a sample and into a high-accuracy digital light sensor.
- digital light sensor
- diffraction grating
- 1W white LED
- 3V 500mA power supply (we use a 5V power supply with a large power resistor)
- magnifying glass
- structural materials (LEGO blocks, cardboard, wood, or similar)
- Arduino board
- Grove sensor shield
- sensor wires
- additional wire
- light source (LED)
- lens (magnifying glass)
- diffraction grating (at pivot point)
- light sensor
In operation, the sensor and sample box should be cover to avoid measuring ambient light. This device requires manual (by-hand/by-eye) calibration.
Instructions will be provided when we have finished prototyping.