Quantity   Component name
1 × white LED flashlight (3W)
1 × spectrometer slit, made with knife from cardboard
1 × concave holographic reflectance grating 42x42mm, f/2.5, 1200lines/mm , made by Richardson
1 × USB webcam 640x480 pixels
1 × software: Spekwin32 initial prototype v1.72.2p for webcam spectrometers