0:00 PCBWay Sponsorship: The video is sponsored by PCBWay, highlighting their PCB prototyping, CNC, and 3D printing services.
0:05 Project Overview: The video follows up on the TCD1304 spectrometer project, showcasing software updates and interesting light source measurements.
0:25 Spectrometer Hardware: The spectrometer utilizes a BMW Tech BTC 100 housing with custom designed PCB for the TCD1304 linear CCD. The PCB design was revised with improved layout and shrunk in size.
0:54 Compact Solution: The CCD carrier was turned into a board that can be directly mounted on top of an STM32 F411CCU6 microcontroller.
1:45 Professional Light Coupling: The spectrometer has an SMA connector for professional light source coupling via fiber optic cables.
2:00 Custom Enclosure: A custom designed and 3D printed lid was made for the spectrometer housing to seal Stray light.
2:13 CCD Upgrade: The original Sony ILX 511 CCD with 2048 pixels was upgraded to a TCD1304 with 3648 pixels.
2:30 Optical Components: The spectrometer includes a grating mirror (1800 lines/mm), focusing mirror, cating mirror, and a 50-micrometer entrance slit.
3:12 Light Source Demonstrations: The video demonstrates the spectra of a high-pressure sodium lamp, a fluorescent light (used for calibration), an IKEA grow light, a standard LED bulb, and an LED filament lamp.
4:00 Lamp Enclosure: A custom metal box with an E27 socket and fiber optic connectors was built to house the lamps for measurement. A separate igniter circuit was built for the sodium lamps.
5:16 Software Updates: The software used to capture and visualize data from the TCD1304 CCD has been updated and features three acquisition modes: single exposure, spectroscope, and scanner mode.
6:35 Baseline Subtraction: The software includes a baseline subtraction feature to remove background noise and amplifier offset.
8:00 Calibration Algorithm: The calibrating algorithm in the software was updated to allow a proper calibration using a fluorescent line. It now uses a third-order polynomial fitting for improved accuracy over a linear fit.
9:36 Fluorescent Light Spectrum: A fluorescent lamp with multiple emission peaks is used to calibrate the spectrometer.
11:29 Wikipedia Reference: The person who captured and shared the fluorescent light spectrum on Wikipedia found the video and left a comment.
13:06 LED Filament Spectrum: The LED filament lamp mimics the spectrum of a tungsten filament light source.
15:31 Incandescent Spectrum: The tungsten filament bulb produces very low intensity, especially due to limitations in sourcing higher wattage bulbs in Sweden.
16:24 Grow Light Spectrum: The grow light's spectrum is analyzed, showing the difference between the outer and inner LED rings, including the presence of red light in the inner ring.
17:59 Sodium Lamp Spectrum: The spectrum formation of the high-pressure sodium lamp is captured in real-time, showing peak splitting as the lamp heats up.
22:20 Laser Calibration Check: The accuracy of the spectrometer is verified using 650nm and 532nm laser pointers after calibration with fluorescent light, confirming good wavelength accuracy.
25:21 Future Applications: The creator is looking for affordable applications for the spectrometer and encourages viewers to share suggestions and support the channel through membership.
25:53 Website Information: Viewers are encouraged to visit the website to view the captured Spectra and read the supporting article. The PCBWay project page for the CCD circuit boards is also linked.