YELLOW LEDs
Spectrographic analysis of an ISP "high yellow" LED.
Spectrographic analysis of a 5mm yellow/amber LED of unknown manufacture.
Spectrographic analysis of a "two chip" yellow LED from the early-1970s.
If (forward current) was just under 2mA here.
Spectrographic analysis of a "two chip" yellow LED from the early-1970s.
If (forward current) was just under 30mA here.
Spectrographic analysis of a GE SSL-1 SiC (silicon carbide) greenish yellow LED from the late-1960s.
Spectrometer's response was narrowed to a range of 390nm to 400nm to show the rather queer LED emission line at 393.9nm.
Spectrographic analysis of a GE SSL-1 SiC (silicon carbide) greenish yellow LED from the late-1960s.
Spectrometer plot's range was adjusted from within the included SpectraSuite software to be full-height.
Spectrographic analysis of the LED in the yellow Putt Tracer.
Plot is lower than desired because the product has minimal intensity.
A second spectrographic analysis of the LEDs in the yellow Putt Tracer.
This plot was adjusted via the SpectraSuite software to be closer to full scale.
Spectrographic analysis of a rectangular yellow LED harvested from an old pee-cee.
Spectrographic analysis of a GE SSL-1 SiC (silicon carbide) greenish yellow LED from the late-1960s.
Baseline was artificially lowered with Photoshop to show actual spectral output.
Note the unusually broadband output.
Same as above.
Baseline was artificially lowered with Photoshop to show actual spectral output.
Spectrographic analysis of the LED in the FlyTech™ Bladestar.
Spectrographic analysis of a 5mm yellow LED, circa. ~2005.
Spectrographic analysis of a 3mm diffused yellow LED from the 1980s.
Spectrographic analysis of a 5mm diffused yellow LED from the 1980s.