2 ms·
wow that's neat! sampling between PWM cycles is a cool idea. I'd guess the issue is that the required parameters are not well controlled in the fabrication of
by sofon 8y ago
wow that's neat! sampling between PWM cycles is a cool idea.
I'd guess the issue is that the required parameters are not well controlled in the fabrication of most LEDs. Possibly LEDs not used as indicators, with a tighter wavelength output... most likely this would remove any cost advantage however.
Fascinating stuff!
- jotux 8y agoYa, they're not designed as detectors so there's no control over the parameters that determine how good they are as detectors. Interestingly, one of the reasons I was looking at light sensors was because our pyroelectric sensors were erratically sensitive to incandescent light. We wanted a reliable way to detect bright light and mitigate the effects in software and were hoping to use an existing component on the board as a sensor (our products were extremely cost sensitive due to the volume, so adding a $0.12 sensor was actually a huge deal).