[REVIEWED/TESTED] – Thirteen Different Optical Sensors For Measuring PWM With An Oscilloscope [WARNING, LONG POST]

[jeff51]

DavidEF sent me some LEDs to test as sensors as well. My Thanks.

I started a new thread about testing lights using a 192KHz sound card.

Measure PWM using Free Software and a 192KHz Sound Card

Expanding on these posts: Terry Oregons - Testing various sensors for changing Photons to Volts. A must read for those interested in getting the best performance for waveform analysis. My post about building a sensor from Terry’s design. My post about using Audio software to measure PWM/ My post about trying O-Scope software to see PWM All my previous testing was done using a 48KHz sound card. In ToyKeepers post about seeing PWM in falling water or in a photo, DavidEF mentioned that…

It works quite well for slower PWMs and can catch higher frequencies on it’s Freq. Spectrum screen.

ToyKeeper and the BLF crew.
I tested the new BLF SP36 with the Samsung LEDs. Just a wonderful light!