I wanted to see if there was any visible pattern in the flicker sequence of the small LED ‘Candle’, so I used the #digilentinc #digitaldiscovery and recorded two minutes of ‘flicker’.
I used some vintage 74LS123 and 74LS132 to ‘signal condition’ so I got two outputs: the raw signal which has PWM (brightness) and a sequence with a pure on/off, stripped from the PWM.

I found no reoccurrence during those two minutes 🤷🏼‍♂️
So the random generator is likely based on some analogue circuit rather than being shift register based.

Other fun facts: the raw PWM frequency is about 350Hz. I found PWM levels (brightness) from 30% to 90%. It’s mostly 100% on though, only occasionally dipping at those random (flickery) events.
And everything in the flicker timing seems to revolve around intervals of 100ms, occasionally a 50ms offset may be added/subtracted, but only once in a while.. 🤔

#electronics #testandmeasurement #xmas #engineer #digilent #siglent #electronicscuriosities

A nice infographic from #digitaldiscovery the #RoyalSocietyofChemistry journal I am an EIC for. We promote our work this way to make it accessible. Stay tuned for more from us here in the Fediverse! This one in particular is about data representations of molecular spectra.

https://blogs.rsc.org/dd/2023/01/09/research-infographic-plot2spectra/

#chemistry #molecules #automation #realtimechem