Like an old player piano this light sequencer uses a large drum and physical contacts. Looks like a bit of a fire hazard but its fascinating to see!
From thatwasDope on YouTube
You can learn more about this method from this post on Nandita Palchouchuri
Around 1960-65, as a result of the ingenuity of pioneers like Sridhar Das and a handful of others ,festive decorations using large electric bulbs began to emerge.They were created in order to embellish the temporary Cloth Temples(Pandal)that house the deity Goddess Jagadhatri and Goddess Durga during the Dushehra festival, each year.
With passing years these panels have become very intricate and cleverly designed and occupy a very integral part in the making of the Durga festival ,diwali ,wedding marquees etc. A large number of contractors building these light panels now thrive in Bengal largely centred around Chandannagar.
And a good discussion on the forum here: Identifying a vintage lighting sequencer method
Thankfully if you want to create an impressive lighting display you won’t need to rely on such an elaborate set-up.
We just love sticking NeoPixels anywhere and everywhere. When we saw the new “PIO” feature of the RP2040 from Raspberry Pi, we knew it would be perfect for driving huge numbers of NeoPixels. So we created the Adafruit Feather RP2040 SCORPIO specifically for NeoPixel (WS2812-compatible) control, but also good for various other PIO-based projects that want to take advantage of the Feather pinout with an additional 8 consecutive outputs (or inputs).
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