Elehobica's LED Stroboscope is Music to Your Ears for Vinyl Turntable Tuning
Pseudonymous maker "Elehobica" has designed a tool that uses persistence of vision to check if your vinyl turntable is rotating at the right speed — without the need for an external stroboscope.
"You already know how a strobe pattern on a turntable appears to stand still. But what if it was the light source itself instead of the printed pattern? The ring of light on this PCB is that answer," the maker explains. "Drop the 100mm disc onto your platter, flick the slide switch to 33⅓ or 45 [revolutions per minute], and a ring of green LEDs starts flashing at a crystal-locked frequency. If the dot pattern stands still, you're golden. If it drifts, time to reach for the speed trim pot."
The rotational speed of a turntable is important: too fast or too slow, and it will shift the pitch of the music to match. Traditionally, the way to...
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