DIY stroboscope

stroboscope_panel1

ReturnZero published a stroboscope build:

At its heart, a stroboscope is just a rectangular wave generator hooked up to a light source. I wanted a few extra features to make it nice to use:

  • Ability to set flash rate by either frequency or RPM
  • Set duty cycle of output without affecting flash rate
  • LCD display

– 2×16 for displaying RPM, frequency and duty (one per line, so one will be hidden at any time)

  • Rotary encoder (with button) for main interface

– When button is not pressed, knob will increase/decrease the value of the selected digit
– When button is pressed, rotating knob will scroll through display digits

  • Buttons for quickly halfing/doubling thirding/trebling the flash rate

– This is useful for checking that you haven’t hit on a multiple of the rotation rate

  • Nice beefy output stage for switch big sets of LEDs

 

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