GSP flasher unit

The question of "exactly when was this image taken?" can be crucial to interpreting the results of astronomical photography. One way to assign an accurate time to each exposure involves a device which produces brief flashes of light at VERY precisely known intervals.

• Overview and construction guide for the flasher (PDF)
• Text output of an example run of the unit
• Annotated output of an example run of the unit
• Video of Aart explaining the device (warning: may be a slightly earlier version of the unit)

For more information:

• "Aart's Arduino Timers" folder
  This collection of documents on the IOTAoccultations groups.io page describes the design of this little unit, and provides instructions on how to build it.

This page maintained by Michael Richmond.