Alan Stummer
Research Lab Technologist


Green Lantern - LED Flasher

Warning:  This is a work in progress.  Take everything with a grain of salt!

I am curious who uses what.  Are these webpages a waste of time, or are they any help to others?  Are the circuits, software and utilities appearing in other labs?  Please send your comments or suggestions or what you have used (or not) or schematics of your version or pictures or anything!   Email me, or be creative and send a postcard! I want to hear from the vacuum! Links
  • Overview

NOTICE: This webpage and associated files are provided for reference only.  This is not a kit site!  It is a collection of my work here at the University of Toronto in the Physics department. If you are considering using any schematics, designs, or anything else from here then be warned that you had better know something of what you are about to do.  No design is guaranteed in any way, including workable schematic, board layout, HDL code, embedded software, user software, component selection, documentation, webpages, or anything.

All that said, if it says here it works then for me it worked. To make the project work may have involved undocumented additions, changes, deletions, tweaks, tunings, alterations, modifications, adjustments, waving of a wand while wearing a pointy black hat, appeals to electron deities and just plain doing whatever it takes to make the project work.

Started 2013 April for Andrés Covarrubias in Robin's lab.  A TTL input turns on an external LED at several amps for less than 1uS.  This is used as a probe to illuminate the abblation process.  The TTL input goes directly into a ADP3624ARH non-inverting FET driver.  The driver turns on the gate of a IRF540N FET, configured as a low side switch, which conducts the current through the external LXML-PM01-0100 LED.  On the source of the FET is a Kelvin 0.1 Ohm current sense resistor with a BNC for a scope to monitor the current.  Be sure to terminate the 'scope in 50 Ohms.

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