KA7OEI – LED Linear Current Modulator
My silly experiment with an LED communicator naturally led me to looking up more complex (and better engineered) versions of the same kind of circuit. There are now cheap LEDs that can emit a watt or more of energy, and produce a prodigious amount of light. It seems like an area which is ripe for amateur experimentation (and just general mucking around) and could leverage some of my optical design skills as well. KA7OEI has some really good ideas and circuits for driving these kind of LEDs with as little distortion as possible, and will be definitely worth looking at: