Archive for date: May 19, 2011

An improved linear current LED transmitter

May 19, 2011 | electronics, My Projects | By: Mark VandeWettering

I spent some time reading KA7OEI’s great article on creating a good linear current driver for an LED or laser based communication system. The basic idea was pretty straightforward, so I decided to try it out when I got home. The “simple” circuit that I had before was in no sense linear: the audio became […]

KA7OEI – LED Linear Current Modulator

May 19, 2011 | Amateur Radio, electronics | By: Mark VandeWettering

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 […]