Boing Boing reader XeneX says,
My girlfriend continually wows me with her amazing ideas and projects. Here she shows how to make a low-budget PPM meter using items most geeks already have laying around.
Boing Boing reader XeneX says,
My girlfriend continually wows me with her amazing ideas and projects. Here she shows how to make a low-budget PPM meter using items most geeks already have laying around.