HOWTO make an "Easy PPM/Saltwater Tester"

By at 8:54 am Friday, Jan 13


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.
Link

Xeni Jardin

Boing Boing partner, Boing Boing Video host and executive producer. Xeni.net, Twitter, Google+. Email: xeni@xeni.net.

Comments are closed.

Where not otherwise specified, this work is licensed under a Creative Commons License permitting non-commercial sharing with attribution. Boing Boing is a trademark of Happy Mutants LLC in the United States and other countries.