UncategorizedEasy to Make Door Electronic Alarm January 22, 2019 fjm1972 10 PCB´s for $2: https://jlcpcb.com Support Ludic Science on Patreon: https://www.patreon.com/ludicscience Like this:Like Loading... Related Famous Words of Inspiration..."We ourselves feel that what we are doing is just a drop in the ocean. But the ocean would be less because of that missing drop." Mother Teresa — Click here for more from Mother Teresa Published by fjm1972 View all posts by fjm1972