Make-Technology-On-Your-Time-Volume-29-O-Reilly-9781449309947-Mark-Frauenfelder-2012-176-pages-br-br-Make-is-a-quarterly-magazine-for-the-professional-&-hobbyist-&-is-devoted-to-do-it-yourself-technology-projects-This-29th-edition-features-topics-such-as-taking-bio-hacking-to-a-new-level-an-introduction-to-DIY-tracking-devices-learn-how-to-build-&-ECG-machine-to-study-heartbeats-&-assemble-a-DIY-bio-lab-in-order-to-study-athletic-motion-using-consumer-level-hardware-M