- Very interesting and cheap DIY EKG monitor. Beats the $4K the charge hospitals. http://www.swharden.com/blog/2009-08-14-diy-ecg-machine-on-the-cheap/ 17 comments electronics
- Microcontroller/PC Communication using a supercheap USB Sound Card http://www.swharden.com/blog/2011-07-09-sound-card-microcontrollerpc-communication/ 7 comments electronics