µP-Controlled Router Base

Engineering students at MIT have developed a hand-held computerized router that can precisely cut out or rout practically any shape on any size wood (or plastic, foam, whatever) based on a digital map of the pattern and the work surface. Strips of encoded tape are positioned on the material and then the router follows the tape. Notice while watching the video that the router moves around on the base unit. The operator's job is to keep the router near the center of the base so it doesn't move against a hard stop at the edge of the base. This type of function is traditionally performed with an X-Y plotter type system that automatically moves the bit across the work piece; they can cost tens or hundreds of thousands of dollars, depending on the size. Depending on your patience and skill, an entire 4x8-foot sheet of plywood could be handled if desired. I'm guessing this device, once productized and made in China, will sell low end in Sears for about $150.

Posted August 2012

Werbel Microwave power dividers, couplers - RF Cafe Website

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...