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Medieval theologians may have argued about how many angels could dance on a pinhead, but contributors to Design Ideas seem focused on driving more LEDs with fewer microprocessor I/O ports. Here we go again, with the latest and possibly last (for a while) entry in the category. This time, authors Nedjeljko Lekic and Zoran Mijanovic show us that “Three microcontroller ports drive 12 LEDs Details... more...

Here in the United States, people celebrate late November’s Thanksgiving holiday by cooking a turkey. By the first of December, the leftovers are mostly gone and the picked-over carcass awaits the soup pot. This fortnight’s Design Ideas have already landed in the EDN stewpot, and there’s not a turkey in the bunch.If you’re stuffing a class-D amplifier in your latest product, youR... (more) Details... more...

What’s your least favorite electronic component? If it’s resistors, you’re in luck. Author Martian Stofka follows up his earlier contribution, Gain-of-three amplifier requires no external resistors, with a variant-- this Gain-of-two inst... (more) Details... more...