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Mixed signal circuits put you in control
This week's batch of Design Ideas contains several mixed-signal ideas. First up, Ahmad Ayar, of Maxim Integrated Products in Sunnyvale, CA presents "Linear-brightness controller for LEDs has 64 taps." Applications that include LEDs but no microcontroller (or other form of control intelligence) can benefit from a simple circuit that provides manual c... (more) Details... more...
Returning trio tackles PWM regulators, current monitoring, digital I/O
Editor's note: Chuck Small has taken over Design Ideas editing duties from Brad Thompson.This week's new batch of Design Ideas features a trio of returning authors.First up, Grant Smith of National Semiconductor, in "Current mirror improves PWM regulator's performance," virtually halves the component count of the feedba... (more) Details... more...
Authors depict novel uses for standard parts
Designers use ballast ICs, such as International Rectifier's IR53HD420, in CFLs (compact fluorescent lamps) for heating the filaments, igniting the lamps, and supplying the lamps with current. Manufacturers produce these ICs in high volumes, and they cost approximately $2. Author Christian Rausch in Use a CFL ballast to drive LEDs shows how you can use a CFL... (more) Details... more...