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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 »

 

Programmable logic leads the pack
Given its flexible nature and popularity, it's no surprise that programmable logic figures prominently in a growing number of Design Ideas, including two in this new batch. In addition, EDN readers show us how to build a cheap and easy inductance tester, add a manual reset to a standard three-pin-reset supervisor, and obtain hex-code values for a microcontroller's ADC voltages.Jeremy Willden of ad hoc Electronics, Pleasant Grove,... (more) Details... more »

 

A new use for analog oscilloscopes; generating pseudorandom sequences at 1.5 Gbps; and the extremely rare EDA-related Design Idea
In the latest batch of Design Ideas, Antonio Eguizabal of Freescale Semiconductor sent in Oscilloscope helps obtain Bode plots in non-50-ohm environments. As an alternative to building or purchasing custom buffer amplifiers, you can use the near-ideal amplifiers in an analog oscilloscope that provides a vertical amplifier output on its rear panels—fo... (more) Details... more »