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Alan Adamsky

Alan Adamsky is a power-supply consultant with Spectral Engineering Inc., Newton, Mass. He received a BEE from the City College of New York.


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  • Build Your Own Low-Cost Driver For A Synchronous Rectifier

    Build Your Own Low-Cost Driver For A Synchronous Rectifier

    By Alan Adamsky, June 04, 2010

    Analysis of desigh considerations in a simple half-wave driver circuit for a rectifier in which switching transistors are driven on and off to emulate the behavior of diodes.

  • Battery Simulators Check Out Chargers, Over-Discharged Batteries

    By Alan Adamsky, August 27, 2009

    The two battery-simulator circuits described here can help you quickly test a battery charger under a normal battery condition and an over-discharged battery condition. The circuits let you set any voltage to see how the device under test works.

  • Add Two Components To Power Supply To Ensure Proper Voltage Sequencing

    By Alan Adamsky, September 01, 2007

    Today's digital ICs typically demand complex voltage sequencing, a task that usually requires dedicated ICs or microprocessors. But what if your requirements are more modest? The sequencing scheme presented here requires only a single optocoupler and

  • Simplified AC Line Sensor Uses Few Parts, Little Real Estate

    By Alan Adamsky, January 18, 2007

    Typically, ac line sensors use comparators. But I had to design a power supply to be as low in cost as possible, be self-powered, use through-hole components, and take up as little space as possible on a small two-sided pc board. So I developed the

  • Averaging Improves Regulation Of Second Power-Supply Output

    By Alan Adamsky, August 03, 2006

    A switching power supply's main output usually will have a load regulation of better than 0.1%. However, what if it doesn't need regulation that tight on the main output, but instead needs better regulation on a second output? The averaging technique desc