Alan Adamsky is a power-supply consultant with Spectral Engineering Inc., Newton, Mass. He received a BEE from the City College of New York. Email address: ama@spectraleng.com
2 results found for Alan Adamsky, displaying items 1 - 2
August 27, 2009[Ideas For Design] Battery Simulators Check Out Chargers, Over-Discharged Batteries
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. As shunt regulators, the circuits provide what is referred to, in expensive active power-supply loads, as constant voltage mode. Best of all, the regulators were thrown together with parts lying around my lab. The...
September 1, 2007[Ideas For Design] Add Two Components To Power Supply To Ensure Proper Voltage Sequencing
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 a resistor. Assume that the dc-dc converter's On/Off pin is pulled low to turn on and floats to remain off (see the figure). Also, in this example, the 5 V needs to turn on before the...
