Pulse-width modulation (PWM) is an efficient method for controlling the light intensity of a lamp or the speed of a simple DC motor. It lets you take advantage of the load's inertia by switching the ...

Part 4 of this series recognizes that, in spite of all efforts to keep the EMI and RFI from corrupting the sensor signals on their way from signal source to the signal conditioning instrumentation.

In LCD backlight applications, a dc-to-ac inverter drives cold-cathode fluorescent lamps. The inverter's input comes from the display's power supply. Currently, it spans from 12 to 18 V. Pulse-width ...