Ken Whiteleather is a senior electrical engineer with Sparton Electronics, Government Systems, in DeLeon Springs, Fla. He received a BSEE from the University of Florida, Gainesville. Email address: KWhiteleather@sparton.com
2 results found for Ken Whiteleather, displaying items 1 - 2
November 7, 2008[Ideas For Design] Design A Low-Cost 4- To 20-mA Receiver Circuit For Control Loops
Current-mode control loops (particularly the popular 4- to 20-mA controls) are used in many industrial applications because of their immunity to induced EMI from motors, contactors, relays, and other sources. Off-the-shelf process controllers often have 4- to 20-mA (sometimes 0- to 20-mA) output options for adjusting speed, pressure, temperature, or some other parameter in a closed-loop control system. The receiving circuit needed for the 4- to 20-mA control...
September 27, 2007[Ideas For Design] Hardware-Based LED Blinking Control Eliminates Software Overhead
LEDs are often used on manmachine interfaces (MMIs) or device front panels to illuminate switches or backlight text information so that the user knows what the device is supposed to be doing at the time. Occasionally, the designer wants these LEDs to start blinking at a particular rate to alert the user to a condition needing attention, such as a low battery. Many devices use embedded microprocessors or microcontrollers to handle the MMI, along...
