William Grill is a senior electrcal engineer with Honeywell BRGA, Olathe, Kansas. He received a BSEE from the University of Colorado, Boulder. Also, he has published over a dozen application design ideas and articles. Email address: william.grill@honeywell.com
5 results found for William Grill , displaying items 1 - 5
July 9, 2009[Ideas For Design] Programmable Window Comparator Uses A Single Reference
A voltage monitor is a common hardware need. But beyond a simple compare, many systems must provide a tolerance around a specific value. Specifications of 2%, 5%, or 10% typically require a windowed comparator, with a voltage reference and resistive divider components for setting the tolerance. All are available in many forms. The controller described here, based on the Microchip 12F675, allows the user to dynamically select the window characteristic as a ...
December 11, 2008[Ideas For Design] Controller Maps Auto's Electric Drive Voltage To Existing Thermal Fuel Gauge
While converting an older Volkswagen to electric power, we wanted to display the battery voltage on the existing fuel gauge. The gauge used an electromechanical regulator to resistively control the heating of a bi-metallic thermal strip. The regulator is periodically pulsed by the vehicle’s 12-V battery power. The conversion application provides a proportional control uniquely coded to synchronize and scale into the vehicle regulator’s proportionalcontrolled ...
October 26, 2006[Ideas For Design] Controller-Based One-Shot Creates Extended Delays While Saving Space
When I needed to create a simple tool to generate a long, event-triggered pulse, I started with a classic one-shot and a really large capacitor. This worked "pretty good," owing to the classic nature of the problem. There seemed to be no enthusiasm for using a small controller to provide the one-shot function, though. Nonetheless, there may be several advantages to doing so. Generally, larger caps have a wide initial tolerance and variation over temperature,...
June 22, 2006[Ideas For Design] PWM-To-RS-232 Translator Boasts Over 11-Bit Accuracy
WILLIAM GRILL, Honeywell Aerospace-Olathe, Olathe, Kansas william.grill@honeywell.com Over the years, many sensor monitor designs would have benefited by being able to have their encoded pulse-width modulation (PWM) data forwarded to and post-processed by a PC-based host. However you encode the PWM information, the PWM-to-RS-232 translator described here has a small footprint and a total cost under a few...
June 23, 2005[Ideas For Design] Handy Circuit Converts RS-232 To An 8-Bit Discrete Output
This simple serial RS-232-to-discrete-output application and driver, based on Texas Instruments' 74LV8153, requires only a minimum of parts. The single-wire, RS-232 bit-compatible 74LV8153 supports an internal clock, auto-baud function, and output registers. Graphic control written in Visual Basic (VB) gives this implementation a Windows-based feel. The circuit is intended as a resource for bench-switch or power-supply controls. Referring to the schematic in ...
William Grill is a senior electrcal engineer with Honeywell BRGA, Olathe, Kansas. He received a BSEE from the University of Colorado, Boulder. Also, he has published over a dozen application design ideas and articles.
