Accession Number:

ADA055872

Title:

Automatic Data Acquisition System for an LED Test

Descriptive Note:

Final rept. Apr 1976-Sep 1977

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1978-06-01

Pagination or Media Count:

44.0

Abstract:

The object of the work performed was to develop a computer controlled data acquisition and data analysis capability for an uninterrupted 6,000 hour test to monitor the degradation of approximately 250 infrared light emitting diodes LEDs. The test program comprised subjecting a sampling of 254 diodes to preselected constant currents and temperatures while periodically measuring the voltage drop and the light output of each of the diodes. To perform the data acquisition portion of this effort, an automated data acquisition system was designed around a Hewlett-Packard 2100A computer. This system utilized a 1,000 point random access multiplexer, a 16-bit Relay Output Register and a digital voltmeter for data acquisition and transmission. Special purpose assembly language inputoutput routines were written for the computers BASIC Interpreter to make this special equipment accessible to the computer. The Control program handled data storage to meet the requirements specified for the project.

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Computer Hardware
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE