Microcomputer-controlled circuit tester

Details Microcomputer-controlled circuit tester Microcomputer-controlled circuit tester

1980-09-03

1982-12-07

Smith, Jerry

Boots, shoes, and leggings

371 20, 324 73R, 324 51, 364579, G05B 1902

Patent

active

043631053

ABSTRACT:
To test the integrity of a plurality of operating circuits each including a load energizable by an associated driver under the control of a microcomputer, a capacitor charged with unipolar pulsating test voltage is connected to a common terminal of all the operating circuits and concurrently therewith to the input of a trigger element whose threshold equals about half the peak amplitude of that voltage. During one or more brief intervals the microcomputer cuts in the driver of a selected circuit and senses the output voltage of the trigger element to determine whether or not the capacitor is being discharged through that circuit. A display device controlled by the microcomputer indicates the conductive or blocked state of the selected circuit as well as a possible malfunction manifesting itself in a discharge of the capacitor before any driver is turned on.

REFERENCES:
patent: 3258613 (1966-06-01), Felcheck
patent: 3590370 (1971-06-01), Fleischer
patent: 3760265 (1973-09-01), Hutch
patent: 3973184 (1976-08-01), Raber
patent: 4245319 (1981-01-01), Hedges
Millman, J. and Halkais, C., Integrated Electronics, N.Y., McGraw-Hill, 1972, pp. 583-585.

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