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Circuit Net Detector Module

IP.com Disclosure Number: IPCOM000087401D
Original Publication Date: 1977-Jan-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Radzik, EP: AUTHOR

Abstract

This arrangement facilitates rapid open/short checking of circuit cards and boards. It avoids tedious point-to-point checking and the use of expensive test equipment.

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Circuit Net Detector Module

This arrangement facilitates rapid open/short checking of circuit cards and boards. It avoids tedious point-to-point checking and the use of expensive test equipment.

When a dual-in-line circuit card or board with pluggable sockets is fabricated from a print or wire-run list, there is a probability that there will be errors in the interconnections made. These may be connections going to the wrong place, missing connections or physically open and short circuits.

A simple tool 10 is proposed to facilitate the checking of these circuit cards or boards when produced in low quantities. In actual production runs the testing would be done by production tools which are expensive and require software support and other constraints.

The arrangement is packaged in a dual-in-line module with one light-emitting diode (LED) 12 indicator for each pin 14. The anode 16 of each LED is connected to a different pin, and the cathodes 18 are connected together to a ground plane contact 20 in the center of the module, and are also connected to a pin 22 on the top of the module (Fig. 1). The number of pins 14 per package depends, of course, on the application. The wiring diagram for a 16-pin module is shown in Fig. 2.

The circuit net detector module 10 is used as follows: 1. a) Insert one circuit net detector module 10 in each location used. b) If the circuit card or board does not have a ground plane, connect the topside ground pin 22 of the module to common....