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ALTERNATING DAISY CHAINED WIRING TECHNIQUE AND FLAT CABLE TESTER

IP.com Disclosure Number: IPCOM000005468D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2001-Oct-10
Document File: 2 page(s) / 69K

Publishing Venue

Motorola

Related People

Stephen Strom: AUTHOR

Abstract

A pictorial representation of an alternating daisy chained wiring technique is shown. What makes this concept unique is the method in which the conductors are wired together. Using this wiring tech- nique, it ispossibletoconstruct flat cable and dip switch testers with simplified circuitry.

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ALTERNATING DAISY CHAINED WIRING TECHNIQUE AND FLAT CABLE TESTER

By Stephen Strom

    A pictorial representation of an alternating daisy chained wiring technique is shown. What makes this concept unique is the method in which the conductors are wired together. Using this wiring tech- nique, it ispossibletoconstruct flat cable and dip switch testers with simplified circuitry.

   In using the technique, a positive voltage should be applied between points A and D. If the current flows in the approprfate direction between B and C, then the conductors are considered to be functional. The reason why this technique is so advantageous over present wiring techniques is that in order for the current to flow correctly between B and C, there cannot be any inter-conductor shorting or discon- tinuities. Thus, the circuit can simultaneously check for both shorting and discontinuity failure mechanisms.

   Inter-conductor shorting within the assembly causes points A, B, C and D to be shorted together, thus causing no current to flow between B and C. Any conductor discontinuities will also cause current not to flow between points Band C.

   The Flat Cable Tester employs the alternating daisy chained wiring technique. This technique simplifies the design of the tester and permits it to test for both Inter-conductor shorting and discon- tlnuities.

   The Figure portrays a flat cable and the direction of current flow through the cable. The LED is used to sense if there is current flow in the appropr...