How to test the Geode trigger circuit - Hardware https://www.geometrics.com/community/geode-hardware/how-to-test-the-geode-trigger-circuit/ Geometrics Discussion Board en-US Wed, 19 Aug 2026 02:51:43 +0000 wpForo 60 How to test the Geode trigger circuit https://www.geometrics.com/community/geode-hardware/how-to-test-the-geode-trigger-circuit/#post-1215 Mon, 17 Mar 2025 20:09:53 +0000 The trigger connector utilizes pins A and B. When tested with a DC multimeter on a functional trigger circuit, you should observe approximately 4.5 VDC between these two pins.

To verify that the external trigger is being received, you can momentarily short pins A and B while the Geode and SCS software are running on your PC. (A paperclip is commonly used for this purpose.) Each time the pins are shorted, the unit should successfully trigger.

For reference, the part number for the trigger connector/cable assembly is:

PN 840-00556-01 — ASSY, CABLE, TRIGGER INPUT, GEODE

126 127]]> Hardware Kolby Pedrie https://www.geometrics.com/community/geode-hardware/how-to-test-the-geode-trigger-circuit/#post-1215