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IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now. Visit Preferences to set your user name Summary of change: I'm trying to connect HALL to both primary and secondary inputs on my development board. http://www.vems.hu/files/FredrikJagenheim/hall30.jpg '''Trigger1:''' Pin is connected to IC by 10k R55 and shorted SJ2. It's protected by a 5.1V zener on D14 and a short on D13. It's pulled up by a 10k R88 and shorted SJ6. '''Trigger2:''' Pin is connected to IC by 10k R91 and shorted SJ5. It's protected by a 5.1V zener on D27 and short on D24. It's pulled up by a 10k R59 and a short on SJ7. '''The result''' The board boots, but doesn't run lcd_update. Stuck in primary/secondary trigger handler? This happen even if I disconnect the trigger pins; so I guess I've botched the pull-up. I have; the signal should look like this 'hall signal -> pulled up by 10k to 5v -> 10k series resistor -> 5v1 zener to ground -> ic1 pin'. Thanks, Dave. '''Schematic diagram showing the recommended hall setup''' [http://www.vems.hu/files/DaveBrul/mini_hall.JPG hall schematic diagram] Optional: Add document to category: Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.