MembersPage/FredrikJagenheim/BuildDevelopmentBoard (2006-03-16 04:43:08)

I'm trying to connect HALL to both primary and secondary inputs on my development board.

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

[hall schematic diagram]