# Grade control

**URL:** <https://discourse.agopengps.com/t/grade-control/1702>\
**Category:** Project ideas - in progress\
**Created:** [14 April 2020 17:51 UTC](https://discourse.agopengps.com/t/grade-control/1702 "2020-04-14T17:51:12Z")\
**Posts on this page:** 1\
**Showing post:** 377

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**Author:** ![ChrisC](https://discourse.agopengps.com/letter_avatar_proxy/v4/letter/c/8baadc/32.png) [@ChrisC](https://discourse.agopengps.com/u/ChrisC)\
**Post date:** [24 October 2021 17:41 UTC](https://discourse.agopengps.com/t/grade-control/1702/377 "2021-10-24T17:41:06Z")

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I originally was going to look into can, but there is a simpler way… all deere, cnh, and cat tractors made in the last 15 years come with a scraper interface… basically you plug and play. [DAC 8000 Wired - Manuals](https://manuals.rustsales.com/hardware-install-manual/h-wiring-diagrams/h-dac-8000-wired/)

Not sure of the wiring for cnh or cat but here is the configuration of deere

 ![IMG_20211024_123559](https://discourse.agopengps.com/uploads/default/original/2X/0/0e515a6c528551be823a724d6e8829141682186c.jpeg)

It is a 5v analog input that doesn’t like extremes. So 0-2.5v controls one direction and 2.5-5 controls another…  
CNH and JD have a dead band from ~2.25 – 2.75 volts, this varies some from tractor to tractor.

CNH and JD will through error codes if the voltage sent \< .5 or \> 4.5.

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