# (Variable) Rate control

**URL:** <https://discourse.agopengps.com/t/variable-rate-control/373>\
**Category:** Feature requests\
**Created:** [5 November 2019 22:19 UTC](https://discourse.agopengps.com/t/variable-rate-control/373 "2019-11-05T22:19:09Z")\
**Posts on this page:** 1\
**Showing post:** 886

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**Author:** ![SK21](https://discourse.agopengps.com/letter_avatar_proxy/v4/letter/s/d78d45/32.png) [@SK21](https://discourse.agopengps.com/u/SK21)\
**Post date:** [26 April 2024 14:05 UTC](https://discourse.agopengps.com/t/variable-rate-control/373/886 "2024-04-26T14:05:58Z")

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Yes that could help.

> [@RC12 rate control flow meter question](https://discourse.agopengps.com/t/rc12-rate-control-flow-meter-question/16076):
>
> I have a question about flow meter hook up to the RC12 rate control board. I want to use it with a Micro Trak brand flow meter. The flow meter operation is similar to a Raven. The unit grounds out the signal wire every time the magnet on the turbine goes by to create a pulse. I can’t read flow with that flow meter. I looked at the schematic. I see the opticoupler is grounded to the board and it appears it is set up to see a positive voltage pulse instead of a grounded pulse. Is there a way to ut…

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