# Clutch Switch isnt going back to 0

**URL:** <https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841>\
**Category:** EMU PRO\
**Created:** [March 8, 2024, 7:58am UTC](https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841 "2024-03-08T07:58:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Martin](https://avatars.discourse-cdn.com/v4/letter/m/73ab20/32.png) [@Martin](https://community.ecumaster.com/u/Martin)\
**Post date:** [March 8, 2024, 7:58am UTC](https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841/1 "2024-03-08T07:58:51Z")

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Hey i recognized a Problem with the clutch switch Setting(Clutch disengaged). If I’m starting the EMU the state is “0” till i press the clutch once. Then the state jumps to “1” and isn’t going back to 0 till i restart the EMU.

 ![Screenshot 2024-03-08 085746](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/1X/69150a918e32c3d41886563e1b5200b0ee49aa7b.png)

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**Author:** ![mkuklis\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/mkuklis_ecumaster/32/104_2.png) [@mkuklis\_ECUMASTER](https://community.ecumaster.com/u/mkuklis_ECUMASTER)\
**Post date:** [March 8, 2024, 10:51am UTC](https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841/2 "2024-03-08T10:51:34Z")

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If you use a switch to ground, you have to enable a pull-up resistor.  
Without it, you always have ground on the input.

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<div class="post-metadata">

**Author:** ![Martin](https://avatars.discourse-cdn.com/v4/letter/m/73ab20/32.png) [@Martin](https://community.ecumaster.com/u/Martin)\
**Post date:** [March 9, 2024, 4:52pm UTC](https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841/3 "2024-03-09T16:52:08Z")

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i’m using an inversted +5V signal for my clutch.  
The Problem is the state jumps from 0 to 1 (Sensorvoltage changes form 5 to 0 when clutch is pressed) at the first time the clutch is actuated after EMU reset. When I release the clutch again the Sensor value changes again from 0 to 5 Volts but the “Clutch disengaged State” stays at one and doesn’t go back to 0 till i restart my Emu.

 ![grafik](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/1X/5133577eaf7612056129a2e68b17caa32b570348.png)

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<div class="post-metadata">

**Author:** ![mkuklis\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/mkuklis_ecumaster/32/104_2.png) [@mkuklis\_ECUMASTER](https://community.ecumaster.com/u/mkuklis_ECUMASTER)\
**Post date:** [March 11, 2024, 10:41am UTC](https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841/4 "2024-03-11T10:41:40Z")

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I just saw that you have hysteresis set to 2.5 V. That’s your problem.  
The default is 0.5 V.

Why do you have it changed?  
Or was it by mistake?

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**Author:** ![Martin](https://avatars.discourse-cdn.com/v4/letter/m/73ab20/32.png) [@Martin](https://community.ecumaster.com/u/Martin)\
**Post date:** [March 28, 2024, 7:40pm UTC](https://community.ecumaster.com/t/clutch-switch-isnt-going-back-to-0/841/5 "2024-03-28T19:40:14Z")

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Thanks, it was the solution