# Robotdyn ac dimmer
**URL:** https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150
**Category:** General
**Created:** [15 May 2019 09:03 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150 "2019-05-15T09:03:07Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@mjdula](https://discourse.nodered.org/u/mjdula)
#### Post date: [15 May 2019 09:03 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/1 "2019-05-15T09:03:08Z")
Hey all,
Newbie to the node red programming and working through it pretty well. I am wanting to create a reptile environment control system using a Robotdyn AC dimmer. I was wondering if anyone has used this or a similar hardware product. I want to use it to adjust the voltage and dim ceramic heat lamps to sustain a constant temp. My questions is if anyone has created a node that can adjust a PWM with zero point. I have no knowledge of creating nodes just using them.
> **[AC Light Dimmer Module, 2 Channel, 3.3V/5V logic, AC 50/60hz, 220V/110V](https://robotdyn.com/ac-light-dimmer-module-2-channel-3-3v-5v-logic-ac-50-60hz-220v-110v.html)**
>
> This is the good old AC Dimmer, but with 2 channels.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [16 May 2019 08:22 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/2 "2019-05-16T08:22:05Z")
If you know how to drive the PWM then `` I suggest node-red-contrib-pid `` for controlling it. You haven't said what device you are going to run on. I assume something like a Pi, in which case you could use a DS18B20 temperature sensor.
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### Author:  [@mjdula](https://discourse.nodered.org/u/mjdula)
#### Post date: [16 May 2019 09:08 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/3 "2019-05-16T09:08:49Z")
Hey thanks colin,
I am a pi 3b with the ds18b20.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [16 May 2019 20:54 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/4 "2019-05-16T20:54:09Z")
I believe the standard GPIO node will do PWM.
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### Author:  [@mjdula](https://discourse.nodered.org/u/mjdula)
#### Post date: [17 May 2019 06:17 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/5 "2019-05-17T06:17:00Z")
Do you know how I could regulate, dim or adjust ac voltage without the device inward discussing
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [17 May 2019 06:28 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/6 "2019-05-17T06:28:59Z")
Sorry, I don't understand the question.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [17 May 2019 06:33 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/7 "2019-05-17T06:33:42Z")
If you are asking how you might control the heater without the dimmer then the way I do it is using node-red-contrib-timeprop in conjunction with node-red-contrib-pid. Then you can control the heater with a relay output in the pi or an SSR.
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### Author:  [@Moosbueffel](https://discourse.nodered.org/u/Moosbueffel)
#### Post date: [28 September 2022 16:20 UTC](https://discourse.nodered.org/t/robotdyn-ac-dimmer/11150/8 "2022-09-28T16:20:34Z")
@mjdula Have you realiszed it? I want to make some similar to adjust my to use only Photovoltaic. Do you have an excample flow for me, which I can use as a template. Or any other!?
This is a really cheap, well dimmer, so perhaps someone else use this.
Thanks