# Let's design IR control Board
**URL:** https://metastudio.org/t/lets-design-ir-control-board/11425
**Category:** MakerSpace Chat
**Created:** [March 28, 2021, 11:42am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425 "2021-03-28T11:42:25Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [March 28, 2021, 11:42am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/1 "2021-03-28T11:42:25Z")
I try to design a PCB for home Automation,
so I use IR receiver and remote,
microcontroller (Atmega328),
TRIAC (BT136),
Optocoupler (moc3021)
Circuit Diagram
[IR Remote Control Sch.pdf](https://metastudio.org/uploads/short-url/ltuS53YZEr3iIuQyIc0hhppDiTm.pdf) (111.8 KB)
Board
[IR Remote Control Board.pdf](https://metastudio.org/uploads/short-url/w9T7V7j9Qf4nhBscV7fvylW96Bv.pdf) (19.2 KB)
kicad 3d View
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [March 29, 2021, 5:41pm UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/2 "2021-03-29T17:41:23Z")
**_[size=4]PCB[/size]_**
😍 😍
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### Author:  [@jtd](https://metastudio.org/u/jtd)
#### Post date: [April 2, 2021, 7:32am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/3 "2021-04-02T07:32:44Z")
> [@Farhan](#):
>
> Circuit Diagram
Pleas add snubber circuit on MT1-MT2 of triac. Especially if the load is inductive.
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [April 2, 2021, 2:46pm UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/4 "2021-04-02T14:46:27Z")
Thank you sir,
I add Snubbar Circuit.
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [April 2, 2021, 2:46pm UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/5 "2021-04-02T14:46:51Z")
[https://www.youtube.com/watch?v=bTcXnkTGaxI](https://www.youtube.com/watch?v=bTcXnkTGaxI)
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [April 10, 2021, 10:09am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/6 "2021-04-10T10:09:28Z")
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [April 10, 2021, 10:14am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/7 "2021-04-10T10:14:02Z")
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [July 4, 2021, 6:24am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/8 "2021-07-04T06:24:45Z")
New schematic diagram With **Ac Dimmer** and **snubber circuit** ,
@jtd @Ashish_Pardeshi @karnamdpdurga @ravi312
[sch.pdf](https://metastudio.org/uploads/short-url/ooZo2WbDN4OaUAXYF4rMUG1Aihq.pdf) (127.7 KB)
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [July 4, 2021, 7:35am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/9 "2021-07-04T07:35:00Z")
[https://youtu.be/IWymWHE\_wsg](https://youtu.be/IWymWHE_wsg)
Playing with eeprom (last event record)
[https://youtube.com/shorts/te9Jktd6qNw?feature=share](https://youtube.com/shorts/te9Jktd6qNw?feature=share)
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### Author:  [@jtd](https://metastudio.org/u/jtd)
#### Post date: [July 6, 2021, 6:27pm UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/10 "2021-07-06T18:27:48Z")
Nicely done schematic.
I cannot see the snubber capacitors on the board. What is their rated voltage?
Also the snubber resistor, what is the rated voltage and wattage.
I recently purchased a fan dimmer from amazon - too tied up to make one. The device started misbehaving. It would not turn on the fan when the pot was kept at lower speed. But once the pot crossed about 50% the fan would run full speed.
The pot itself was ok. But the snubber resistor had arced. It was an open resistor. Such arcing is happens when ordinary resistors not rated for 600V operation are used in mains circuits.
How does one get 600v in a 230v supply?. 230v is the rms rating. 325 is the peak and 650 v is the peak to peak. If you have an inductive load you will see a peak voltage of 600 V. That is why semiconductor switching device for mains operation have to be rated at atleast 650V.
If the snubber resistor is open, the triac can misfire due to dV/Dt effects - no gate current but device turns on - depending on phase angle. dV/Dt effects are caused due to internal parasitic RC elements of the thyristor.
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### Author:  [@Farhan](https://metastudio.org/u/Farhan)
#### Post date: [October 17, 2021, 9:23am UTC](https://metastudio.org/t/lets-design-ir-control-board/11425/11 "2021-10-17T09:23:48Z")
> [@Making a reliable ceiling fan regulator](https://metastudio.org/t/making-a-reliable-ceiling-fan-regulator/12755):
>
> Commercial ceiling fan regulators have been extremely unreliable. While the older ones used triacs, the newer ones merely use a combo of capacitors to divide the voltage being supplied to the motor. If the capacitors are not of excellent quality they will fail resulting in poor speed control. This I have observed happening, but never got around to analysing the capacitor failure mode. In the case of triac speed controllers most use a 600v Peak Inverse Voltage (PIV) rated triac. PIV is the volta…