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Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Fri, 22 Jul 2022 07:58:05 GMT

I am Chintan Gopani. We have designed the Dimmer circuit using Triac BT136 and MOC3021 and Zero crossing detection circuit and other peripheral devices. Our application is to dim the standard dimmable LED lights fixtures in the USA.

Our application is based on the USA market. I attached the design file for the review.

I request you that please schedule the call with a technical person for the design improvement.

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

michaelkellett — Tue, 26 Jul 2022 08:41:23 GMT

Without scope traces of waveforms it is not possible to make any useful comment.

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Tue, 26 Jul 2022 06:46:51 GMT

But it is flicker while we used LED bulb and it is flickering while brightness has been increased above 70%

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 11:07:30 GMT

It is working fine with Incandescent light bulb without any flcikring. we are dimming the bulb by PWM signal with 50Hz frequency i.e. waveform has T=20ms. And based on that we are changing the duty cycle as per zero-crossing detection

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 11:04:14 GMT

Yes, This is commercial project

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

michaelkellett — Mon, 25 Jul 2022 10:37:48 GMT

This isn't quite what I had in mind.

Do you have an ocilloscope ?

You will need to take precautions re. isolation of mains AC voltages to do any measuring here.

If you do not understand why this is necessary or do not know how to safely measure mains powered equipment then you will need to find someone to do the work for you.

It will not be possible to debug this design without checking waveforms with a scope.

Is this a commercial project (ie are you designing something which you wish to amkes and sell) ?

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 10:32:20 GMT

Here input Supply voltage is 230V AC, 50Hz

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 09:45:15 GMT

PFA the testing results

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 09:44:55 GMT

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

michaelkellett — Mon, 25 Jul 2022 09:04:58 GMT

OK, so show us pictures and test results - no one can help you without enough information to undertsnad your proble,.

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 08:47:10 GMT

We have not done the simulation we have making the our circuit on General Purpose Board (GPB) and done the testing with LED light

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

michaelkellett — Mon, 25 Jul 2022 08:13:39 GMT

If you were to show us your simulation data it might be possible to help. What simulation tool did you use ?

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Mon, 25 Jul 2022 06:11:25 GMT

Yes i tried, but it is flickering during the dimming LED light while i used LED light. So, please give me the appropriate solution for the same.

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

michaelkellett — Fri, 22 Jul 2022 08:58:47 GMT

Have you tried simulating this design ?

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Fri, 22 Jul 2022 07:59:07 GMT

PFA circuit design file

RE: Verify the enclosed LED dimmer circuit using Triac BT136 and MOC3021 circuit

chintan — Fri, 22 Jul 2022 07:58:46 GMT

community.element14.com/.../MeshTek-1CH-AC-Triac-Dimers_5F00_V1_2D00_0.pdf

VCNL4040 vs VCNL4020

zafersen — Thu, 14 Jul 2022 10:41:21 GMT

Hi,

I was looking for a whitepaper about a detailed comparison of Vishay's vcnl4040 and vcnl4020 sensors such as a comparison of power consumption for each feature, and key differences between these two sensors. I did it by reading their datasheet myself but you know to confirm I just wanted to see whether there is anything to compare.

Vishay's engineer team may have something about this issue.

Thank you!