Dimmer RC - 127V - 60Hz

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Alexandre
Posts: 6
Joined: 28 Sep 2018, 13:44

Dimmer RC - 127V - 60Hz

Post by Alexandre »

Hi,
Where I live the mains are 127V AC (Line to Neutral) and 60Hz.
I have checked the Application notes for the Dimmer RC module, and from my understanding, to make it work properly, I will need to change the Firmware (all the timing parameters are based on 50Hz mains). From the HW perspective, If I do not change anything, the only drawback will be the current limitation by the fuses (I will have less than the specified 250W load dimming capacity).
Are my assumptions correct, or do I need further SW / HW changes?
Thank you.
Jacek
Posts: 559
Joined: 17 Feb 2007, 18:00

Re: Dimmer RC - 127V - 60Hz

Post by Jacek »

Hi,
In hardware:
1. You need 12V at D5 diode which means you would have to use R11, R12 resistors with lower resistance around 26kOhm.
2. The zero-detection circuit with R9, R10 should be around 38kOhm
3. With fuse 1.25A the max load power would be around 130W for resistive loads.
The rest components should be ok, but please be careful when testing.
In software:
Your mains half period is 8333us. The are a few places where you have to change code.
1. https://github.com/hapcan/UNIV_3.6.0.x/ ... 1.asm#L222
2. https://github.com/hapcan/UNIV_3.6.0.x/ ... 1.asm#L236
3. https://github.com/hapcan/UNIV_3.6.0.x/ ... 1.asm#L795
4. https://github.com/hapcan/UNIV_3.6.0.x/ ... .asm#L1184
I just quickly scanned the source code, but might missed something.
Regards
Jacek
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