SDG

[@OrbiterElectronics]

Thanks Steve, interesting project. Looking forward to seeing what you get from that uC if anything. I bought a couple of those trailing edge dimmers for my LEDs to get rid of the buzzing from the standard type, they work a treat 👍 Cheers John

[@sdgelectronics]

The Varilight ones are the most versatile out there, but they need a method to lock out the 'programming' mode as guests always mess them up. The trailing edge dimmers make the isolation transformer buzz quite heavily. I'm probably generating quite a lot of harmonics.

[@ericgee6585]

Very interesting to watch the design process. Thanks for your time.

[@robertcalkjr.8325]

Thanks Steve!

[@sdgelectronics]

Thanks for watching Robert :)

[@electronic7979]

Very good and useful video 👍

[@Mr.Leeroy]

7:26 digital zero and one thresholds are probably in different voltage points. unless you are sampling with very high end ADC, middle point is probably not a zero-crossing.

[@partouelectric2353]

Thanks, Steve great video. Have you tried FL5150 IC from On Semiconductor? It may simplify your circuit and zero crossing issue

[@partouelectric2353]

I am trying to build a board with 12-volts AC input to drive commonly available 12-Volt LED's. Most circuits are designed for 120-volt lights Do you have any suggestions. I found FL5150 IC quite useful for this job but the designs are for 120-volt lights

[@The.Doctor.Venkman]

More questions, Steve: I see you're using a Microchip programmer. What is the model and did you put those nice rubber feet on it yourself? (I've got the Pickit 4) Also, I'm assuming you're using MPLABX or an older version? If so, are you programming in Assembly or C?

[@sdgelectronics]

Hi Andy, it was the RealICE pictured in this video (although upside down). I tend to use that or the ICD3 mainly. Yes, I use MPLABX and in this project I'm using XC16 for development in C. I still use assembly where appropriate.

[@The.Doctor.Venkman]

@@sdgelectronics Cheers, Steve - Good to know and thanks.

[@power-max]

How would this design work with a very nasty input waveform from say a generator?

[@sdgelectronics]

There should be no trouble, the only waveform that potentially could cause trouble would be a modified sine wave inverter, but this would kill any dimmer switch.

[@drakonzebra]

Why are you using 12V to drive the MOSFETs?

[@sdgelectronics]

Vgs on these MOSFETs is only around 20V or so. It could be increased at the risk of transients destroying the gate. Much lower and the dissipation starts to increase.

[@jackbuechler]

What package do you use for your circuit diagrams please?

[@sdgelectronics]

For schematic and layout I use Labcenter Proteus. It's a relatively old version but works well.

[@Mr.Leeroy]

note H11AA1 optocoupler