It is a question of funds and access.Theres no factory made light dimmers for sale in Nepal?
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It is a question of funds and access.Theres no factory made light dimmers for sale in Nepal?
I saw 'NTC' in a thermistor (used in series of mains of a computer SMPS)
100 meter far, my neighbour have a big 3 phase motor. When they turn ON and OFF, I can feel the effect in my home in mains. Do they generate spikes and can affect to my triac of my home?
Hi tchtech,So why not just buy a heavy duty rated dimmer and be done with it? Why reinvent the wheel and do it poorly?
If the devices is not related to VERY common 'consumer' electronics then the device is not accessible for me. Once I had seen a factory made small fan controller (dimmer) and that had BT134, DB3, some resistor and some capacitor and a pot; almost same as my circuit of #1.Theres no factory made light dimmers for sale in Nepal?
No 'justification' is required. The OP wishes to build his own circuit. On the basis of your logic most of the projects on ETO would be 'non-justified'.I see. That doesn't justify much given the cost of the correct parts to build his own will be more than buying a properly made one.
So unless he already has a good triac with a 6 - 10+ amp 600+ volt rating laying around plus all the other parts needed to make a stable firing circuit there's nothing financially to gain from the DIY approach as it has already shown.
Wow, that is the best dimmer circuit of that type I have seen- full belt and braces military design.OK, now I made a conclusion circuit from the suggestion of yours. Learned some critical points of triac too. Any comments still?
One question: look at the R1, it's connected to the right side of the load here. I found in some circuit, R1 is connected to the left side (mains) of the load directly. What would be the difference?
Interesting question. If R1 were connected to the left side of the load, the DIAC trigger phase angle may be a touch erratic, because after the DIAC fires, the capacitor will start charging again and will have some voltage across it when the mains changes from one polarity to another.One question: look at the R1, it's connected to the right side of the load here. I found in some circuit, R1 is connected to the left side (mains) of the load directly. What would be the difference?
OK, now I made a conclusion circuit from the suggestion of yours. Learned some critical points of triac too. Any comments still?
One question: look at the R1, it's connected to the right side of the load here. I found in some circuit, R1 is connected to the left side (mains) of the load directly. What would be the difference?
Light was not totally dark with sensitive gate 2N6073 but I got totally dark with BT136. However PWM driver seems safe and good controller as your saying.That brings us to the question, why are you not using a more modern circuit?
Maybe I can use a 555 chip to generate PWM and can drive the triac. The controller would need little more parts. And I think I need to protect the gate because it's connected to critical PWM chip. Maybe need an isolator.