Potentiometer keeps burning or sparkles coming out of it when I try to turn it from the lowest to highest vice versa. Please can you tell me what is wrong and how to resolve it.

 

That's not the conventional circuit.
Is the 100W load inductive or just resistive?
What is the triac rating?
Edit: Try increasing the 100R resistor to 10k to fix the problem, if the load is resistive and the triac rating is correct for the circuit.

 

That's not the conventional circuit.
Is the 100W load inductive or just resistive?
What is the triac rating?
Edit: Try increasing the 100R resistor to 10k to fix the problem, if the load is resistive and the triac rating is correct for the circuit.

The triac is bta16 and the load is 100 watt incandescent bulb.

 

The pot goes between the 100Ω resistor and the capacitor.
Buy a new pot first.

 

can you tell me what is wrong and how to resolve it.

You're using the pot in an inappropriate manner and it's working voltage is not likely to be high enough for your application.

Your schematic is not drawn in a style that's easy to read. Stick to monochrome. Using colors reflects poorly on your skills.

 

You may find that your pot is damaged and needs to be replaced.

 

View attachment 273587
You may find that your pot is damaged and needs to be replaced.

Sir, I tried the circuitry above that was posted by you and everything works fine, there's no sparkles coming from the potentiometer. Thank you very much.

 

Stick to monochrome. Using colors reflects poorly on your skills.

How do you mean?

 

How do you mean?

We don't need, or want, color coded schematics. Using colors always seems childish to me.

 

Well um

We don't need, or want, color coded schematics. Using colors always seems childish to me.

Well understood, thank you .

 

We don't need, or want, color coded schematics. Using colors always seems childish to me.

Wish you would tell another member that. He adds red in almost every thing, schematic, he posts.

 

Many of use worked in electronics when the only color in a schematic was blue, so I for one find color in a schematic to be distracting - drawing attention when no special attention is needed. Technologies change, time marches on...

This might be useful to you. Your original circuit did not have a diac in series with the gate. The diac helps the traic switch on cleanly. You can simulate a diac with a pair of inexpensive transistors:

Leave the bases disconnected. The extra resistor and capacitor are there to extend the dimming range.