How to Make a Dimmer Switch

About: I make diy and electronics based projects.

In this instructables I will show you how to make a dimmer switch

Step 1: Components Needed

1)bt136 triac

2)2× 220k/400v capacitor

3)224j/400v capacitor

4)33ohm resistor

5)2× 68k resistor

6)8k2 resistor


8)100k volume control

9) dot board

Step 2: Circuit Diagram

Step 3: Final Procedure

Now we need a project enclosure I make a hole for volume control and a hole for cord wire finally need a 3pin plug and close your box make sure there is no short circuit in the box insulate all wire.

Step 4: Final Result

Now our project is complete you can control brightness of incandescent lamps and speed control of ac motor finally the temperature of soldering iron.

Step 5: More Details in This Video



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    5 months ago

    I am interested . Can you explain the principles behind your design . What it does on each cycle is there any heat produced in the components?