This is an automatic
light dimmer circuit. You do not need to dim the lights by yourself. It is so very convenient, because we use the LDR to detect external light. To control the Triac, and the brightness of the lamp next.
Suppose low light so there is
voltage across the LDR many making the triac a lot of work, the lamp so super bright. But some time the light is very high so a few voltage at Triac , then the lamp do not work or low bright.
Very cheap ac light dimmer You may had saw to a complicated AC light dimmer circuit ago. Now let’s look simple, but useful, fairly good.This circuit uses a capacitor in series with one lamp and accessories with a bit more. Is used to control the light dimmer, Easy and cheap.
Dimmer light touch system Working dimmer light bulbs Mechanic will cause a deterioration easy.And when using open or close the switch will cause a spark.But this cycle can be opened, adjusted and closed with a single point of contact.The IC number PT2102 make this circuit work 4-step is close