This idea come from my sleeping habit. Sometimes I cannot sleep without lamp so I decide to make mood lamp with timer. There are components, two bulbs, socket, AC relay board which changed direction of electricity between two bulbs, AC dimmer board.
I made a AC relay board for mid-term so this time I will make AC dimmer board.
Final output is sand clock shaped lamp. why sand clock shaped? This is because sand clock can represent the amount of time, such as 10min or 30min.