The dimming effect is achieved using PWM provided by an Arduino UNO board. The DIM pin can be driven by an external DC voltage between 0.5V and 2.5V. If the voltage is higher than 2.5V the output ...

In this design, only one push button switch is used to control the light output (from a bunch of white LEDs) between off, dim, medium, and full brightness. Further, if you hold down the push button ...

An Arduino drives the switch-mode power supply, offering dimming thanks to PWM, and the ability to automatically switch the light on and off using an RTC chip with a battery backup.