Note:* One of my first projects in C language. It started on July 9, 2015.
I assemble it many times at the first mini-constructor of my own design.
The device allows you to control two LED panels using PWM. It is built on the ATMega8A controller. The alphanumeric display is used as an indication of the current brightness level for each of the control channels. The device is controlled using four buttons.
The connection diagram of this controller is shown in the figure below.
Note. When using a load greater than 20 mA, installing the corresponding transistor switches on the controller output is necessary.