A breadboard setup with various electronic components including a microcontroller, jumper wires, resistors, and an OLED display showing a frequency. The components are mounted on a wooden base with a bright green background.
A close-up view of a red printed circuit board with various electronic components. The board features a rectangular black microchip with multiple pins, several resistors, capacitors, LEDs, and a cylindrical battery holder. A barcode is visible on one of the components, and there are intricate traces and connections soldered onto the board.
Close-up view of a computer circuit board featuring a Wi-Fi module with labels and a QR code. The module is connected to the board with visible soldered connections and surrounding electronic components.