Description: The pad is enlarged and sprayed with tin, it is easy to solder, and the solder pad is not easy to fall off many times. It is not easy to bend and bend (refers to the bending caused by non-human conditions), and the poor plate will follow Bending due to changes in time and environment. The impedance is more stable and reliable; the pin header port is an external code port (can be directly connected to the I/O port of the MCU). Toggle switches are manual code switches. Working voltage: 4.5 to 5V PCB Size: approx. 48 x 41mm Control mode: manual coding + external coding Package Includes: 1 Piece PCB board 4 Pieces 12D07 toggle switch 1 Piece 9561 Music IC 1 Piece Passive buzzer 2 Pieces 14P IC Block 1 Piece CD4011 1 Piece CD4066 1 Piece 5P pin header 1 Piece 8050 Transistor 1 Piece 104 ceramic capacitor 2 Pieces 1N4148 diode 1 Piece 1N4007 diode 6 Pieces 150K resistor 2 Pieces 270K resistor 1 Piece 62K resistor 1 Piece 620K resistor
