An educational device and a method of learning to write with the use of this educational device

An educational device consisting of a master device and at least one slave device, each of which has a plastic housing with keys, inside which there is an electrically powered PCB with a microcontroller equipped with software, characterized in that the PCB (19) of each the slave (1) and the master (2) devices have inseparably connected to them and located inside the housing:

• power supply stabilizer (U2), two working sockets (J1, J3) connected with each other by an electric cable, two power sockets connected with each other by an electric cable (J2, J4), socket (J6) for the plug of the cable for programming the microcontroller (U1), socket (J7) for the plug of the cable for diagnosing electronics, socket (J8) for the SD card (22) electrically connected to the loudspeaker (26) connected inseparably with the PCB (19), the socket (J10) with the radio communication module (24), with the antenna (25) embedded in it, and:
• the microcontroller (U1) is electrically connected to the ground (Z) and to the power supply stabilizer (U2), which together with the working socket (J3) and the power socket (J4) are electrically connected to the power source and the ground (Z),
• sockets (J6, J8, J10) are electrically connected to the microcontroller (U1), power supply stabilizer (U2) and ground (Z),
• socket (J7) is electrically connected to the microcontroller (U1) and ground (Z),
• the power socket (J2) is electrically connected to the ground (Z), and together with the working socket (J1) it is electrically connected to the buttons (7) of the keys (3), the keys (3) of the slave (1) being equipped with LEDs (14).