Remote control coded infrared transmitter circuit

Shown is the remote control coded infrared transmitter circuit. The circuit is composed of three parts: infrared remote control keyboard matrix circuit, M50110p infrared remote
control transmitter integrated circuit and amplification drive circuit.
    Its core circuit is the IC01 M 50110 P infrared remote control transmitter integrated circuit. Its ④~⑩ pins are externally connected to the keyboard matrix circuit, that is, the manual command
input circuit. After operating the keys. The ICOI@ pin outputs the remote control command signal, which is amplified by Qoi and Q02 to drive the infrared light-emitting diode Dot~
D∞ to emit the infrared light remote control signal.
    K01 is the buzzer and Q∞ and Q¨ are the buzzer driving transistors. When the signal is transmitted, the buzzer will sound to indicate that the signal has been transmitted
.