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Indicator Panel with Infrared Receiver

Description

A Ø 70mm circular-shaped daughter PCBA for product status indication and receiving IR signal from remote control. Indicators are driven by NPN transistors. MCU roles includes controlling indication LEDs, driving piezoelectric buzzer with 4kHz PWM, decoding NEC IR signals, and USART communication with main controller.

Connection to the main controller was done similar to 24V/17W LED Driver.

Block Diagram


🔴ST STM32L011F4 32MHz Ultra-low-power ARM Cortex-M0+ MCU
🟠Vishay TSOP4438 IR Receiver Module with AGC
🟡Mill-max 0908-9 .430” spring loaded contacts

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