Relays are fundamental components in electrical and electronic systems, functioning as switches to control circuits. By utilizing an electromagnet or solid-state mechanism, relays enable seamless switching of high-power loads using low-power control signals. Their versatility and reliability make them indispensable in industries like automation, automotive, and home appliances.

If it wasn’t already blatantly obvious, electronics are everything － especially in this day and age. From the smartphones in our pockets to the machinery that keeps our factories running to the medical tech that helps us live longer, healthier, and happier lives, there’s an awful lot responsible for keeping our modern world turning. However, all those gadgets and gizmos (unfortunately) don’t just run off magic. Their operation instead requires good old-fashioned energy. And something crucial to that process? The bridge rectifier.

In this article, the most significant microcontroller interfaces, UART, SPI, I2C, ADC, DAC, PWM, USB, Ethernet, SD card, and CAN are briefly discussed.