The MAXQ3212 microcontroller is ideally suited for real-world control applications because of its small size, low cost, and ready availability of a complete, low-cost development system. This application note describes a system based on the MAXQ3212 that is designed to sequence AC power to a set of stereo components. The system eliminates objectionable and potentially damaging transients during system power-up or power-down. The MAXQ3212 RISC microcontroller uses port pins as I/Os, and generates signals to activate relays to switch the AC power to two separate groups of stereo components.