Showing posts from September, 2015

Power switch as current amplifier

This article has tendency to explain why microcontroller (MCU) devices are not good enough to directly drive devices like DC motors or any other high current load.

Below picture shows the electrical concept of the port pin related to the microcontroller device. It is not concrete example of some specific MCU port (but it is much closer to the 8051 pin port configurations), it is an example, which means that each time, we have to take a look into MCU specification to see how ports are organized and configured, before we make a design decision.