Op-amps are very useful devices in electronics and can be very helpful when interfacing analog and digital technologies in embedded systems.
October 2013 Archive
Controlling a Solenoid
Many products use solenoids to open and close valves. A microcontroller can control solenoids programmatically using a GPIO pin and a simple circuit.
Using Pull-Up and Pull-Down Resistors
An embedded microcontroller utilizes input/output (IO) signals to communicate with the outside world. The simplest form of IO is commonly referred to as general purpose input/output (GPIO) where the GPIO voltage level can be high, low, or high-impedance. Pulling resistors are used to ensure GPIO is always in a valid state.
Using LEDs in Embedded Designs
LEDs are a common element of many embedded designs. Though the devices are simple; their implementation is not always simplistic. Optimizing LED cost and performance includes ensuring the driving circuitry is providing the correct voltage and current.
Using Doxygen with C
Doxygen is a free source code documentation tool. It automatically decomposes a software design when using an object-oriented programming language such as C++ or Java. When using C, however, there is no natural break-down of the code so the developer must create groups (or modules) within Doxygen to show a definitive decomposition of the design.