Op-amps are very useful devices in electronics and can be very helpful when interfacing analog and digital technologies in embedded systems.
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.
Sensing the Source Current in an Embedded Application
This is a simple, low-cost way to measure the current output at the power source of an embedded system using a microcontroller’s ADC input.
Get the CoAction Hero with Stratify OS pre-installed
The CoAction Hero is an ARM Cortex M3 development board. It has Stratify OS pre-installed which gives you easy-to-use multi-threading, hardware abstraction and debugging all by simply connecting a USB cable.
Motor Control using PWM and PID
Bi-directional motor control can be done using an H-bridge circuit with pulse-width modulation (PWM) from a microcontroller to vary the speed. Several design challenges include preventing shoot-through, implementing a snubber circuit, as well as open and closed loop (such as PID) control mechanisms.