Articles and news - Microcontrollers - 5

When you are working with battery depending low power-consuming circuits, then you may need this innovative power switch. The concept is to save energy while the device is not operating but the battery is connected...

It is sometimes necessary for a microcontroller to generate a pulse whose voltage is higher than the power-supply voltage of the microcontroller...

Piezoelectric buzzers find wide use as audible-signal generators because of their low power consumption and clear, penetrating sound. An external driver or a self-driven circuit that oscillates at the resonant frequency of the piezoelectric element can drive these buzzers...

Targeted for the smart home, this design leverages two PIC MCUs that use a wireless RF transmitter/receiver to control up to six relays and monitor two analog signals...

This 8051 microcontroller-based control circuit adjusts the speed of a small permanent-magnet dc motor via photosensors...

This article describes a portable breadboard-friendly adjustable power supply, designed as an ideal supply for Arduino projects and other low-power circuits. It is capable of providing from 0 V to 5.5 V at up to 0.5 A, and is powered by two rechargable Li-ion cells...

A recent Design Idea prompted me to offer the simpler solution that I used in a recent project. We needed a momentary power switch with processor supervision...

In this project, we will be using the ESP8266-01 Wi-Fi Development board to make a small IoT home automation that has Wi-Fi featured in it. The system operates on a local web server and is easy to use for the novice...

Laboratory data often appears as Gaussian curves, and today's laboratory data-acquisition software is designed to analyze these data to determine such things as peak location, amplitude, area, and width. A good test signal is useful in developing such software...

The most common method for interfacing multiple switches – multiplexing – allows for the connection of (N/2)2 switches with N microcontroller I/O lines. The method described below, which has its roots in an LED interface technique commonly known as “Charlieplexing,” makes it possible to interface...