HX711 load cell amplifier library for AVR ATmega

A HX711 load cell library for AVR ATmega: HX711 is a precision 24bit ADC IC designed for weigh scales and industrial control applications to interface directly with a bridge sensor. A load cell is a transducer that is used to create an electrical signal whose magnitude is directly proportional to the force being measured. The […]

SerialDebug Library for Arduino

Rui Santos over at Random Nerd Tutorials wrote a series of three posts on how to use the SerialDebug library created by João Lopes with Arduino IDE (programming Arduino, ESP32, ESP8266): After programming the ESP32 using ESP-IDF, João noticed that debug for Arduino IDE needed some improvement. So, he created the SerialDebug library to bring […]

An AVR Atmega library for multiple HD44780 based LCD connected through i2c

Davide Gironi has posted an I2C multiple HD44780 AVR Atmega library: This library implements a driver for HD44780 lcd connected through PCF8574 port expander. Data is transmitted using only 2 wire over i2c with the PCF8574. This library can drive up to 8 LCD concurrently. Lcd driver is based upon Peter Fleury’s lcd driver HD44780 […]

ESP8266: SSD1306 OLED library release

Daniel Eichhorn writes: The “ESP8266 OLED SSD1306″ is an open source library which allows you to control those pretty OLED modules from our beloved ESP8266 module. Fabrice Weinberg cleaned up all the ugly pieces of code which I initially wrote caused by my near C/C++ illiteracy. He also added support for Pasko’s BRZO I2C library […]

Atmega16u2 virtual serial example using LUFA Library

Shane of Wattnotions has published a new build, an Atmega16u2 virtual serial LUFA board: What I wanted the LUFA library to do was pretty specific – the atmega16u2 should show up as a virtual serial port so that the computer can connect and read data from it like any other serial port. All of the other […]

ZFM-20 fingerprint capture library

Dilshan Jayakody  writes: This ZFM-20 fingerprint library is developed to capture and retrieve fingerprint images from the above sensor module. The main purpose of this library is to use ZFM-20 sensor with PC as low cost fingerprint capture unit and because of that, in-module fingerprint processing and verification functions are not implemented in this library. […]

RFM69_ATC: Automatic Transmission Control

Felix of LowPowerLab writes: There is now a new extension to the RFM69 library. It’s called RFM69_ATC aka Automatic Transmission Control. Many thanks to Tom Studwell who implemented this and shared it in the forum. The basic idea behind this extension is to allow your nodes to dial down transmission power based on the received […]

XORLib, an open source game library for PIC32s

Shaos shared his game library for PIC32s in the project log forum: XORLib is a simple multiplatform game library that is licensed under MIT-license and developed at least for two platforms: PIC32 with NTSC and PAL TV DOS with CGA/EGA/VGA PIC32 code based on “NTSC TV interface” examples from hackaday.io/project/2032-pic32-oscilloscope by Bruce Land (Cornell University) that […]

Drive a stepper motor with acceleration and deceleration using an Allegro driver on ATmega8

Davide Gironi writes: This library drive a stepper motor using the Allegro A3967 (EasyDriver) on ATmega8. It will also work on the Allegro a4988, and other type of motor driver controlled by the number of pulse received. It features: direction changing speed changing acceleration and deceleration multiple motor driving stop spinning after number of step, […]

A Xively logger library for Spark Core

Davide Gironi writes: Xively (formerly Cosm and before that Pachube) is an on-line database service allowing developers to connect sensor-derived data (e.g. energy and environment data from objects, devices & buildings) to the Web and to build their own applications based on that data. This library is a modular and configurable Xively data logger, built […]

Arduino Library for Freescale’s MMA7361 3 axis accelerometer

Rohit Gupta wrote a basic library for using MMA7361 3axis Accelerometer with Arduino, that is available at Github: This library helps you to easily play with the almost universal 3 axis accelerometer available in most Hobby markets that is based on Freescale’s MMA7361. In order to get in working you have to pull-up the sleep […]

ArTICL: Arduino TI Calculator Linking Library

KermMartian over at Cemetech writes: The ArTICL library (pronounced “article”) lets Arduino programs send and receive TI link protocol-formatted packets at a low level. In addition, it includes a CBL2 class that lets the calculator emulate either a CBL2 device or a calculator speaking the CBL2 protocol (thanks to Cemetech member CVSoft for helping to make […]

Measure audio level using root mean square on Spark Core

Davide Gironi writes: A Spark.io library to retrive RMS and Spl value from an audio input. This library reads data from an ADC pin and returns the RMS value of the input simply using RMS avarage. The root mean square (abbreviated RMS or rms), also known as the quadratic mean, is a statistical measure of […]