This is a small but powerful C++ library (AVR GCC) which gives you some standard features like GPIO/UART/SPI/TWI. You can use it in your AVR-based projects. Library is focused on a good GPIO management and external driver integration on various Atmel microcontrollers. What makes it a perfect tool for rapid prototyping. Library is extremely easy … Read more
Many applications require random data to feed their algorithms. One would say that it’s quite easy when we can use a function from an existing cryptographic library. However, even if we can use such function like for example rand() from stdlib, it can quickly turn out, that this feature consume more then a half of … Read more
This project shows how to form a light impulses using an ATtiny13 to transmit messages encoded with International Morse Code. Project is easy to build and require only three parts. The code is on Github, click here. Morse Code allow to transmit data via short (dots) and long (dashes) impulsions. The advantage of the Morse … Read more
This is a simple and easy to build two-tone alarm that uses ATtiny13 to produce sound effects. Note that with little modifications the project can be easily utilized for many applications, in circuits where a double tone alarm may be required. Project’s code has been designed to make possible extend a list of two-tone sound … Read more
I decided to check offerings and product quality of OSH Park, a PCB manufacturer from the US. I’ve ordered three PCBs of MBAVR-4 (order costs – 10$, shipping costs – 14$). I had to wait 4 weeks for UPS as it had to be delivered to Poland, where I live, but it was worth the … Read more
This experimental project shows how to use ATtiny13 to synchronize live music and lights with only a few additional components required. Project uses single ADC (Analog to Digital Converter) channel for signal acquisition and some DSP (Digital Signal Processing) calculations that in real-time separate three frequency bands and make the LEDs dance in sync with the … Read more
There is a set of projects that require some kind of audio output. For example a simple alarm bell. This project shows how we can produce different kinds of audio effects by just using an AVR MCU and a speaker/buzzer. We will use 8-bit Timer, PWM technique and some pre-calculations to generate right sounds. Tu … Read more
In this example we will make a project that uses standard IR remote control from your TV, audio system or other using NEC signal format, to receive and recognize address/command with AVR ATtiny13. Thanks to Software UART we will print received NEC address/command via serial console. Project has been tested with ATtiny13a @9.6 MHz, VCC=5V … Read more
This project allows control turn ON/OFF LEDs with IR remote control from your TV. The big part of the code shows how to decode a command and address of NEC protocol from IR signals using a cheap IR receiver. It’s worth to note that the algorithm which is responsible for decoding IR signals is nonblocking … Read more
Sometimes it makes the most sense to design systems from the ground up, and other times when simplicity or a quick project completion is desired, pre-built system boards are a better choice. These four MBAVR development boards has been designed in order to create a minimalist and very useful environment to support a rapid development … Read more