This blinky project shows how to interface LED to the ESP32 and write a simple program to make the LED blink. The full code is on Github, click here. Parts List ESP-WROOM-32 module USB<->TTL converter (3.3.V) Efficient power supply (3.3V) R1 – resistor 560Ω, see LED Resistor Calculator LED1 – basic LED Circuit Diagram Firmware … 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
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
This is a simple ATtiny13 project that controls LED RGB using Software PWM. In result It gives really nice and colourful light effect. In our circuit a LED cathodes are connected to PB0, PB1 and PB2 while common anode is connected to VCC. The code is on Github, click here. Parts Required ATtiny13 – i.e. … Read more
Yet another quick how-to guide of making a minimalist development board for AVR. The MBAVR-4 development board is designed for megaAVR MCUs like Atmega16 and Atmega32. It is a 4th and last project in series of MBAVR family home-made boards in order to create an nice environment for rapid development. I did these all things … Read more