ATtiny13 – PI metal detector

This experimental project shows how to build an AVR microcontroller based simple PI (Pulse Induction) metal detector. My goals were to make a circuit as simple as possible and to use only popular / cheap electronic parts. The device has been tested with very small coil (55mm diameter, about 30 turns of 0.5 DNE) and only 3.0V … Read more

Arduino – blinky with Timer1 COMPA

Next Arduino blinky project. This version of “blinky” example is using Timer1 Compare Match A interrupt to make an onboard LED blink for roughly one second. The code is on Github, click here. Parts Required Arduino board (i.e. UNO) Software This code is written in C++ and can be compiled using an Arduino IDE. All information about how to compile this … Read more

Arduino – blinky with Timer1 OVF

Yet another Arduino blinky project. This version of “blinky” example is using Timer1 Overflow interrupt to make an onboard LED blink for roughly one second. The code is on Github, click here. Parts Required Arduino board (i.e. UNO) Software This code is written in C++ and can be compiled using an Arduino IDE. All information about how to compile this project is here. /** * … Read more

ATtiny13 – blinky with timer COMPA (assembler version)

In this example I’would like to show you how to write in assembler “blinky” project that uses timer COMPA (Timer/Counter Compare Match A) interrupt. The previous blinky project is very similar to what is presented here, but with one exception – the delay section has been replaced by timer interrupt.  In our circuit LED is connected to PB0 and is blinking … Read more

ATtiny13 – blinky with delay function (assembler version)

This tiny project shows how to interface LED to the microcontroller ATtiny13 and write a simple program in anssembler to make it blink. The code is on Github, click here. LEDs are widely used for various display functions and can be directly (not quite directly, through the resistor) driven from the pins of AVR chip. In our … Read more

ATtiny13 – TM1638 Library

This is tinyAVR (ATtiny13, ATtiny25, ATtiny45, ATtiny85, and other) library for LED controller modules based on TM1638 chip. Modules based on TM1638 provide three signal connections (CLK, STB and DIO) and two power connections (VCC and GND). Signal pins can be connected to any pair of digital pins of the AVR chip. Signal pins configuration is … Read more

ATtiny13 – TM1637 Library

This article is about tinyAVR (ATtiny13, ATtiny25, ATtiny45, ATtiny85) library for 7-segment display modules based on TM1637 chip. These TM1637 modules provide two signal connections (CLK and DIO) and two power connections (VCC and GND). Signal pins can be connected to any pair of digital pins of the AVR chip. Signal pins configuration is defined … Read more

ATtiny13 – pseudo random numbers

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

ATtiny13 – Morse Code (flashing light)

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