ATtiny13 – disco lights using DFT

This is my another “disco lights” project which is an upgraded version of ATtiny13 – dance lights with DFT. This time I used a full implementation of optimized DFT algorithm with reduced memory access to compute a power spectrum of audio signal. This version has also 3-channel lights but visual effects are much-much better! Required Parts ATtiny13  – i.e. MBAVR-1 (Minimalist Development … Read more

ATtiny13 – PI metal detector

This experimental project shows how to build a simple PI (Pulse Induction) metal detector based on ATtiny13 / AVR microcontroller. 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 … Read more

ATtiny13 – 8bit mono class D amplifier

I always wonder whether it is possible to make an amplifier of class D on ATtiny13 or not. Some time ago I found George Gardner’s project based on ATtiny85 – TinyD. It was a sign to start challenging it with ATtiny13. It took me a few hours but finally I made it! The code is very short and useses a … Read more

ATtiny13 – clap clap switch

This project shows how turn ATtiny13 with sound detector module into smart Clap Clap Switch. The project has been designed to react on only double claps (clap clap – ON, clap clap – OFF). So, how it works? There is one pin for a MIC (digital output from sound detector module) and one pin for a … Read more

ATtiny13 – controlling stepper motor 28BYJ-48

This simple project shows how to control popular and cheap stepper motor 28BYJ-48 using ATtiny13. The code is on Github, click here. Parts Required ATtiny13  – i.e. MBAVR-1 development board stepper motor 28BYJ-48 with driver on ULN2003 Circuit Diagram Software This code is written in C and can be compiled using the avr-gcc. All information about how to compile this project is here. /** * … Read more

ATtiny13 – randomly flashing LED with PRNG based on BBS

This project is very similar to ATtiny13 – randomly flashing LED with PRNG based on LFSR. However, this time I used BBS (Blum-Blum-Shumb) algorithm as PRNG (Pseudo Random Number Generator) to generate 16-bit (pseudo) random numbers. The less significant bit of randomly generated number is a major factor in decision to on/off the LED. The code is on Github, click here Parts Required … Read more

ATtiny13 – hardware PWM

This article shows how to make an ATtiny13 to generate hardware PWM (Pulse Width Modulation) signal. The example code uses timer in Fast PWM mode (WGM02:0 = 3, see manual section 11.7.3). In this mode, by setting the COM0A1:0 bits to one, the compare unit allows generation of PWM waveforms on the AC0A pin (PB0) with duty resolution 0..255. The presented example … Read more

A few funny projects using my simplified implementation of DFT

Bilexa Bass – Singing Fish, Sound-Actived 3D-printed Vibrator and Scared Spider Toy. I wanted to highlight these funny (sometimes crazy!) projects as they are using my version of simplified implementation of DFT I created for project ATtiny13 – dance lights with DFT and because the authors are very idea-driven, original and just awsome. Bilexa Bass – Singing Fish (Bob, ATtiny84) … Read more

ATtiny13 – controlling LEDs WS2811/WS2812

There was a time when controlling RGB LEDs was not always an easy task. I this article I would like to show how to make it without difficulty using one ATtiny13 and LEDs based on WS2811/WS2811 driver. The addressable LEDs are using protocol similiar to OneWire (very time-depended protocol) and can be connected together to create a strip … Read more