Arduino – LED linear fade

This article explains how to make an example Arduino project that lights the basic LED (connected in series with resistor to pin 11) using linear fade effect. To build a nice fade effect you need to know how to change the LED brightness, first. The complete code is also on GitHub, here. Linear Fade effect changes the LED brightness … 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 – 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