(EN) DIY Guitar Stompbox - The A-1 Buffer

This is my new stomp box: the A-1 Buffer pedal. It is very simple, very small, transparent and beautiful (IMHO).

It is based on on an N-type JFET and its circuit has very few components, making it a good first project

(EN) MCP23017 I/O port expander - How to use it with Arduino

The MCP23017 chip is I/O port expander that uses the I2C communication protocol. You can connect it to your Arduino using only two pins (those needed for I2C communication) and get 16 more digital I/O ports in return.

Furthermore you can chain up to eight expander in series and get 128 digital ports, always at the small cost of two pins.

This is a simple circuit to explain you how to connect and use the MCP23017: connect a momentary button

Wellcome

WELLCOME	BENVENUTO
Hi and wellcome to my Stories. I am Muldee and in theese pages I will show you a glimps of my multiverse. Music, Making, DIY. The blog is bi-lingual, Italian and English. Enjoy.	Ciao e benvenuto alle mie Stories. Io sono Muldee e in queste pagine ti mostrerò un assaggio del mio multiverso. Musica, creazione, fai-da-te. Il blog è bilingue, italiano e inglese. Divertiti.