A 555 player PIANO
From simple buzzers to an Atari Punk Console, the simple 555 timer chip is the foundation of a whole great deal of fascinating lo-fi synth projects perfect for beginners. [Steven] put together a fantastic tutorial for utilizing the 555 timer in a rudimentary synth, as well as even went so far as to develop a simple electronic player piano able to play a tune from a sheet of paper with punched holes.
The fundamental 555 oscillator circuit is extremely simple – just a few caps as well as resistors as well as powered by a few batteries. [Steven] built the easiest 555 circuit, however utilized a line of graphite drawn on a piece of paper for the resistor controlling the frequency. It’s basically a drawdio built on a breadboard, as well as simple sufficient to develop for even the most neophyte electronic tinkerer.
Going one step further, [Stephen] drew a long thick line of pencil graphite on a piece of paper as well as mounted eleven cable loops connected to the circuit over his improvised resistor. After cutting a few holes in a piece of paper, he was able to produce a simple player piano with his 555 synth. It worked well sufficient to play Greensleeves, as well as is the perfect job for the budding electronics hacker.