From a25eca40279136ce6c9caf14616d4821e498861b Mon Sep 17 00:00:00 2001 From: KatJoyWhite Date: Sun, 9 Dec 2012 11:41:58 +0000 Subject: [PATCH] Update README.md --- README.md | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 9e26927..ad6c249 100644 --- a/README.md +++ b/README.md @@ -18,7 +18,7 @@ Learn how to build circuits with sensors and outputs and write a simple programm * 2 x Arduino Uno boards (with USB cables) * 1 x strip potentiometer * 2 x tilt sensors -* 4 x piezo buzzers +* 4 x piezo buzzers (the type in greetings cards, easy to get from Maplin) * 10K resistors * Bread boards (1 per instrument) * Card @@ -33,3 +33,25 @@ Learn how to build circuits with sensors and outputs and write a simple programm ## Drum Kit +### 1. Make your drums + +Take your 4 piezo buzzers and attach a ring of Sugru (or other modelling material) as shown in the picture. +This will increase the flexibility and resonance of the sensors. Let the sugru set. + + +### 2. Make the circuit + +Piezo buzzers generate a small charges when you tap them, so they don’t need a power source. +Connect one lead from your buzzer to one of your analogue inputs, and connect the other lead to ground. +Repeat for each of your drums. + + + +## Pull-down Resistors + +You’ll find your analogue inputs receive signal when you don’t expect them to. +This is because there’s electricty floating around in the system, or something like that. + +To fix this, you need to wire each input to ground, through a 10KΩ resistor. + +A better explanation can be found [here](http://arduino.cc/en/Tutorial/DigitalPins). -- 2.34.1