Tessel-Clap-Switch

Tessel listens for a clap, then toggles a relay to turn something on and off.

(Also view this project/get the code easily at the Tessel projects page)

You need:

• Tessel
• Ambient Module
• Relay Module
• Lights and plug (or similar)

To use:

1. Clone this repo
2. npm install
3. Connect lights to Relay Module in Relay port 1
4. Plug in modules to Tessel: Relay in port A; Ambient in port B
5. Plug in tessel via USB
6. Plug in power to lights/relay
7. Run "tessel run index.js" from this folder in your terminal
8. Clap! Watch the lights turn on and off.

See it work:

On vine

A relay acts as a switch– either connecting ('on') or not connecting ('off') the two wires fed into the channel.

Use a pen or a nail to press down on the top of the relay, and feed in the red (power) wire.

The ground wire doesn't go into the relay; it just goes straight to the power adapter.

Relay gets plugged into Port A; Ambient gets plugged into Port B.

Plug in the Tessel to your computer. This provides power and lets you push code.

You can download my code from https://github.com/Frijol/Tessel-Clap-Switch. It looks like this:

// Takes a triggering value for ambient sound,
// toggles relay 1 when that trigger is hit.
var tessel = require('tessel');
var relay = require('relay-mono').use(tessel.port['A']);
var ambient = require('ambient-attx4').use(tessel.port['B']);
// Sound level (0-1) needed to trigger. You may need to adjust this.
var triggerVal = 0.22;
// When the module is connected
ambient.on('ready', function () {
  // Set the sound trigger
  ambient.setSoundTrigger(triggerVal);
  // When the sound trigger is reached
  ambient.on('sound-trigger', function triggerHit() {
    // Toggle the switch
    relay.toggle(1);
  });
});

1. Clone the repo to get the code on your computer.
2. From inside the directory, `npm install` in the command line to install the ambient and relay module libraries.
3. If you don't have tessel installed already, `npm install tessel -g` so you have the Tessel command line tool.
4. `tessel run index.js` to run the code on your Tessel.
5. Clap! Watch the lights turn on and off.

Demo:

If you want to use it separately from your computer, you can run `tessel push index.js` and it will save the code in memory.

You can then disconnect Tessel from your computer, and power Tessel using any of the methods listed here. I plug it into the wall using my Android charger.

As soon as you provide power, Tessel will automatically run your code.

There are a lot of other things I could (trivially) do with this setup but haven't gotten around to:

• Hook it up to a web interface so I can turn the lights on and off from anywhere with internet
• Read ambient light data and automatically turn the lights on and off if it's dark/bright in the room