Laptop Gloves

Problem 

Delhi is freezing these days with major swings in the temperature and I caught a major cold. Now since I am feeling cold more than usual, my mother has ensured I am covered in three layers of clothing. Besides I am expected to wear a muffler, ear pads, gloves and socks.

Thats me!

selfie

Now the problem is I can’t use the trackpad of my laptop with the gloves on. And I dont feel comfortable if I dont wear gloves. [Yes I am complaining more than required, I know]

Solution

I didnt have conductive threads and I am not in a state to go to market or anything, so I had to make do with the most malleable conductor I had at home – Aluminum Foil!

So the idea is to line the inner layer of your index finger with aluminium, connect a wire to it and pull that outside through the glove and connect it to another strip of aluminum wire and wrap that around the outer surface of the index finger.

 

Step 1

 
1

 

Step 2

 
2

 

Step 3

 
3

 

Step 4

 
4

 

Step 5

 
5

 

Demo

 

TADA!

Now I can be sick and yet productive! :P

Arduino Noise [Four Step Sequencer]

4bitsynth

This is a demo video for an intermediate stage of a 4 step sequencer that I have built using an Arduino Uno and the Mozzi library.

The synth right now also has an LFO and Reverb mode but has not been demo-ed in the video.

It is very easy to build once you know the concepts of sound synthesis. All you need is an arduino, some knobs, a baterry and a Soap Box to put them all in :)

Source Code needs some cleaning up and will be put up soon :)

Add some LEDs and LDRs to it and you have a blingy noise box!

Wireframing tool for ubuntu

Having tried a number of wireframing tools online that were either too unusable or buggy or not free, I came across a desktop application for Linux called The Pencil Project.
Hassle free installation, i was making wireframes within seconds. Highly recommended.

Trial Export

 

MockupUI2

 

Please note that the knob icon does not come built with the software. I made one for audio plugin UI.

using LDT0-028K with an arduino as an impact sensor

For a project that I am working on I had to use a piezo sensor to detect impact of falling water on a surface. I bought the LDT0-028K from protocentral (excellent service, btw).

I had initial hiccups in getting started and had to read through the techincal manual to get started. I could not find much on googling, So I thought I’d put it here for someone who uses the right words on google search.

You need to connect the piezo in parrallel with a 1M ohm resistor. Well thats all!

This is what I could get : On setting threshold of 60, I could detect impact of a stream of water falling on a box. Upon breaking the fall of the water by putting your hand midway, the sensor would switch off.

Here is my setup (sorry for the bad pictures)

2013-10-19 12.49.43 2013-10-19 12.49.50 2013-10-19 12.49.57 2013-10-19 12.50.04

 

schematic1

Arduino Code :

int sensorPin = A0;
int ledPin = 13;
int sensorValue = 0;

void setup() {
pinMode(ledPin, OUTPUT);
}

void loop() {
sensorValue = analogRead(sensorPin);
if (sensorValue >70){
digitalWrite(ledPin, HIGH);
}

else{
digitalWrite(ledPin, LOW);
}
}