May 17, 2011

Bat gloves in progress

Last Autumn I started playing around with Tony Messina’s Simple Bat Detector circuit. I made a few boards and got as far as sticking one of them in an mp3 player armband …before the local bat population went into hibernation!

After being in the park one evening recently with bats swooping low overhead, I decided it was time to dig out the circuits again and get them tested and used.

Over the winter I’ve only been able to test with the ultra-sonic rangefinder I use in my sonar goggles, so I knew the circuit works, but I needed to see if it worked with airborne moving targets!

Simple bat detector

I rehoused the armband detector into something more sturdy and finally managed to coordinate with dusk and dry(ish) weather the other night to give it it’s first testing in the field.

It works!

I wandered around the park the other evening and found a bat flightpath that was conveniently located above a bench. I was able to use the detector to pick up a few clicks each time the bats zipped past. A really nice moment of making the invisible audible. If you know what I mean.

Bat gloves in progress

Meanwhile, however, I’m really unhappy with the crystal earpiece as the interface through which to experience this somewhat magical thing, so I’ve been working with some soft circuit techniques to develop some bat gloves.

There’s still a lot of sewing to do and, I expect, quite a lot of testing down at the park as well, but I’m really happy with the early experiments and how these transform the whole interaction.

That’s all I’m going to say for now…

October 31, 2010

Blinking bats

A second slice of LED-based Halloween goodness.

Blinking bats from nikkipugh on Vimeo.

These bats will be part of my attire for later today, but they’re really quite pleasing just by themselves!

A really simple build using an Arduino-based Real Bare Bones Board, some cardboard, some insulation tape some wire and 14 LEDs.

Here’s the code:

/*
blinking bats
nikki pugh 30th October, 2010
Attribution-NonCommercial-ShareAlike Creative Commons
Powers LED eyes for a colony of bats, blinking them in a random sequence at random intervals
http://npugh.co.uk/blog/blinking_bats/

LED pairs with 330ohm resistors in series, connected between the output pins and ground.
*/

int colonySize = 7; // How many bats do you have?

//control pins for each bat

int bat1 = 2; // bat1
int bat2 = 3; // bat 2
int bat3 = 4; // bat 3
int bat4 = 5; // bat 4
int bat5 = 6; // bat 5
int bat6 = 7; // bat 6
int bat7 = 8; // bat 7
int bat8 = 9; // bat 8
int bat9 = 10; // bat 9
int bat10 = 11; // bat 10
int bat11 = 12; // bat 11

int gap = 3; // gap before selecting next bat to blink
int colony[] = {bat1, bat2, bat3, bat4, bat5, bat6, bat7, bat8, bat9, bat10, bat11}; // Put bat IDs into an array
int batSelect = 1; // your bat selection variable - used for selecting a bat ID from the above array
int blinker = bat1; // the bat selected to blink
int i = 0; // counter for start-up blinks

void setup() {

randomSeed (analogRead (0)); //read from the (unused) analogue pin to get a value to seed the "pseudo-random number generator"

pinMode(bat1, OUTPUT); // set pins to be outputs
pinMode(bat2, OUTPUT);
pinMode(bat3, OUTPUT);
pinMode(bat4, OUTPUT);
pinMode(bat5, OUTPUT);
pinMode(bat6, OUTPUT);
pinMode(bat7, OUTPUT);
pinMode(bat8, OUTPUT);
pinMode(bat9, OUTPUT);
pinMode(bat10, OUTPUT);
pinMode(bat11, OUTPUT);

}

void loop() {

for (i = 0; i< 3; i ++) { //blink all bats' eyes at start-up digitalWrite(bat1, HIGH); digitalWrite(bat2, HIGH); digitalWrite(bat3, HIGH); digitalWrite(bat4, HIGH); digitalWrite(bat5, HIGH); digitalWrite(bat6, HIGH); digitalWrite(bat7, HIGH); digitalWrite(bat8, HIGH); digitalWrite(bat9, HIGH); digitalWrite(bat10, HIGH); digitalWrite(bat11, HIGH); delay (200); digitalWrite(bat1, LOW); digitalWrite(bat2, LOW); digitalWrite(bat3, LOW); digitalWrite(bat4, LOW); digitalWrite(bat5, LOW); digitalWrite(bat6, LOW); digitalWrite(bat7, LOW); digitalWrite(bat8, LOW); digitalWrite(bat9, LOW); digitalWrite(bat10, LOW); digitalWrite(bat11, LOW); delay (200); } digitalWrite(bat1, HIGH); //all eyes back on again digitalWrite(bat2, HIGH); digitalWrite(bat3, HIGH); digitalWrite(bat4, HIGH); digitalWrite(bat5, HIGH); digitalWrite(bat6, HIGH); digitalWrite(bat7, HIGH); digitalWrite(bat8, HIGH); digitalWrite(bat9, HIGH); digitalWrite(bat10, HIGH); digitalWrite(bat11, HIGH); while (true){ // infinite loop gap = random(1, 5); //wait some seconds before selecting next bat delay(gap*1000); batSelect = random (0, colonySize-1); //select a bat at random blinker = colony[batSelect]; digitalWrite(blinker, LOW); //blink delay(200); digitalWrite(blinker, HIGH); } }

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