Make A Coin slot detector Using Arduino

Get your ingredients together!

for this project you’ll need:
-11.5 x 14.5 in fabric
-conductive thread
-lilypad Arduino
-vibrating motor
-1N4004 diode
-photoresistor (sometimes called photo cell)
-1.5 to 5 V step-up battery pack
-wire
-wire cutters
-thread
-snaps
-snap tool
-suspender clips
-plastic tubing

For prototyping (not pictured):
-Breadboard (you can buy this at Radio Shack)
-Arduino Diecimila
-USB cable
-Alligator clips (also buy these at Radio Shack)
-USB to Serial Converter
-female headers
-headers

Step 3: Program in Arduino 0012

/*Coin Slot Detector
by Amy Khoshbin
2008*/

int photoPin = 0; // Analog input pin that the photo resistor is attached to
int photoValue = 0; // value read from the photoresistor
int vibPin = 9;
boolean isVibrating = false;

void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
pinMode(vibPin, OUTPUT);
}

void loop() {
photoValue = analogRead(photoPin); // read the pot value
Serial.println(photoValue); // print the pot value back to the debugger pane

vibrate();

delay(10); // wait 10 milliseconds before the next loop
}

void vibrate(){
//change the values greater than and less than to fit the sensitivity of the photoresistors you use

if(photoValue > 500 && isVibrating == false){
digitalWrite(vibPin, HIGH);
isVibrating = true;
}

if(photoValue < 500 && isVibrating == true) {
digitalWrite(vibPin, LOW);
isVibrating = false;
}

}

if your program runs, and you’re getting the photoresistor to get values into the Arduino and vibrate the vibrating motor, then you’re ready to move onto the Lilypad Arduino. To program this microcontroller, you need to use an USB to Serial converter.

Since the Lilypad doesn’t have headers soldered to them for easy prototyping or programming, I recommend using alligator clips.

First get female headers, then cut 4 off of the strip, and solders wires to each lead. Connect the female headers to the Gnd/RX/TX/Power headers on the Lilypad.

Then cut another 4 female headers and solder them to the USB to Serial Converter in the Gnd/RX/TX/Power holes. Attach the wires from the headers on the Lilypad Arduino to the USB to Serial Converter headers.

Attach the USB to Serial Converter to the computer via a USB cable. In the Arduino programming environment, go to the Tools menu, go to Board, and set it to Lilypad Arduino & set your Serial Port to the top one on the list. Then press the Upload to Board button in the Arduino programming environment, then press the Reset button on the Lilypad Arduino, and watch the program upload.

Once uploaded, we can start making the Coin Slot Detector!