These are step by step instructions on how to hack an old CD-ROM drive and turn it into a agitator for PCBs, biohacking projects and anything else you might need to shake continuously. All you need is a CD-ROM drive, breadboard, H-Bridge, a 10Kohm resistors Arduino, plastic container and power source for the Arduino (a toggle switch is optional).

Step 1: Get a Old CD-ROM Drive

Step 2: How to Set Up the Arduino and Breadboard

Step 3: The H-Bridge Connected to the Arduino (No Toggle Switch)

// Arduino Code:

const int switchPin = 2;    // switch input
const int motor1Pin = 3;    // H-bridge leg 1 (pin 2, 1A)
const int motor2Pin = 4;    // H-bridge leg 2 (pin 7, 2A)
const int enablePin = 9;    // H-bridge enable pin

void setup() {
// set the switch as an input:
pinMode(switchPin, INPUT);

// set all the other pins you're using as outputs:
pinMode(motor1Pin, OUTPUT);
pinMode(motor2Pin, OUTPUT);
pinMode(enablePin, OUTPUT);
// pinMode(ledPin, OUTPUT);

// set enablePin high so that motor can turn on:
digitalWrite(enablePin, HIGH);
}

void loop() {
// if the switch is high, motor will turn on one direction:

    digitalWrite(motor1Pin, LOW);   // set leg 1 of the H-bridge low
    digitalWrite(motor2Pin, HIGH); // set leg 2 of the H-bridge high
delay(500);                  // waits for a second

// if the switch is low, motor will turn in the other direction:

    digitalWrite(motor1Pin, HIGH); // set leg 1 of the H-bridge high
    digitalWrite(motor2Pin, LOW);   // set leg 2 of the H-bridge low
delay(500);                  // waits for a second

}