Published March 21, 2018 © GPL3+

Lane Tech HS - PCL - Lamp And Radio Alarm

This project was part of the Lane Tech HS Physical Computing Lab course. I created this project as part of the Home Automation/IoT project.

IntermediateFull instructions provided6 hours738

Lane Tech HS - PCL - Lamp And Radio Alarm

Things used in this project

Hardware components

Particle Photon

Relay (generic)

extension cord

Adafruit Bakelite Universal Perfboard Plate

Jumper wires (generic)

Adafruit 36-pin 0.1" Female header

Micro-USB to USB Cable (Generic)

Wall Power Adaptor 1 Amp

Software apps and online services

IFTTT Maker service

Hand tools and fabrication machines

Soldering iron (generic)

Cordless Drill

Story

This project uses two 120V relays and a particle photon to create an internet enabled power strip that I use as an alarm clock.

Enclosure:

The enclosure for this project is a wooden box that I had around the house. It is approximately 7"x7"x7". It ended up being larger than necessary and could be replaced with another box.'

Connecting Extension Cords to Relays:

Both of my extension cords were longer than was necessary for the size of my enclosure. To remedy this, I cut the middle section of each cords, leaving about two inches on both the plug and outlet sides of the cord. I then spliced together the neutral side of the cord (thin prong) and tinned each each of the ends of the hot side (wide prong).

The ends of the cord are then inserted into the relay. I connected the plug end to common input and the outlet end to normally closed so that I could still use the cords if the photon was off.

Note: Use Electrical Tape to Cover the Bottom and Terminals of the Relay to Prevent Short Circuits

Soldering the Perf Board and Button:

Cut the female headers to 12 pins in length and solder them to the perf board seven rows apart. Solder one female header pin each to connect to D0, D2, D4, and one GND pin and 2 each to the other GND pin and VIN.

Solder two wires to terminals at opposite corners of the tactile button:

Mounting:

Drill four holes in the top of the box so that the button's wires can pass through and the button can be flush with the top of the box.

Drill two sets of two holes in the side of the box near the bottom of where each outlet will be placed.

Attach the extension cords using zip ties passed through the holes and around the cords:

Setting The Alarm:

I connected one of the modified extension cords to a CD-Player/FM Radio and the other to a lamp near my bed. I used IFTTT's time and date widget to trigger an event to turn on the lamp and then the radio 15 minutes later. Pressing the button turns them off. I also added button widgets via IFTTT to turn on the lamp and radio independently and to turn both off.

Code

Lamp/Radio Alarm

int relay1 = D0;
int relay2 = D2;
int btn = D4;
bool lamp = false;
bool radio = false;
bool awake = false;

void setup() {
    pinMode(relay1, OUTPUT);
    pinMode(relay2, OUTPUT);
    pinMode(btn, INPUT_PULLUP);
    Particle.subscribe("time_to_turn_on_lamp", myLamp);
    Particle.subscribe("time_to_turn_on_radio", myRadio);
    Particle.subscribe("lamp_and_radio_reset", myReset);
}

void loop() 
{
    int btnState = digitalRead(btn);
    if(btnState == LOW )
    {
        lamp = false;
        radio = false;
    }
    if(lamp == true)
    {
        digitalWrite(relay1, HIGH);
    }
    else
    {
        digitalWrite(relay1, LOW);
    }
    if(radio == true)
    {
        digitalWrite(relay2, HIGH);
    }
    else
    {
        digitalWrite(relay2, LOW);
    }
    
}
void myLamp(const char *event, const char *data)
{
    lamp = true;
}
void myRadio(const char *event, const char *data)
{
    radio = true;
}
void myReset(const char *event, const char *data)
{
    radio = false;
    lamp = false;
}

Credits

Nick Udell

3 projects • 1 follower

Student, maker, roboticist, aspiring engineer

Lane Tech HS - PCL - Lamp And Radio Alarm

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Enclosure:

Connecting Extension Cords to Relays:

Soldering the Perf Board and Button:

Mounting:

Setting The Alarm:

Schematics

Wiring

Code

Lamp/Radio Alarm

Credits

Nick Udell

Comments

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Lane Tech HS - PCL - Lamp And Radio Alarm

Lane Tech HS - PCL - Lamp And Radio Alarm

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Enclosure:

Connecting Extension Cords to Relays:

Soldering the Perf Board and Button:

Mounting:

Setting The Alarm:

Schematics

Wiring

Code

Lamp/Radio Alarm

Credits

Nick Udell

Comments

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