Published May 15, 2019 © GPL3+

First Project to Learn How to Use the Arduino Project Hub

In order to learn how to use the Project Hub for the first time I selected a simple solid state relay control.

BeginnerProtip758

First Project to Learn How to Use the Arduino Project Hub

Things used in this project

Hardware components

Crydom 6422 Solid State Relay

There are 2 relays available in a handy DIN mount carrier with an LED indicator.

Arduino UNO R3

Custom made jumper wires

120v 40w lamp and base

The SSR has a minimum current switching requirement so a 120v 40w lamp was chosen as an indicating load of .333ma to meet the load requirement.

AC power cord and wire nuts

Hand tools and fabrication machines

Ideal wire stripper

Small slotted screwdriver

Story

Project 1 - I'm starting with the UNO board as a base to interface various projects including:Crydom 6412/6422 buffered inverting/non-inverting solid state relay (SSR) which has additional input circuitry compatible with MOS devices to allow direct interface with the UNO I/O. The output of the SSR is capable of controlling 3.5amps of 24 to 240vac. I plan to write code to monitor and control various AC outputs including relays, contactors, and power sources. The UNO board arrived in a few days and was pre-loaded with the "Blink" sketch and worked right out of the box after connecting to my MAC USB port. Just to make sure the board was working properly I downloaded the "Blink" sketch again, watched to see the RX & TX LEDs functioned, and see that the "Blink" sketch operated again.

The "Blink" sketch was then edited and saved as a "Solid State Relay Test" to control digital pin 12 ON and OFF.

Next I constructed a few jumper wires needed to connect the SSR input to the UNO I/O. I used some surplus gold plated pins and soldered #26 stranded color coded wire and put some shrink-fit over the pins for protection from shorting.

Project jumper wires

2 Crydom SSR's in a DIN mount carrier

SSR Test Circuit

This project worked as planned and gave me the opportunity to get involved at an easy level and learn how to complete a project using the Project Hub.

Next, a 120vac to 9vdc wall transformer was adapted with the proper 2.1mm center positive plug, measured and then plugged into the external power (non-USB) jack. The transformer specs say 9vdc output at 250mA but the transformer output is 12.8vdc open circuit unloaded and the voltage at the input to the voltage regulator measures 10.4vdc which is within the safety voltage of 7-12dc for the regulator to keep it from overheating.

Now the UNO board can operate without connection to the USB port on my MAC.

Code

Solid State Relay Test

/*
  SSR ON/OFF Test

*/

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 12 as an output.
  pinMode(12, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(12, HIGH);   // turn pin 12 on (HIGH is the voltage level)
  delay(5000);                       // wait for 5 seconds
  digitalWrite(12, LOW);    // turn pin 12 off by making the voltage LOW
  delay(1000);                       // wait for 1 second
}

Credits

hkmeadows

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First Project to Learn How to Use the Arduino Project Hub

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics

Crydom Solid State Relay (SSR)

Code

Solid State Relay Test

Credits

hkmeadows

Comments

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First Project to Learn How to Use the Arduino Project Hub

First Project to Learn How to Use the Arduino Project Hub

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics

Crydom Solid State Relay (SSR)

Code

Solid State Relay Test

Credits

hkmeadows

Comments

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