Hey guys! I am an engineering student working on a project where we must control humidity and temperature in a box.
The Arduino would control the inlet and outlet fans (x1 and x2, respectively), an ultrasonic fogger (x1) and heat lamps (x2, 100 Watts each, AC 90-120V). It would display the temperature and humidity on a small LCD display.
I was wondering how I would possibly interface the heat lamps with the Arduino if they are using E26 sockets with a plug for wall socket? Would the Arduino need to control an external power supply or would I need to strip the wires of the E26 socket and plug them directly into the Arduino?
Sorry if my nomenclature is confusing, I am very new to Arduino and any advice will help! I attached pictures to help explain the components.
Piece of cake to control the lamps. Use a solid state relay that is rated for the voltage and current of the combined lamps. Plug the lamps into a power strip and wire the SSR in series with the hot lead of the power strip.
The SSR used a 5 volt signal from the Arduino to turn on or off.
Buy an Arduino Relay Shield, make sure the relays meet the voltage and current draw of your lights, then write a digital pin high/low to activate the light ect..
Paul_KD7HB:
Piece of cake to control the lamps. Use a solid state relay that is rated for the voltage and current of the combined lamps. Plug the lamps into a power strip and wire the SSR in series with the hot lead of the power strip.
The SSR used a 5 volt signal from the Arduino to turn on or off.
Paul
Thank you so much! I will try this. Do I have to strip the wires of the power strip in order to wire it in series with the SSR?
SADLY..basically only 2 plugs are controlled, and it only has 1 digital input to control the 3 plugs..if anyone finds something that has 4 plugs that can be controlled please share with us.. i would love something like this that had separate control for 4 plugs that dont require any cutting.
The advantage of these modules is they also have a built-in zero crossing detector. So, you can implement AC cycle chopping control if you want to. That's in addition to being able to control by low-frequency PWM or bang-bang just like an SSR.
For temprature and humidity algorithm, I think it PID controller can be used. I am interested in your project. If possible, after finishing, please share me your project
IoT_hobbyist:
I think it PID controller can be used.
A PID would be way over-kill and unnecessarily complex for this application. All the temperature control needs is a simple bang-bang regulator with a degree of hysteresis on each side of the set point. It's simple and guaranteed stable.
