Solid State Relay Circuit Arduino

As there are no moving parts there is wearing out problem and the switching action is faster than mechanical relays.
Solid state relay circuit arduino. Here we are not using any relay driver ic like uln2003 and will only use an npn transistor to control relay. Solid state relay with arduino project circuit diagram project circuit is simple connect the dht22 digital pin with the digital pin 2 of arduino. Since the arduino operates at 5v it can t control these higher voltage devices directly but you can use a 5v relay to switch the 120 240v current and use the arduino to control the relay. How to make relay circuit board for arduino.
Many relays use an electromagnet to mechanically operate a switch but other operating principles are also used such as solid state relays. The circuit is a fully efficient relay in solid state form and can be used as a replacement to mechanical relays or expensive solid state relay ics. Learn arduino in 30 minutes video. Relays are used where it is necessary to control a circuit by a.
In this arduino relay control tutorial we will simply learn how to interface a relay with arduino. Solid state relay optocoupler relay solid state relay is a type of switch to activate load by using without any mechanical parts. Keyestudio solid state relay 8 channel 5v for raspberry pi arduino pic avr dsp arm relay switch module high low level trigger ac240v 2a output 18 50 18. A relay accomplishes this by using the 5v outputted from an arduino pin to energize the electromagnet which in turn closes an internal physical switch to turn on or off a higher power circuit.
Between the dht22 vcc and data pin insert a 10k pull up resistor. The switching contacts of a relay are. A relay is an electrically operated switch.