8 Channel 5V Relay Module - Wiki IntroductionPrinciple of RelayFeaturesPorts DescriptionTesting ExperimentResourcesThis is a 8-channel LOW level trigger relay and it can be applied to Arduino and Raspberry Pi. Relays are suitable for driving high power electronic devices such as lights, electric fans and air condition. A relay can be used to control high voltages with a low voltage by connecting it to an MCU.See more on wikiounder Solid State Relay or Solid State Switch Solid State Relay Input. One of the main components of a solid state relay (SSR) is an opto-isolator (also called an optocoupler) which contains one (or more) infra-red light-emitting diode, or LED light source, and a photo sensitive device within a single case. The opto-isolator isolates the input from the output. DIY Solid State Relay - ElectroSchematics One advantage of solid-state relay (SSR) over conventional electro-magnetic relay (EMR) is its tear and wear free operation. S201S01 from Sharp is a good example. Here is the circuit diagram of a DIY SSR project, which is in fact an isolated triac power controller. OMRON 2/4/8-Ch 5V Solid State Relay | SainSmart 3. 8-CH relay OMRON 5V solid state relays This item has been assembled, and electrical test passed. Led indicator for each relay. FR-4 Fiber glass PCB ( Double Layer ). How to Bench Test a Solid Solid State Relays; Theory of PDF filea solid state relay is to construct a simple test circuit consisting of a DC power supply or battery (a 9Vdc battery will work fine in most cases) and a 60W or 100W light bulb. Fig. 1 below shows the basic wiring diagram for testing a DC input solid state relay. When the AC mains is applied to the output of the ARDUINO - SOLID STATE RELAY FAN/ventilator Control Using ARDUINO - SOLID STATE RELAY FAN/ventilator Control Using the W1209 Thermistor and SSR-25 DA : Hello world! Today i made a Ventilator / FAN controller for growing tents or rooms, the controller works pretty simple when the temperature is for example below 25 the Ventilator/Relay will be OFF, as soon as it become above 25 the ventilato..