![]() Four mounting bolts holes, diameter 3.From the datasheet, it has a forward current of 20mA and a max forward voltage of 1.7V. Both the ESP32 and the second control board are powered by 3.3V but they are independent power supplies. Each relay has a red status indicator LED I want to control another circuit that is completely isolated from the ESP32.Fault-tolerant design, even if the control line is broken, the relay will not operate. ![]() Jumper allowing relays to be trigged with a high or low signal.Each relay has a freewheeling diode protection.Each relay has an Optocoupler, providing optical isolation between switching circuit and relay.Relays can be controlled directly with 3.3V or 5V logic signals from a microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).The module size and functionally will however be identical. There are often also small visual differenced between batches.During shipping the relays might often get small scratches on them from other boards rubbing against them.The relays used are normally Songle or Tongling, which are both good quality and have the same specifications.Whereas for optoisolator relays, the control circuit is isolated from the load/device circuit. Any use of this module is at your own risk! Always take necessary safety precautions when working with high voltages to prevent electrical shock! We will take no responsibility for any damage, personal injury or death incurred due to using this unit with high voltages! Home Tutorials Arduino Controlling devices with the Opto-isolator Relay Controlling devices with the Opto-isolator Relay. High level trigger when jumper is on 'H' sideįor liability and safety reasons we DO NOT recommend using this module with voltages above 24V.Low level trigger when jumper is on 'L' side.The relay trigger level can be configured for high or low level via a pin header with jumpers: Allows your Arduino, Raspberry PI or MCU to control appliances and other high current usage. When the relay is turned on, COM and NO will be electrically connected. 1 x 2-Channel Opto-Isolated Relay ModuleReference Schematic. When the relay is turned off, COM and NC will be electrically connected. NC: Normally closed, connected to COM when relay is turned off.Connected to NC when relay is off, and NO when on NO: Normally open, connected to COM when relay is turned on.A high or low signal will turn the relay on, depending on the jumper settingsĮach relay output is available via a terminal block connector with following signals
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |