board.close() Optocoupler is a component that transfers electrical signals between two state of isolation circuits by using light, and prevent high voltage from affecting the system receiving the signal. My connections are, Vcc to 24vdc; Gnd to ground; In(1-8) to the digital outputs of my arduino.


NC stands for the normal close port contact and the state without power; No stands for the normal open port contact and the state with power.

Each submodular of the relay has one NC(nomalclose), one NO(nomalopen) and one COM(Common). This is a 5V 8-Channel Relay interface board, Be able to control various appliances and other equipment with large current. Can be used with Arduino microcontroller or Raspberry Pi. You can choose NC port or NO port according to whether power or not. time.sleep(2) （Pay attention to that there are only two submodules of the 8-channel relay are used in this example, but you can use the 8 submodules freely.） except: print ('FTD2xx device available...') This is a 8-channel LOW level trigger relay and it can be applied to Arduino and Raspberry Pi. if (None != dev): It can be controlled directly by Micro-controller (A Relay is an electrically operated switch. board.resetDevice() IMPORTANT NOTE: this module have 5 v operating voltage ... time.sleep(2) os.system('cls') Connect the signal terminal IN4、IN5 of 8-channel relay to digital port 3,2 of the SunFounder Arduino Mega2560 board, and connect an LED at the output terminal.（Pay attention to that there are only two submodules of the 8-channel relay are used in this example, but you can use the 8 submodules freely.） import os s = board.write('\x01') Able to open/close door and gate using an iPhone and Apple Watch via homebridge running on the Pi.A Relay is an electrically operated switch.
print ('Unable to get the BitMode of the device...') Tested on: python3.4, Win 10

Many relays use an electromagnet to mechanically operate the switch and provide electrical isolation between two circuits.All of these features make SainSmart relay a great component for automation projects. When the coil is not energized, the normally open contact is the one that is off, while the normally closed one is the other that is on. #relay 4 on $10.99 $ 10. - Equiped with high-current relay, AC250V 10A ; DC30V 10A . Controlling items such as curtains and movie screen. #relay 1 on It generally connects negative supply voltage and triggering terminal together. I bought an 8 channel dc 5v relay module for Arduino from an on-line store. s = board.write('\x80') s = board.write('\x02') There are two fixed contacts, a normally closed one and a normally open one. It generally connects positive supply voltage and triggering terminal together. #relay 2 on So there are 8 NC, 8NO and 8 COM of the channel relay in total. import time print ('Something went wrong trying to open communication with the FTD2xx device...') Low level trigger 8-channel relay capable of controlling 10A 30V DC or 10A 250V AC signals. After the coil is de-energized, the electromagnetic force disappears and the armature moves back to the original position, releasing the moving contact and normally closed contact. print (e) It works with the 8 channel relay to help you realize This Model helps you to avoid complicated wiring processes and save you much time to accomplish your goal. SIGN UP FOR OUR NEWSLETTER NOW import ftd2xx time.sleep(2) When a low level is supplied to signal terminal of the 8-channel relay, the LED at the output terminal will light up. It can be controlled directly by Micro-controller (This is a 5V 8-Channel Relay interface board, Be able to control various appliances and other equipment with large current. time.sleep(2)

A relay can be used to control high voltages with a low voltage by connecting it to an MCU. time.sleep(2) print ('No FTD2xx devices available, please check that its plugged in...') Many relays use an electromagnet to mechanically operate the switch and provide electrical isolation between two circuits.All of these features make SainSmart relay a great component for automation projects.Your input is very much appreciated. dev = None A relay can be used to control high voltages with a low voltage by connecting it to an MCU.

When triggering terminal has positive supply voltage or reaches triggering voltage, the relay will pull in. #all relays off

s = board.write('\x03') The relay has worked flawlessly.

#all relays off m = board.getBitMode() try: 99. #relay 3 on board.setBitMode(0xFF,0x4) #.... FREE Shipping on your first order shipped by Amazon. Packages: pip install ftd2xx - Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) .