Another version of the schematic is to add an optocoupler, effectively isolating the microcontroller from the high current that may come from the relay circuit here, the in pin of the module is attached to d3 of the arduino uno.
32+ Arduino 4 Relay Module Schematic Pics. This relay module has two channels (those blue cubes). Sep 13, 2016, 05:17 am.
4-Channel 5V Relay Module for Arduino DSP AVR PIC ARM from ardubotics.eu
How does the circuit works. Each relay has a normally open (no) and a normally closed (nc) the following schematic shows how to connect the module to an arduino, i have only shown one device (lightbulb) connected to one relay. Assemble all the parts as shown in the schematic diagram.
Most relay modules sold to connect to arduino are power relays and are rated for either 110v or 240v.
I reccently bought a 4 relay module so i can create a light switch to turn off 110v light bulbs. Most relay modules sold to connect to arduino are power relays and are rated for either 110v or 240v. Jump to different chapters of this video00:37 introduct01:00 hardware. Learn how to control 4 to 12 ac or dc loads using relay modules and arduino.
