Circuit schematic for arduino controlled relay with optocoupler
Schematic for Arduino controlled relay using optocoupler.
The input pins of the module work inversely. As we can see the relay
will be activated when the input pin will be LOW because in that way the
current will be able to flow from the VCC to the input pin which is low
or ground, and the LED will light up and active the relay. When the
input pin will be HIGH there will be no current flow, so the LED will
not light up and the relay will not be activated.
Optocoupler PC817
Optocouplers and opto-isolators can be used on their own, or to switch a
range of other larger electronic devices such as transistors and triacs
providing the required electrical isolation between a lower voltage
control signal and the higher voltage or current output signal. Common
applications for optocouplers include microprocessor input/output
switching, DC and AC power control, PC communications, signal isolation
and power supply regulation which suffer from current ground loops, etc.
Comments
Post a Comment