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It can be useful for building your own energy monitor or for building an over-current protection device for an AC load
Under the hood
The 5V 8-Channel Solid-State Relay is somewhat similar to that of a mechanical relay & the difference is that there is no moving contact in a Solid-State Relay
It selects 4 bits of data from two sources under the control of a common data select input (S)
Bluetooth Low Energy application
Solenoid Valve 12v 1/2in Solar Water Heater Motor Wheels & Chassis It can be useful forSolenoid Valve 12v 1 2in Solar Water Heater 12V Electric Pressure Solar Water Heater Solenoid Valve Normally Closed 1 2" controls the flow of fluid plus air and acts as a valve between high pressure water or any fluid! The valve works with a solenoid coil which operates electronically with DC 12 volt supply. As it is normally closed assembly, it opens the flow of liquid as soon as power is ON and stops blocks the flow when the supply voltage is