+5V (Red wire at input terminal) - VCC of relay board.
If you are using any other type of voltage regulator, use your knowledge to give input and take output from it.Ĭonnect the relay board and test for working on the power supply.Power on the adaptor after double checking the connections and set the output voltage to 3.3 by changing the potentiometer.Connect other 2 red and black jumper wires to output screw terminals.Connect the power adaptor to input screw terminals of regulator in correct polarity.Twist and tin the ends of other 2 jumper wires.Use a multimeter to check positive and negative ends. Strip the ends and connect them to red(to positive) and black(to negative) jumper wires in correct polarity. Take power adaptor and cut the connector end.Even a cheap IC like LM317 or LM1117 will do.ĬP2102 USB UART module - or any other 3.3V compatible USB-TTL UART adaptor LM2596 DC to DC 3A Step Down Module with Voltage Display - or any other step down voltage regulator to convert 5V to 3.3V for ESP module. The module is loaded with NodeMCU firmware which support Arduino like functions for GPIO and lua scripting support. A CP2102 USB-UART is used to program and configure the ESP module. A 5V 2A AC power supply, a voltage regulator and optoisolated 2 relays board is used. It has pinout headers which provides very easy connectivity with other devices. This project is very simple and uses an ESP8266 module ESP-01. Video of working project and overview of making process. Its a small and dirt cheap device which has a inbuilt controller running at 80Mhz and with optional firmware it can be used as a stand alone device without a microcontroller like arduino. ESP8266 is a very popular device for IoT these days.
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