The usb cable provides 5vdc to the embedded boards which steps down the main source voltage to 33vdc. Wiring guide on how to connect coinslot to your nodemcu esp8266.
Dx 0337 System Wiring Diagram Besides Diagram Wiring Esp8266
Nodemcu wiring diagram. The nodemcu is an arduino compatible board that features the esp8266 at its core. Nodemcu power supply circuit diagram. Connect esp8266 nodemcu gpio d0 pin to in1 of relay 1 in board connect esp8266 nodemcu gpio d1 pin to in2 of relay 2 in board connect esp8266 nodemcu gpio d2 pin to in3 of relay 3 in board connect esp8266 nodemcu gpio d3 pin to in4 of relay 4 in board connect power source to esp8266 and realy board. The overall objective in wiring the esp8266 nodemcu to the microbit is to use one power supply. The power supply as you can see is based on the lm7805 voltage regulator. Two 470uf capacitors are connected at the input and output of the voltage regulator.
J1 is the female dc socket where you can connect a 12v adaptor or a 12v battery or a 9v battery. This is the first version of the nodemcu board featuring the esp 12. It became popular because it is a wifi ready microcontroller by itself no need for an arduino. The nodemcu and the microbit are both powered by a 33vdc voltage source obtained from a usb cable. Hindi po ito diy kung papanu gumawa ng diy wifi vendo na plug play. The circuit diagram is really simple as you can see.
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