Node.js Raspberry Pi GPIO - LED และปุ่มกด

ดูภาพประกอบด้านบนของวงจร

1. Starting with the circuit we created in the last chapter:
   On the Raspberry Pi, connect the female leg of a jumper wire to a 5V power pin. In our example we used Physical Pin 2 (5V, row 1, right column)
2. On the Breadboard, connect the male leg of the jumper wire connected to the 5V power, to the Power Bus on the right side. That entire column of your breadboard is connected, so it doesn't matter which row. In our example we attached it to row 1
3. On the Breadboard, connect the push button so that it fits across the Trench. In our example it connects to rows 13 and 15, columns E and F
4. On the Breadboard, connect one leg of the 1k ohm resistor to the Ground Bus column on the right side, and the other leg to the right side Tie-Point row where it connects to one of the right side legs of the push button. In our example we attached one side to Tie-Point row 13, column J, and the other side to the closest Ground Bus hole
5. On the Breadboard, connect a male-to-male jumper wire from the right Power Bus, to the right Tie-Point row that connects to the other leg of the push button. In our example we attached one side to Tie-Point row 15, column J, and the other side to the closest Power Bus hole
6. On the Raspberry Pi, connect the female leg of a jumper wire to a GPIO pin. In our example we used Physical Pin 11 (GPIO 17, row 6, left column)
7. On the Breadboard, connect the male leg of the jumper wire to left Tie-Point row the Push Button leg that is directly across the Ground connection leg.  In our example we attached it to row 13, column A

Your circuit should now be complete, and your connections should look pretty similar to the illustration above.

Now it is time to boot up the Raspberry Pi, and write the Node.js script to interact with it.