User Manual

Step 1: Build the circuit

For C language users:

Step 2: Open the code file

cd /home/pi/SunFounder_Super_Kit_V3.0_for_Raspberry_Pi/C

Step 3: Compile the Code

make 07_relay

Step 4: Run the executable file above

sudo ./07_relay

Code Explanation

digitalWrite(relayPin, LOW); // set the I/O port as low level (0V) to energize the

transistor. The coil of the relay is powered and generate electromagnetic force, and the

relay closes.

digitalWrite(relayPin, HIGH); // Set the I/O port as high level (5V), thus the

transistor is not energized and the coil is not powered. There is no electromagnetic

force, so the relay opens.

For Python users:

Step 2: Open the code file

cd /home/pi/SunFounder_Super_Kit_V3.0_for_Raspberry_Pi/Python

Step 3: Run

sudo python 07_relay.py

Code Explanation

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