Creating many additional 5V and GND outputs on Arduino without soldering

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When creating schemes with Arduino, I often required many 5V and GND contacts for connecting devices such as potentiometers.

For low-power devices (potentiometers, other sensors, low-power LEDs), we can use digital pins Arduino for a such purpose.

For example, to output GND on digital pin 3, write the following:
    pinMode(3, OUTPUT);
    digitalWrite(3, LOW);

To output 5V on the digital pin 4, write the following:
    pinMode(4, OUTPUT);
    digitalWrite(4, HIGH);

Now we have two additional pins with GND and 5V, which we can use for connecting!

Note: using PWM pins and analogWrite() function, we can set any voltage value between 0 and 5V.


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