feat: added documentation for Power Source (#157)

Author: Tejasgarg

images/buzzer_curve.jpg

@@ -1,8 +1,123 @@
-Power Source
-============
+# Power Source
 
-What's a Power Source
----------------------
+## What is a Power Source?
 
-Experiment: power your LED with PSLab
--------------------------------------
+A power source is an instrument used to supply power to other equipment and sensors, enabling them to operate. The power is provided in the form of voltage or current.
+
+## Current Power Source Ranges
+
+**Voltage Sources:**
+
+- **PV1**: ± 5 V
+- **PV2**: ± 3.3 V
+- **PV3**: 0-3 V
+
+**Current Sources:**
+- **PCS**: 0 - 3.3 mA
+
+## How to Use
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/variable_power_source.jpg" alt="_PSLab_ Pinout for Power Supply" width="300">
+</div>
+
+To use the variable power supply, connect the terminals from the _PSLab_ board to the output node according to your requirement.
+
+### Procedure for Supplying Power:
+
+1. Select the required power source from **PV1, PV2, PV3,** or **PCS**.
+2. Set the desired value for the power source.
+3. Connect the board to the equipment, such as an LED.
+
+## Experiment: Powering an LED with _PSLab_
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/dashboard.jpg" width="150">
+</div>
+
+### Goal
+
+To power an LED using the _PSLab_ inbuilt power supply.
+
+### Materials Required
+
+- Android Phone
+- [_PSLab_](https://play.google.com/store/apps/details?id=io.pslab\&hl=en_US)[ Android App](https://play.google.com/store/apps/details?id=io.pslab\&hl=en_US)
+- White LED with a power rating of approximately 3.2V
+
+### Procedure
+
+1. Open the _PSLab_ Android app.
+2. Select the **Power Supply** option.
+3. The app will display various power source options:
+   - **PV1**
+   - **PV2**
+   - **PV3**
+   - **PCS**
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/power_source.jpg" width="150">
+</div>
+
+4. Choose **Voltage Source 2 (PV2)** for this experiment and set its value to the LED voltage (~3.2V).
+5. Connect the ground and voltage terminals of PV2 to the LED terminals using connecting wires.
+6. Adjust the power source knob until the required voltage is reached.
+7. The LED will start glowing.
+
+### Observations
+
+- The LED illuminates when the correct voltage is applied.
+- The _PSLab_ successfully supplies the required power.
+
+### Conclusion
+
+The _PSLab_ power source can effectively power an LED.
+
+## Experiment: Powering a Buzzer with _PSLab_
+### Goal
+
+To power a buzzer using the _PSLab_ inbuilt power supply.
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/buzzer_curve.jpg" width="400">
+</div>
+
+### Materials Required
+
+- Android Phone
+- [_PSLab_](https://play.google.com/store/apps/details?id=io.pslab\&hl=en_US)[ Android App](https://play.google.com/store/apps/details?id=io.pslab\&hl=en_US)
+- Buzzer with a rating of 3V
+
+### Procedure
+
+1. Open the _PSLab_ Android app.
+2. Select the **Power Source** option.
+3. The app will display various Power Source options:
+   - **PV1**
+   - **PV2**
+   - **PV3**
+   - **PCS**
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/power_source_2.jpeg" alt="Buzzer Voltage dB Curve" width="150">
+</div>
+
+4. Choose **Voltage Source 1 (PV1)** and set its value to the buzzer's starting voltage (~2.5V).
+5. Connect the ground and voltage terminals of PV1 to the buzzer terminals using connecting wires.
+6. Adjust the power source knob until the required voltage is reached.
+7. **The buzzer will start producing sound.**
+8. Gradually increase the voltage to increase the buzzer's sound intensity.
+9. Adjust the voltage as needed to achieve the desired sound level.
+
+### Observations
+
+- The buzzer starts producing sound when the correct voltage is applied.
+- The _PSLab_ successfully supplies the required power.
+
+### Conclusion
+
+The _PSLab_ Power Source can effectively power a buzzer.
+## Important Features
+
+- **PV1 and PV3 are proportional to each other.**
+- **PV2 and PCS are also connected (inversely proportional).**