feat :added documentation for multimeter

Author: Tejasgarg

images/555_timer.jpg

@@ -1,32 +1,228 @@
-Multimeter
-==========
-
-What's a Multimiter
--------------------
-
-How to use it
--------------
-
-> 1.  To measure volatage, connect PV1, PV2, PV3 to CH1, CH2, CH3 pins
->     on PSLab board respectively and turn knob to either of the channel
->     labels in the Multimeter instrument in PSLab Android application
->     to see the volatage at corresponding PV pins.
-> 2.  To measure resistance, connect desired resistor between RES and
->     GND pin on PSLab board and then turn the knob to resistance symbol
->     in PSLab Android application Multimeter instrument.
-> 3.  To measure capacitance, connect desired capacitor between CAP and
->     GND pin on PSLab board and then turn the knob to resistance symbol
->     in PSLab Android application Multimeter instrument.
-> 4.  Frequency and count pulse can be measured by connecting any
->     desired element between ID (or LA) and GND pins on PSLab board and
->     turning knob to respective label in PSLab Android application
->     Multimeter instrument.
-
-Experiment: Measuring Voltage (check your battery)
---------------------------------------------------
-
-Experiment: Measuring Resistance
---------------------------------
-
-Experiment: Measuring Capacitance
----------------------------------
+# Multimeter
+
+## What's a Multimeter
+A multimeter is an electronic tool used to measure various electrical properties such as voltage, current, resistance, capacitance and frequency.
+It is used for measuring the values of voltage and current at various points in a circuit that can be used for analysis of the electrical circuits and help in troubleshooting.
+
+## How to use it
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/desk_home_screen.jpg" alt="home screeen" width="400">
+</div>
+
+
+* Open the _PSLab_ app
+
+* Navigate to the multimeter option on the _PSLab_ app home screen
+
+* Select the type of the required measurement needed :
+    * Voltage
+    * Frequency
+    * Clock Pulses
+    * Resistance
+    * Capacitance
+
+* For measuring voltage we use:
+    * CH 1
+    * CH 2
+    * CH 3
+    * VOL
+    * CAP(Capacitive pin voltage measurement)
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/multimeter.jpg" alt="PSLab Pinout for power supply" width="250">
+</div>
+
+* For measuring the frequency(Upto 4 MHz) or clock pulses:
+    * Logic Analyser 1
+    * Logic Analyser 2
+    * Logic Analyser 3
+    * Logic Analyser 4
+
+* For measuring capacitance:
+    * -| (- (pF to uF range)
+
+* For measuring resistance:
+    * Ω
+
+### Important Features
+* Multimeter Configuration:
+    * <strong>Update period</strong> can be selected 
+    * <strong>Location data</strong> can be included in the logged files
+
+* Logged data:
+    * It stores the logs of the data collected by the multimeter
+
+
+## Experiment: Measuring Resistance with _PSLab_
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/battery.jpg" width="150">
+</div>
+
+### Goal
+To measure the voltage of a battery using _PSLab_
+
+
+### 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)
+- Battery(9V)
+
+### Procedure
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/measure_voltage.jpeg" width="200">
+</div>
+
+1. Open the _PSLab_ Android app.
+2. Select the **Multimeter** option.
+3. The app will display various Multimeter options:
+   - **Voltage**
+   - **Hz**
+   - **Count Pulse**
+   - **Measure**
+
+4. Choose **VOl** in **Voltage** .
+5. Connect the voltage and ground terminals of the battery to VOL and ground respectively using connecting wires.
+6. **The Voltage is displayed** and stored in the logs
+
+### Observations
+
+- The value of the Multimeter starts increasing as the battery is connected.
+- The _PSLab_ successfully measures the battery.
+
+### Conclusion
+
+The _PSLab_ measures the battery voltage.
+
+## Experiment: Measuring Voltage (check your battery) with _PSLab_
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/resistor.jpg" width="150">
+</div>
+
+### Goal
+To measure the resistance of a resistor using _PSLab_
+
+
+
+### 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)
+- Resistor(220 Ω)
+
+### Procedure
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/measure_resistance.jpeg" width="200">
+</div>
+
+1. Open the _PSLab_ Android app.
+2. Select the **Multimeter** option.
+3. The app will display various Multimeter options:
+   - **Voltage**
+   - **Hz**
+   - **Count Pulse**
+   - **Measure**
+
+4. Choose **Ω** in **Measure** .
+5. Connect the end terminals of the resistor to resistance and ground respectively using connecting wires.
+6. **The Resistance is displayed** and stored in the logs
+
+### Observations
+
+- The value of the resistor is displayed in the multimeter.
+- The _PSLab_ successfully measures the resistor.
+
+### Conclusion
+
+The _PSLab_ measures the resistance of the resistor.
+
+## Experiment: Measuring Capacitance with _PSLab_
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/capacitor.jpg" width="200">
+</div>
+
+### Goal
+To measure capacitance using _PSLab_
+
+### 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)
+- Capacitor(110 pf)
+
+### Procedure
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/measure_capacitance.jpeg" width="200">
+</div>
+
+1. Open the _PSLab_ Android app.
+2. Select the **Multimeter** option.
+3. The app will display various Multimeter options:
+   - **Voltage**
+   - **Hz**
+   - **Count Pulse**
+   - **Measure**
+
+4. Choose **-| (-** in **Measure** .
+5. Connect the voltage and ground terminals of the capacitor to Capacitance and ground respectively using connecting wires.
+6. **The Capacitance is displayed** and stored in the logs
+
+### Observations
+
+- The value of the capacitor is displayed in the multimeter.
+- The _PSLab_ successfully measures the capacitor.
+
+### Conclusion
+
+The _PSLab_ measures the capacitance of the capacitor.
+
+## Experiment: Measuring Frequency with _PSLab_
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/555_timer.jpg" width="200">
+</div>
+
+
+### Goal
+To measure frequency using _PSLab_
+
+
+### 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)
+- 555 timer board(6.86Hz)
+
+### Procedure
+
+<div style="float: right; margin-right: 10px;">
+  <img src="../images/measure_frequency.jpeg" width="200">
+</div>
+
+1. Open the _PSLab_ Android app.
+2. Select the **Multimeter** option.
+3. The app will display various Multimeter options:
+   - **Voltage**
+   - **Hz**
+   - **Count Pulse**
+   - **Measure**
+
+4. Choose **LA1** in **Hz** .
+5. Connect the voltage and ground terminals of the 555 timer board to Logic Analyser 1 and ground respectively using connecting wires.
+6. **The Frequency is displayed** and stored in the logs
+
+### Observations
+
+- The frequency value is displayed on the multimeter.
+- The _PSLab_ successfully measures the frequency.
+
+### Conclusion
+
+The _PSLab_ measures the frequency of the 555 timer board.