Digital multi-meter uses 

1. Voltage Measurement:
   • Checking the voltage levels in electrical circuits to ensure proper operation.
   • Verifying the output of power supplies.
2. Current Measurement:
   • Measuring the current flowing through a circuit to assess its performance.
   • Troubleshooting issues related to excessive or insufficient current.
3. Resistance Measurement:
   • Testing the resistance of resistors or other components in a circuit.
   • Identifying open or short circuits.
4. Continuity Testing:
   • Checking for the continuity of a conductor or verifying the integrity of a connection.
   • Locating breaks or faults in wiring.
5. Diode Testing:
   • Verifying the functionality of diodes in electronic circuits.
   • Identifying faulty or damaged diodes.
6. Capacitance Measurement:
   • Measuring the capacitance of capacitors in electronic circuits.
   • Assessing the health of capacitors and identifying faulty ones.
7. Frequency Measurement:
   • Determining the frequency of an AC signal in electronic circuits.
   • Troubleshooting issues related to signal frequency.
8. Temperature Measurement:
   • Some advanced digital multi meters come with temperature measurement capabilities, allowing users to measure temperature in electronic components or environments.
9. Transistor Testing:
   • Some DMMs have the capability to test transistors for proper functioning.
   • Identifying transistor pin configurations and characteristics.
10. Battery Testing:
    • Checking the voltage of batteries for various devices.
    • Assessing the overall health and charge of a battery.
11. Fault Diagnosis:
    • Locating and diagnosing faults in electrical circuits.
    • Troubleshooting electronic devices and systems.
12. Automotive Applications:
    • Checking the electrical systems in vehicles, including battery voltage and continuity in wiring.
    • Troubleshooting automotive electrical issues.