03:17
Faizan
You can use a power supply to provide power to an electrical circuit or to charge up a battery. If the circuit or battery is rated at a lower voltage than the power supply, the circuit or battery will be damaged. You can prevent this by employing a voltage divider. A voltage divider circuit is made up of two or more electrical resistors across a voltage source. Kirchhoff's Voltage Law explains that there will be a voltage drop across each resistor in a voltage divider circuit, and the sum of the voltage drops will equal zero. Therefore, if you connect two equal-value resistors in series to a 24-volt power supply, the voltage drop between the power supply and the electrical joint where the two resistors meet will be 12 volts.
Twist together one end of the first resistor with one end of the second resistor. Place the first ring terminal over the twisted wire pair, and solder the ring terminal to the twisted wire pair.
Use the electrical pliers to cut two lengths of wire 4 inches long. Strip 1/2 inch of insulation from each segment end.
Twist together one end of the first wire segment with the loose end of the first resistor. Solder the connection.
Twist together one end of the second wire segment with the loose end of the second resistor. Place the second ring terminal over the twisted wire pair, and solder the terminal to the twisted wire pair.
Connect the loose end of the first wire to the positive terminal on the power supply. Connect the loose end of the second wire to the negative terminal on the power supply. Turn on the power supply.
Turn on the multimeter, and set the scale to "Volts DC." Place the red multimeter probe on the first ring terminal. Place the black multimeter probe on the second ring terminal. Check the multimeter display; the voltage across the two ring terminals will be approximately 12 volts DC.
Twist together one end of the first resistor with one end of the second resistor. Place the first ring terminal over the twisted wire pair, and solder the ring terminal to the twisted wire pair.
Use the electrical pliers to cut two lengths of wire 4 inches long. Strip 1/2 inch of insulation from each segment end.
Twist together one end of the first wire segment with the loose end of the first resistor. Solder the connection.
Twist together one end of the second wire segment with the loose end of the second resistor. Place the second ring terminal over the twisted wire pair, and solder the terminal to the twisted wire pair.
Connect the loose end of the first wire to the positive terminal on the power supply. Connect the loose end of the second wire to the negative terminal on the power supply. Turn on the power supply.
Turn on the multimeter, and set the scale to "Volts DC." Place the red multimeter probe on the first ring terminal. Place the black multimeter probe on the second ring terminal. Check the multimeter display; the voltage across the two ring terminals will be approximately 12 volts DC.
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