Designing basic circuits to power devices

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SUMMARY

The discussion focuses on designing a circuit to power a device requiring a terminal voltage of 12 volts and a current of 2 Amps, using 3 ohm resistors with a 24 Volt EMF supply. To achieve the necessary voltage drop, participants suggest calculating the equivalent resistance and exploring both series and parallel configurations. The application of Ohm's Law (V=IR) is emphasized to determine the appropriate resistor arrangement to ensure the device receives the correct voltage and current.

PREREQUISITES
  • Understanding of Ohm's Law (V=IR)
  • Knowledge of series and parallel resistor configurations
  • Ability to calculate equivalent resistance
  • Familiarity with basic circuit design principles
NEXT STEPS
  • Research how to calculate equivalent resistance in series and parallel circuits
  • Learn about voltage dividers and their applications in circuit design
  • Explore practical circuit simulation tools like LTspice or TINA-TI
  • Study the impact of load resistance on circuit performance
USEFUL FOR

Electronics students, hobbyists designing basic circuits, and engineers looking to understand voltage regulation in power supply systems.

alexk307
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Homework Statement


Device requires a terminal voltage of 12 volts and a current of 2 Amps. Design a circuit using as many 3 ohm resistors as needed to properly power this device. The EMF is 24 Volts.


Homework Equations


Ohm's law: V=IR


The Attempt at a Solution


I know how to find equivalent resistance, but I don't know how to dissipate some of the voltage, in this case, get the voltage from 24 down to 12.
 
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Calculate the resistance of the device from the fact that V=12V and I=2A.
If the pd across it is to be 12V but the supply is 24V, then you need a circuit in which there is 12V combined across the available 3 ohm resistors and 12V across the device.
Does that help? Try both a series and parallel circuit to see which will do the job.
 

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