Every electronic circuit requires the best for optimal performance. Most electronic components require a regulated DC power supply, and some applications require a dual power supply source comprising Positive (+V), Ground (GND), and Negative (GND) (-V). Using a step down transformer and linear voltage regulators, you may build a dual power supply circuit in this tutorial.
What is a Dual Power Supply?
A Dual power supply designed as a regular direct current power supply. It offers positive as well as negative voltage. It provides a consistent power supply to the device and aids in the prevention of system damage.
Dual power supplies are circuits that generate two different output voltages from a single input source. There are numerous types and configurations possible. The most common configuration provides two different positive DC voltage outputs or two equal magnitude and opposite polarity DC voltage outputs.
Advantages of Dual Power Supply
- Constant Power
Instantaneous power in a single–phase circuit varies sinusoidally. A dual power supply, on the other hand, ensures that a device receives steady power when one power source fails for whatever reason.
- Multiplies Supply Frequency
Dual DC power supply double the the supply frequency.
- Increases Power Output
When a dual DC power supply is used instead of a single power source, more power is ensured. It multiplies the power supply by two, just like supply frequency.
It is less expensive to use a dual DC power supply. A dual DC power supply is less expensive than a single DC power supply. It’s also useful in situations where extra power is required to increase existing amps. As it may not be required to run a significant load, the supplementary power supply does not need to be of higher wattage. For example, the old power can be used to run the fan and pumps, while the new DC source can be used to power the motherboard and other desktop computer components.
- Ease of Installation
The installation of a dual DC power supply to an existing direct current power supply is simple and takes less than 20 minutes. Simply locate the second power supply’s source and extend a cord from the case to connect the green pin and any black pins from the main power supply to the auxiliary power supply.
- Constant Power
A dual DC power supply ensures a consistent and uninterruptible power source for a rig. A desktop computer, once again, can receive two power supplies, one for the fan and the other for the motherboard. This configuration ensures that power is not compromised when a device is turned on due to voltage fluctuations. When we add a load to an electricity supply, it can fluctuate. Electric current fluctuation is one of the leading reasons of computer system failure, so having steady power is advantageous.
- Convenient Temperature
Extra power supply does not change the case temperature as may logically be expected.
Dual power, for example, allows an ATM machine’s air conditioning component to be turned off while not in use without disrupting the overall power supply.
For a variety of reasons, having a dual electric power supply is essential. It not only ensures a constant power supply to a device, but it also protects the system from damage. It increases power output, allowing for many uses of power. In a nutshell, it assures a constant supply of direct current electricity.
Types of Dual Power Supply
Most electronic circuit and application requires DC voltage range mostly falls in 5, 12 and 15 Volts, hence three types of dual power supply circuit listed as,
- 5 Volt Dual power supply circuit
- 12 Volt Dual power supply circuit
- 15 Volt Dual power supply circuit
All circuits have individual step down transformers and voltage regulators, you may include an LED indicator if you need.
5 Volt Dual power supply circuit diagram
12 Volt Dual power supply circuit diagram
15 Volt Dual power supply circuit diagram
Applications of Dual Power Supply Circuit:
- In Audio amplifiers, operational amplifiers, power amplifiers we use a dual power supply.
- In the low voltage direction of the DC motor, we can use this dual power supply.
- In 12V battery charging circuit.
- In a cell phone charging circuit.
- In a power bank circuit.
I hope all of you are clear about why we need a Dual Power Supply Circuit.We MATHA ELECTRONICS will be back soon with more interesting topics.