Summary of +/-12V Dual Power Supply
This article describes a symmetric ±12 VDC power supply designed for audio applications like pre-amplifiers and mixers. It features a 240 VAC input, a step-down transformer, onboard regulators for stable low-ripple output, and multiple connection options including screw terminals and Berg connectors.
Parts used in the Dual Power Supply Project:
- Mains supply input (240 VAC)
- Step Down Transformer (15-0-15V AC @ 350mA)
- Onboard regulator
- Dual output LED indication
- Screw terminal connector
- Berg connector
- Earth connection for chassis ground
Description
Symmetric +/-12 VDC power supply has been designed for audio applications, can power up microphone pre-amplifier, audio buffers, audio mixer, distributions amplifier, headphone amplifier, VU meter and few o other equipment or projects required dual supply.
Mains supply input 240 VAC
Step Down Transformer 15-0-15V AC @ 350mA.
Output +/- 12 VDC Dual, 350 mA
Regulated Low ripple DC output
Earth connection for chassis ground
Onboard regulator for stable supply
Dual output LED indication
Supply input & output via screw terminal connector
Dual unregulated output +/- 22 VDC via berg connector
More detail: +/-12V Dual Power Supply
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What is the primary purpose of this power supply?
It is designed for audio applications such as powering microphone pre-amplifiers, audio buffers, mixers, and headphone amplifiers. -
What is the mains supply input voltage required?
The device requires a 240 VAC mains supply input. -
What are the specifications of the step-down transformer?
The project uses a 15-0-15V AC transformer rated at 350mA. -
Does the supply provide regulated output?
Yes, it offers a regulated low ripple DC output with an onboard regulator for stability. -
How is the dual unregulated output connected?
The dual unregulated output of +/- 22 VDC is provided via a berg connector. -
What type of connectors are used for the main supply input and output?
Both the supply input and output use a screw terminal connector. -
Is there visual feedback for the power status?
Yes, the board includes dual output LED indication. -
How is the chassis grounded in this design?
An earth connection is provided specifically for the chassis ground.
