The DIY Variable DC Power Supply is a compact, adjustable voltage adapter designed for electronics projects, LED lighting, CCTV systems, and DIY applications. With an adjustable output voltage from 3V to 24V DC and a maximum current of 1A, this power supply provides flexible, reliable power for testing, prototyping, and powering devices that require specific voltages. The digital tube display and knob control make voltage adjustment intuitive and precise, while the included female header cables ensure easy connection to your project.
At the heart of the adapter is a high-efficiency switching power supply circuit that converts AC mains input to a stable, adjustable DC output. The output voltage is set via a rotary knob, with the digital tube display showing the current voltage setting in real time. This makes it easy to dial in the exact voltage you need without guessing or using a multimeter.
The 1A maximum output current provides ample power for:
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LED strips — Power 5V, 12V, or 24V LED strips (within current limits)
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CCTV cameras — Power 12V security cameras and DVRs
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DIY electronics — Prototype circuits requiring 3.3V, 5V, 9V, or 12V
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Arduino and microcontroller projects — Power boards and peripherals
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Audio equipment — Power small amplifiers and audio devices
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Network devices — Power routers, switches, and modems
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Testing and measurement — Bench power for circuit testing
The adapter features a standard DC barrel jack output (typically 5.5mm × 2.1mm) and includes female header cables for easy connection to your project. The LED indicator shows power status, and the compact, lightweight design makes it suitable for bench use, travel, and field applications.
The adapter includes built-in protection circuits including overcurrent protection, short-circuit protection, and over-temperature protection, ensuring safe and reliable operation.
Important Note: The 1A maximum output current is shared across all voltage settings. At higher voltages (e.g., 24V), the maximum current may be lower due to power limitations. Always verify the voltage and current requirements of your device before connecting. The output voltage should be set before connecting sensitive devices.
Whether you are powering an LED strip, testing a prototype circuit, or replacing a lost adapter, the DIY Variable DC Power Supply provides a flexible, reliable solution. It is suitable for individual makers, students, and businesses purchasing in bulk for product development or educational programs.
Features
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Adjustable output voltage — 3V to 24V DC via rotary knob
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Digital tube display — Real-time voltage readout for precise adjustment
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1A maximum output current — Ample for LED strips, CCTV, and DIY projects
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Knob control — Intuitive voltage adjustment without tools
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Standard DC barrel jack output — 5.5mm × 2.1mm (typical)
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Female header cables included — Ready to connect to your project
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LED power indicator — Visual power status feedback
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Built-in protection — Overcurrent, short-circuit, and over-temperature protection
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Compact and lightweight — Suitable for bench, travel, and field use
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Wide application range — LED strips, CCTV, Arduino, audio, network devices, testing
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Input Voltage | AC 100V – 240V (universal) |
| 2 | Output Voltage | 3V – 24V DC (adjustable via knob) |
| 3 | Maximum Output Current | 1A |
| 4 | Display | Digital tube voltage display |
| 5 | Output Connector | DC barrel jack (5.5mm × 2.1mm typical) |
| 6 | Included Cable | Female header cables |
| 7 | Protection | Overcurrent, short-circuit, over-temperature |
| 8 | Application | LED strips, CCTV, Arduino, DIY projects |
