How to Use Ali AC-24VDC 70W 3A Power Supply: Examples, Pinouts, and Specs

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Introduction

The Ali AC-24VDC 70W 3A Power Supply (Manufacturer Part ID: WX-DC2407) is a reliable and efficient power supply unit designed to convert alternating current (AC) to direct current (DC) at a stable output of 24 volts. Manufactured by Shenzhen Smart Electronics Co., Ltd, this power supply is capable of delivering up to 70 watts of power with a maximum current of 3 amps. It is ideal for powering a wide range of electronic devices, including industrial equipment, LED lighting systems, and DIY electronics projects.

Explore Projects Built with Ali AC-24VDC 70W 3A Power Supply

AC to DC Power Supply with 7-Segment Voltage Display

This circuit is a regulated power supply that converts 220V AC to a lower, stable DC voltage. It includes a step-down transformer, bridge rectifier, voltage regulator, and filtering capacitors. A 7-segment display indicates the output voltage, which can be adjusted using a potentiometer.

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AC to DC Power Supply with Voltage Regulation and LED Indicator

This circuit is a basic AC to DC power supply with voltage regulation. It includes a transformer to step down the AC voltage, a bridge rectifier made of 1N4007 diodes to convert AC to DC, an electrolytic capacitor for smoothing, and a voltage regulator to provide a stable DC output. An LED with a current-limiting resistor indicates the presence of the output voltage.

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Adjustable Voltage Power Supply with LM317 and Digital Voltmeter Display

This is a variable DC power supply circuit that converts AC to a regulated DC output. It uses a transformer for stepping down the voltage, a bridge rectifier for converting AC to DC, and an LM317 voltage regulator with a potentiometer for adjustable output voltage. The circuit includes a voltmeter for displaying the output voltage and an LED as a power indicator.

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AC to DC Power Supply with Built-In Volt/Ammeter

This circuit appears to be a power supply unit that converts AC voltage to a rectified DC output. It uses a power transformer to step down the AC voltage, which is then rectified by a bridge rectifier composed of four diodes. An electrolytic capacitor is used for smoothing the rectified output, and a mini digital volt/ammeter is included to monitor the voltage and current. The circuit also includes a rocker switch for power control, an AC power plug as the input, and a DC female jack and BNC connectors as outputs.

Open Project in Cirkit Designer

Common Applications and Use Cases

Powering industrial control systems and automation equipment.
Supplying power to LED strips, panels, and other lighting systems.
Providing a stable DC voltage for DIY electronics and prototyping.
Operating small motors, actuators, and other electromechanical devices.
Serving as a power source for Arduino, Raspberry Pi, and other microcontroller-based projects.

Technical Specifications

Key Technical Details

Parameter	Specification
Input Voltage Range	100-240V AC, 50/60Hz
Output Voltage	24V DC
Maximum Output Current	3A
Maximum Output Power	70W
Efficiency	≥85%
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +85°C
Dimensions	110mm x 78mm x 36mm
Weight	Approximately 300g
Safety Features	Overload, overvoltage, and short-circuit protection

Pin Configuration and Descriptions

The power supply has clearly labeled input and output terminals for easy connection. Below is the pin configuration:

Terminal Label	Description
L	Live wire input (AC input)
N	Neutral wire input (AC input)
GND	Ground connection (optional for safety)
+V	Positive DC output (24V)
-V	Negative DC output (0V)

Usage Instructions

How to Use the Component in a Circuit

Input Connection:
- Connect the L terminal to the live wire of the AC mains supply.
- Connect the N terminal to the neutral wire of the AC mains supply.
- Optionally, connect the GND terminal to the earth ground for safety.
Output Connection:
- Connect the +V terminal to the positive input of your load or circuit.
- Connect the -V terminal to the negative input of your load or circuit.
Power On:
- Ensure all connections are secure and insulated.
- Plug the power supply into the AC mains and switch it on.
Load Considerations:
- Ensure the total power consumption of the connected load does not exceed 70W.
- Avoid short circuits or reverse polarity connections to prevent damage.

Important Considerations and Best Practices

Ventilation: Ensure adequate airflow around the power supply to prevent overheating.
Mounting: Secure the power supply in a stable position to avoid vibrations or accidental disconnections.
Safety: Always disconnect the power supply from the mains before making any wiring changes.
Testing: Use a multimeter to verify the output voltage before connecting sensitive devices.
Arduino Compatibility: This power supply can be used to power Arduino boards via the VIN pin or an external voltage regulator.

Example: Using with Arduino UNO

To power an Arduino UNO with this power supply, follow these steps:

Connect the +V terminal of the power supply to the VIN pin of the Arduino.
Connect the -V terminal of the power supply to the GND pin of the Arduino.
Ensure the output voltage is set to 24V DC.

Here is an example Arduino sketch to blink an LED while powered by the Ali AC-24VDC 70W 3A Power Supply:

// Blink an LED connected to pin 13 of the Arduino UNO
// Ensure the Arduino is powered via the VIN pin with 24V DC

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

Troubleshooting and FAQs

Common Issues and Solutions

Issue	Possible Cause	Solution
No output voltage	Incorrect wiring or loose connections	Verify all connections and wiring.
Overheating	Insufficient ventilation	Ensure proper airflow around the unit.
Output voltage fluctuates	Overloaded power supply	Reduce the load to within 70W limit.
Device not powering on	Faulty input voltage or fuse blown	Check input voltage and replace the fuse.
Short circuit protection triggered	Output terminals shorted	Disconnect and inspect the output wiring.

FAQs

Can this power supply be used outdoors?
- No, this power supply is not waterproof and should only be used in dry, indoor environments.
What happens if the load exceeds 70W?
- The power supply's overload protection will activate, shutting down the output to prevent damage.
Can I adjust the output voltage?
- No, the output voltage is fixed at 24V DC and cannot be adjusted.
Is it safe to leave the power supply on continuously?
- Yes, as long as the power supply is operating within its specified limits and has adequate ventilation.
Can I use this power supply to charge batteries?
- This power supply is not designed for direct battery charging. Use a dedicated battery charger for this purpose.

This concludes the documentation for the Ali AC-24VDC 70W 3A Power Supply. For further assistance, please contact Shenzhen Smart Electronics Co., Ltd or refer to the product manual.