The SMPS 12V 30A is a Switch Mode Power Supply designed to efficiently convert AC mains voltage into a stable DC output of 12 volts, with a maximum current capacity of 30 amps. This component is widely used in applications requiring high current and stable voltage, such as powering LED strips, CCTV systems, 3D printers, and industrial equipment. Its compact design, high efficiency, and robust performance make it a reliable choice for both hobbyist and professional projects.
This circuit is designed to convert 240V AC power to both 12V and 24V DC outputs using multiple SMPS units. Terminal blocks are used to organize and distribute the power, while a 120V outlet provides additional AC power access. The circuit is likely used for powering various electronic devices that require different voltage levels.
Open Project in Cirkit Designer
This circuit is designed to provide an uninterruptible power supply (UPS) system with a 12V DC output. It includes a 12V 5A power supply connected to an AC source through a toggle switch, which charges a pair of 18650 Li-ion batteries via a voltage regulator (XL4016). The UPS module ensures a continuous power supply to the load by switching between the power supply and the battery bank.
Open Project in Cirkit Designer
This circuit is a battery management and charging system for a 2S lithium-ion battery pack, which powers multiple MG996R servos. The TP5100 module charges the battery pack from a 12V power supply, while the 2S 30A BMS ensures safe operation and distribution of power to the servos.
Open Project in Cirkit Designer
This circuit includes a 12V 200Ah battery that powers a water pump and two DC motors, each controlled by a separate 12v~40v 10A PWM DC motor speed controller. A rocker switch (SPST) is used to control the power flow to the water pump and a pilot lamp indicates when the pump is powered. The DC motors' speed can be adjusted by the PWM controllers, and wire connectors are used to organize the connections between components.
Open Project in Cirkit DesignerThe following table outlines the key technical details of the SMPS 12V 30A:
| Parameter | Specification |
|---|---|
| Input Voltage Range | 110V AC - 220V AC (±15%) |
| Output Voltage | 12V DC |
| Maximum Output Current | 30A |
| Output Power | 360W |
| Efficiency | ≥85% |
| Frequency Range | 47Hz - 63Hz |
| Operating Temperature | -10°C to +60°C |
| Cooling Method | Built-in fan (active cooling) |
| Protection Features | Overload, Overvoltage, Short Circuit |
The SMPS 12V 30A typically has the following input and output terminals:
| Pin | Label | Description |
|---|---|---|
| 1 | L | Live wire (AC input) |
| 2 | N | Neutral wire (AC input) |
| 3 | GND | Ground (Earth connection) |
| Pin | Label | Description |
|---|---|---|
| 1 | V+ | Positive DC output (12V) |
| 2 | V+ | Positive DC output (12V) |
| 3 | V- | Negative DC output (Ground) |
| 4 | V- | Negative DC output (Ground) |
Input Connection:
L (Live) and N (Neutral) terminals.GND terminal for safety.Output Connection:
V+ and V- terminals.Adjusting Output Voltage:
Power On:
The SMPS 12V 30A can be used to power an Arduino UNO and other peripherals. Below is an example circuit and code:
V+ terminal of the SMPS to the VIN pin of the Arduino UNO.V- terminal of the SMPS to the GND pin of the Arduino UNO.// Example code to blink an LED connected to pin 13 of the Arduino UNO
// Ensure the Arduino is powered by the SMPS 12V 30A via the VIN pin.
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
}
No Output Voltage:
Overheating:
Output Voltage Fluctuations:
Fan Not Working:
Q: Can I use this SMPS to charge a 12V battery?
Q: Is the SMPS waterproof?
Q: Can I adjust the output voltage to 13.8V for specific applications?
Q: What happens if I connect a load exceeding 30A?