How to Use LS35-12: Examples, Pinouts, and Specs

The LS35-12 is a compact, low-profile switching power supply designed to deliver a stable 12V DC output with a maximum current of 2.9A. Its robust design includes built-in over-voltage and short-circuit protection, ensuring reliable operation and safeguarding connected devices. This power supply is ideal for powering LED strips, small motors, sensors, and other low-power electronic devices. Its compact size and high efficiency make it a popular choice for both hobbyist and professional applications.

• Powering LED strips and lighting systems
• Driving small DC motors
• Supplying power to sensors and microcontrollers
• General-purpose low-power DC applications

The LS35-12 has a simple terminal block for input and output connections. Below is the pin configuration:

1. Input Connection:

   • Connect the AC mains supply to the L (Live) and N (Neutral) terminals.
   • Ensure the FG (Frame Ground) terminal is connected to the earth ground for safety.

2. Output Connection:

   • Connect the load (e.g., LED strip, motor) to the V+ and V- terminals.
   • Ensure the load does not exceed the maximum output current of 2.9A.

3. Power On:

   • After verifying all connections, power on the AC mains supply.
   • The LS35-12 will provide a stable 12V DC output to the connected load.

• Load Requirements: Ensure the total load does not exceed 35W (12V x 2.9A). Overloading may trigger the protection features or damage the power supply.
• Ventilation: Install the LS35-12 in a well-ventilated area to prevent overheating.
• Safety: Always disconnect the power supply from the mains before making any wiring changes.
• Polarity: Double-check the polarity of the output connections to avoid damaging the connected devices.

The LS35-12 can be used to power an Arduino UNO via its DC barrel jack or VIN pin. Below is an example setup:

1. Connect the V+ terminal of the LS35-12 to the Arduino's VIN pin or DC barrel jack (center pin).
2. Connect the V- terminal of the LS35-12 to the Arduino's GND pin or barrel jack outer sleeve.

// This code blinks an LED connected to pin 13 of the Arduino UNO.
// Ensure the LS35-12 is properly connected to the Arduino's VIN and GND pins.

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
}

1. Can the LS35-12 be used with a 24V device?

   • No, the LS35-12 provides a fixed 12V output and is not suitable for 24V devices.

2. What happens if the load exceeds 2.9A?

   • The LS35-12 has built-in over-current protection. If the load exceeds 2.9A, the power supply will shut down to protect itself and the connected devices.

3. Is the LS35-12 suitable for outdoor use?

   • No, the LS35-12 is not weatherproof. It should be used in a dry, indoor environment.

4. Can I use the LS35-12 to charge a 12V battery?

   • The LS35-12 is not designed as a battery charger. Use a dedicated 12V battery charger for this purpose.

By following these guidelines and best practices, the LS35-12 can provide reliable and efficient power for a wide range of electronic applications.