The LM350 power supply is a popular do-it-yourself (DIY) project among electronics enthusiasts. It is a versatile and adjustable voltage regulator that can provide a stable DC output voltage. This power supply design is based on the LM350 integrated circuit, which offers features like thermal shutdown, current limiting, and safe operating area protection. By building your own LM350 power supply, you can customize the output voltage according to your specific needs and gain a better understanding of power supply circuits.

Building your own power supply can be a rewarding and cost-effective project for any electronics enthusiast. The LM350 power supply is a popular choice due to its versatility and ease of use. In this step-by-step guide, we will walk you through the process of building your own LM350 power supply.

Before we begin, it is important to gather all the necessary components. You will need an LM350 voltage regulator, a transformer, a bridge rectifier, capacitors, resistors, and a heat sink. These components can be easily found at your local electronics store or online.

The first step is to connect the transformer to the bridge rectifier. The transformer will convert the AC voltage from your wall outlet to a lower AC voltage suitable for your power supply. The bridge rectifier will then convert the AC voltage to DC voltage. Make sure to follow the manufacturer's instructions for proper wiring.

Next, connect the output of the bridge rectifier to the input of the LM350 voltage regulator. The LM350 is a three-terminal device that can regulate the output voltage based on a reference voltage. It is capable of providing up to 3 amps of current, making it suitable for a wide range of applications.

To ensure stable output voltage, it is important to add capacitors to the input and output of the LM350. These capacitors will filter out any noise or fluctuations in the input voltage, providing a clean and stable output. The value of the capacitors will depend on your specific requirements, so refer to the LM350 datasheet for guidance.

Now it's time to connect the resistors to set the desired output voltage. The LM350 has an adjustable output voltage range of 1.2V to 33V. By connecting resistors in a voltage divider configuration, you can set the desired output voltage. Again, refer to the LM350 datasheet for the specific resistor values and calculations.

Once you have connected the resistors, it is important to test the output voltage. Use a multimeter to measure the voltage across the output terminals of the LM350. Adjust the resistors as necessary to achieve the desired output voltage. Be cautious not to exceed the maximum voltage and current ratings of the LM350.

Details

https://www.te1.com.br/2008/12/fonte-ajustavel-de-1-2-ate-33v-por-3-amperes-de-corrente-com-ci-lm350/

https://xtronic.org/circuit/adjustable-power-supply-lm350k/