1.2 - 15V/3A variable and regulated PS

This kit provides a variable output power supply ranging from 1.2 to 15 V @ 3 A. It uses Low Dropout Positive Regulator LM1084 in TO220 package for delivering variable output voltage. Input - 18 VAC/DC. Output - variable output from 1.2 ~ 15 V @ 3 A Regulated low ripple DC voltage. Heatsink for regulator IC. On board bridge rectifier to convert AC to DC. LED indication at input of IC. Zener trimmed band gap reference, current limiting and thermal shutdown (provided by IC feature). Power Battery Terminal (PBT) for easy input and output connection. Onboard PCB mounted Potentiometer (POT) for varying the output voltage. Filter capacitors for low ripple DC output. Four mounting holes of 3.2 mm each. PCB dimensions 46 mm x 58 mm.

The variable output power supply kit described operates within a voltage range of 1.2 to 15 V and can deliver a maximum current of 3 A. The core component of this circuit is the LM1084 Low Dropout Regulator (LDO), which is housed in a TO220 package, allowing for efficient thermal management through the use of an attached heatsink.

The power supply accepts an input voltage of 18 VAC or DC, which is first processed by an onboard bridge rectifier that converts the alternating current (AC) to direct current (DC). This conversion is critical for the operation of the LM1084, which requires a stable DC input to function effectively.

To ensure a stable output voltage with minimal ripple, filter capacitors are integrated into the design. These capacitors smooth out fluctuations in the output, providing a clean DC voltage suitable for various applications. The output voltage can be adjusted using a PCB-mounted potentiometer, allowing users to set the voltage to their specific requirements within the 1.2 to 15 V range.

Additional features include an LED indicator that signals the presence of voltage at the input of the LM1084, providing visual feedback for troubleshooting and operation verification. The circuit also incorporates a zener-trimmed band gap reference, which enhances the precision of the output voltage. Furthermore, the LM1084 includes built-in current limiting and thermal shutdown capabilities, enhancing the safety and reliability of the power supply.

The design includes four mounting holes with a diameter of 3.2 mm, facilitating secure installation in various enclosures or setups. The overall dimensions of the printed circuit board (PCB) are 46 mm by 58 mm, making it compact enough for integration into different projects while maintaining a user-friendly layout for connections via the Power Battery Terminal (PBT). This combination of features makes the kit versatile for powering electronic devices that require adjustable voltage and current.This kit provides a variable output power supply ranging from 1.2 to 15 V @ 3 A. It uses Low Dropout Positive Regulator LM1084 in TO220 package for delivering variable output voltage. Input - 18 VAC/DC. Output - variable output from 1.2 ~ 15 V @ 3 A Regulated low ripple DC voltage. Heatsink for regulator IC. On board bridge rectifier to convert AC to DC. LED indication at input of IC. Zener trimmed band gap reference, current limiting and thermal shutdown (provided by IC feature). Power Battery Terminal (PBT) for easy input and output connection. Onboard PCB mounted Potentiometer (POT) for varying the output voltage. Filter capacitors for low ripple DC output. Four mounting holes of 3.2 mm each. PCB dimensions 46 mm x 58 mm 🔗 External reference