1.2 - 15V/3A adjustable regulated power supply

-


Specifications

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


Schematic



Parts List


PCB


Popular posts from this blog

Overvoltage Protection for the LM317

-
Image
Description This is an add-on Over Voltage Circuit for the LM317 Regulator Circuit subhttp://www.blogger.com/img/blank.gifmitted by Matthew Hewson. The original circuit may be viewed here . Notes It is a voltage regulator that allows a 6v portable supply to be derived from the 12v car battery. You can add a 6.2V zener diode and a LED to warn you when the input supply is overvoltage. If you could find a relay that would operate from 6.2v right up to 12v that you could connect in such a way that if over voltage occurred, then the relay would automatically switch off the output preventing damage to any connected equipment. Such a relay would be quite difficult to find, so I designed this, it is a simple two transistor circuit which will switch off the output should the voltage raise above 6.2v (this can be changed by selecting a different value of zener diode ). Components are as follows: ZD1 =3D 6.2v Zener diode (you can change this to any value, the circuit will
Read more

Variable Voltage Regulator

-
Image
Notes controlling the output voltage from a regulator can be made variable in three ways:- 1. Using a fixed reference zener diode to increase the output by the value of the zener 2. A variable resistor for variable output, note that a voltage less than the nominal regulator is not possible 3. A chain of diode such as 1N4001, this increases the output by +0.7 V for every diode used.
Read more