Portable power supply with adjustable voltage

Electronics / Power supplies

Added 8 comments

The master is engaged in various electronic projects. For convenience in their testing, the master made a small power supply with voltage regulation. Using a potentiometer, you can change the output voltage from 2 to 25 volts. Another goal was the possibility of using various tips with the device.

Tools and materials:
- 9V battery;
-Battery holder;

-Connecting wires;

-Connectors;
-Wire with clamps;
- Wires with probes;
-Plastic;
-Glue gun;
-Soldering iron;
-Nippers;
-Super glue;

Step One: Replacing the Potentiometer
The standard potentiometer of the voltage regulator is inconvenient in operation and the master solders it and replaces it with another.

Step Two: Add Connectors
Cut a piece of plastic. Sticks it to the battery holder. Drills the edges of the hole. Installs connectors.

Step Three: Installing the Indicator
The indicator sticks between the contacts. The indicator wires connect to the connectors.

Step Four: Install a Voltage Regulator
Adheres the regulator board to the bottom back of the battery holder. The wires of the holder are soldered to the input of the board, as in the photo (red - plus, black - minus).

Solder wires to the output of the board, red - plus, black - minus. The second ends are screwed to the connectors.

The power supply is ready. It remains to install the battery, connect the necessary wires and use as intended.

April 24, 2018 9:33 p.m. 0

Reply To quote A complaint

But the author did not write about this, but that he was inconvenient in work. But it is not intended for work.

April 24, 2018 2:25 p.m. 0

Well, it regulates the voltage, you can’t argue

April 23, 2018 23:51 0

About the switch, apparently got excited.((On the battery holder, if you look very closely, there is a power switch. It can be assumed that it is involved.

April 23, 2018 11:36 p.m. 0

Quote: boyfox

So it was necessary to install the board in the case.

Of course, given the fact that this is not a stationary unit, but a wearable unit. In addition, you need a power switch. And fixing the board with thermal nozzles is a bad decision.

April 23, 2018 9:03 p.m. 0

And for what purpose?

The trimmer is designed for a single parameter setting (of course, during operation it is possible to adjust if necessary, but the parameter is fixed), a variable resistor is designed for frequent rapid change of the parameter.

April 23, 2018 10:10 +1

So it was necessary to install the board in the case. And it looks strange, and I want to put something on it and shorten it.

April 23, 2018 10:06 0

And for what purpose? Does it seem to regulate the voltage?

April 22, 2018 2:44 p.m. 0

The standard potentiometer of the voltage regulator is inconvenient in operation

The regular trimmer is not inconvenient, but is intended for other purposes.

The second ends are screwed to the connectors.

Do not screw. ;)
A voltmeter below 4.5 V may not indicate voltage, and above 30 V, it may fail.
The design turned out to be so-so, but the module itself is a good one, anyone can read about it.

Portable power supply with adjustable voltage

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