Portable Power Supply

This project started when I realized I needed a portable power supply. Nothing special but just an adjustable voltage supply that would allow me to test things on the fly.

I decided to use some LM2596 modules as I had quite a few laying around. As I wanted two separate outputs I used 2 for this project.

All the parts i used for this project are listed in the description with the links to where I bought them.

For the 2 LM2596 modules the potentiometers where disoldered and replaced with 2 external ones.

The supply is designed to run on basically any battery (max voltage output is the voltage of the battery - 1.5V). In my case I used a 2 cell lipo battery and included a 3-pin port on the side to balance charge.

This is a small video of the final product: https://youtu.be/P5Va9ukvHRo

Parts list:

LM2596 X2 https://www.aliexpress.com/item/10-PCS-DC-DC-Step-Down-Converter-Module-LM2596-DC-4-0-40-to-1-3/1975111111.html?spm=2114.13010608.0.0.Pp5i9X

Potentiometer X2 https://www.aliexpress.com/item/10-PCS-High-Quality-WH148-B10K-Linear-Potentiometer-15mm-Shaft-With-Nuts-And-Washers-Hot/32379094457.html?spm=2114.01010208.3.10.HjdgHS&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10037_10054_10059_10032_10078_10079_10077_10073_10096_10070_10052_423_10050_10051,searchweb201603_6&btsid=20ab8239-0d3b-4646-b91d-d7a7f2c48617

LCD Voltage display X2 https://www.aliexpress.com/item/2-PCS-High-Quality-1pcs-Mini-Red-LED-Panel-Voltage-Meter-3-Digital-Adjustment-Voltmeter-hot/32671293288.html?spm=2114.01010208.3.2.jOMhf5&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10037_10054_10059_10032_10078_10079_10077_10073_10096_10070_10052_423_10050_10051,searchweb201603_6&btsid=627d6167-a593-43e8-83d0-7c6f78b75eb4

Banana Jack (2X red, 2X black) https://www.aliexpress.com/item/10-pairs-4mm-Banana-Jack-Terminal-Panel-Socket-Terminals-Test-Instrumentation-20pcs-lot-red-and-black/32264630414.html?spm=2114.13010608.0.0.3ayVJN

Female DC connector X1 https://www.aliexpress.com/item/20pcs-x-DC-Power-Outlet-Jack-Socket-5-5x2-1mm-Diameter-5-5mm-Inner-Pin-2/32599629702.html?spm=2114.01010208.3.2.HmJa54&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10037_10054_10059_10032_10078_10079_10077_10073_10096_10070_10052_423_10050_10051,searchweb201603_6&btsid=c480afa7-ab44-4360-adde-5a8b08658c84

Female pin header X3 pins https://www.aliexpress.com/item/Free-Shipping-80pcs-1x40-Pin-2-54mm-Single-Row-Female-Pin-Header-Connector/1066457655.html?spm=2114.01010208.3.2.xwlTqi&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10037_10054_10033_10059_10032_10078_10079_10077_10073_10096_10070_10052_423_10050_10051,searchweb201603_6&btsid=3a37033d-7033-4cf9-a672-8fad514512d1

Slide Switch X1 https://www.aliexpress.com/item/10pcs-6pin-DPDT-Slide-Switch-Miniature-125VAC-Mini-PCB-Latching-Train-Signal-12V-24V-6V-Slide/32692444364.html?spm=2114.01010208.3.84.qmTlUT&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10037_10054_10059_10032_10078_10079_10077_10073_10096_10070_10052_423_10050_10051,searchweb201603_6&btsid=6d7d56d2-9414-4b85-909e-465d6ec75473

Threaded inserts X8 https://www.aliexpress.com/item/High-Quality-100pcs-lot-Brass-Knurl-Nuts-M3-4mm-L-4mm-OD-Metric-Threaded-Nuts-Insert/32425232225.html?spm=2114.13010608.0.0.r8sj4W

M3 10mm Set Screw X4

M3 6mm Set Screw X4

Potentiometer Knob X2 https://www.aliexpress.com/item/10pcs-Potentiometer-Pot-Knobs-Caps-color-Sent-Randomly/32664879210.html?spm=2114.01010208.3.1.4YNKHO&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10084_10083_10080_10082_10081_10060_10061_10062_10056_10055_10037_10054_10059_10032_10078_10079_10077_10073_10096_10070_10052_423_10050_10051_424,searchweb201603_6&btsid=5f648013-064e-4615-b0ae-1899163cb29d

Battery X1 https://hobbyking.com/en_us/turnigy-nano-tech-1000mah-2s-25-50c-lipo-pack.html

Print Settings

Printer:

Cubicon Style

Rafts:

No

Supports:

Yes

Resolution:

0.1mm

Infill:

20%