Description

The Smart Lab Power Supply is a battery powered supply that can interact with a phone, tablet or a computer via Bluetooth or USB. The supply contains low power components such as a BLE chip CC2640R2F, an E-Paper display, efficient LDOs and switching converters to minimize quiescent consumption and maximize operational time. The power supply is meant to be used in areas where power is limited or inaccessible. In addition, there will be a solar panel to charge the batteries when used in remote areas.

The power comes from a rechargeable Lithium Ion pack. The battery voltage is boosted by a boost converter. The output of the boost converter is then connected to a regulated buck converter and an adjustable LDO to provide a variable voltage and current output. The output voltage and current are regulated via the CC2640 chip.

The power supply voltage and current can be set through the knobs on the front panel or through Bluetooth or USB.

Details

Why?

The reason behind the design of the portable power supply is simple: To provide access to a highly portable, variable power supply to engineers, students and hobbyists building and programming electronics in spaces where a typical power supply is difficult or impossible to use (remote areas, small labs, on-the-go programming, etc). With the addition of a highly accurate current measurement module and Bluetooth connectivity, users can monitor the power consumption of their devices while programming, debugging or during deployment in the field.

Features

0 - 12V regulated output voltage
0 - 2A current output with current limiting function
E-Paper Display
Current measurements down to micro Amps, maybe nano Amps
Bluetooth Connectivity
Sub 1-GHz connectivity (optional)
Fixed 5V USB output connection
Micro USB connector for serial output
Lithium Ion battery pack
Power supply connector (used for charging)

Hardware Design

Figure 1 - Simplified Circuit Diagram

Firmware

The firmware for this project will be uploaded and updated through GitHub https://github.com/James-Bonds/pps

Applications

Bench power supply
Power small electronics during prototype stages
Evaluate and monitor device consumption while programming firmware
Portable power supply for in-field testing and debugging
Power supply for outdoor designs
Remote monitoring of devices

Schematics

Figure 2 - Schematic v0.1

Files

pps_sch.pdf

First schematic files for the Portable Power Supply.

Adobe Portable Document Format - 705.04 kB - 04/12/2018 at 04:26

Preview

Project Logs

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Parts have arrived!

Vas • 04/18/2018 at 02:49 • 0 comments

Received the boards and parts a few days ago.

Time to assemble and test the initial design!

Schematics, Layout and BoM

Vas • 04/12/2018 at 04:28 • 0 comments

April 11th

Schematics, Layout and BoM completed one week ago. Boards and parts to arrive soon.

Discussions

Michael Walker wrote 11/12/2019 at 21:07

How did this project go? Any progress?

Are you sure? yes | no

Portable Power Supply