Lab supply progress - Rectifier board redesign

I've finally made some progress with the power supply. After re-spinning a board and twice setting my diodes on fire, I now have a working first stage.

In the video below I give you a quick run through of my work and also show the inrush current limiting board and the regulator stage.

As I've mentioned before, this power supply will also be modular, but not only in the sense that each stage will be a separate board, but even at the board level parts are optional. This allows for you to build a bare bones analogue PSU through to a fully connected lab grade power supply.

Leave comments below. :-)

Lab Power Supply: OpAmps, Analogue Control and Digital Monitoring

I've progressed to the point where I think the second stage of the Lab Power supply is probably ready for an initial board to be made.

In this video I go through the OpAmp design, the digital monitoring, Linear control and the design of the shunt resistors in the second of three main boards in the system.

Might be time to have at least the Raw Power board manufactured so that I can progress to a stage where I can start testing the design of the second stage.

0-30V 0-3A Variable Bench/Lab PSU

I have started work on a Bench/Lab power supply design.

The following are Required features:

• 0-30V variable output voltage
• 0-3A Current Limited
• Current Limit notification (by LED)
• Output Enable button with notification LED
• Display set and actual output voltage and current.
• Static 5V output
• Static 3.3V output
• Display current flow of 5V and 3.3V circuits.
• USB Charge port
• USB PC connection port
• PC controlled via USB
• Internal Temperature sensor and PWM fan for quite operation.

Optional features

• LAN Connection to connect multiple PSU's together for Parallel or Serial use or Synchronised outputs
• Mode switch & LED for extended user interface controls

Design Requirements

• PSU Should be fully modular to allow for expansion or alternative uses or replacement of required modules with alternatives as required.
• PSU should be as efficient as possible
• PSU should be as cost effective as possible
• PSU should be as small as possible
• PSU should be as quiet as possible

Gineer - Variable Bench PSU #1  

 

Gineer - Variable Bench PSU #2 Raw Power