Tag Archives: Power supply

Keysight Technologies’ E36300 series bench power supplies

Martin Rowe @ edn.com presents the new Keysight E36300 bench power supply with triple output and some great features.

Keysight Technologies’ E36300 series of bench power supplies provide three outputs with power of 80 W or 160 W with line/load regulation of 0.01%. Front-panel buttons let you turn any output on or off and you can configure each output with 2-wire local sensing or 4-wire remote sensing. The 4-wire sensing removes losses caused by IR drops in your power-delivery wires.

Keysight Technologies’ E36300 series bench power supplies – [Link]

Linear Lab Power Supply with digital meter

@ instructables.com build a nice power supply for his lab. He writes:

From my point of view one of the best ways to get started in electronics is to build your own laboratory power supply. In this instructable I have tried to collect all the necessary steps so that anyone can construct his own.

All the parts of the assembly are directly orderable in digikey, ebay, amazon or aliexpress except the meter circuit. I made a custom meter circuit shield for Arduino able to measure up to 36V – 4A, with a resolution of 10mV – 1mA that can be used for other projects also.

Linear Lab Power Supply with digital meter – [Link]

Digital Battery Operated Powersupply

ThomasVDD @ instructables.com writes:

A while back I built a powersupply from an old ATX PSU, and while it works great, I wanted to step up my game with a digital powersupply. As already said, it is powered by batteries (2 lithium cells to be precise), and it can deliver a maximum of 20 V at 1 A; which is plenty for most of my projects that require a precise powersupply.

Digital Battery Operated Powersupply – [Link]

400V – 5A Power Supply For Brushless Motor Drivers

Although the power supply design is specific to the Brushless Servo Drivers mainly for IPM Modules, the concepts and circuit design may be used for any power supply requires high voltage output up to 400V DC and 5 Amps. The power supply is an unregulated design with an option to allow connection to either 120V or 230V mains and also it can work with lower voltage for audio amplifiers by increasing capacitor value. The design uses fully integrated bridge rectifier, and multiple bus capacitors for low ripple, noise suppression, and provides high current reservoirs. Additionally the dc supply line have bleeder resistor R2 and R3 to drain the large reservoir capacitors PCB, mounted fuse holder provided  for short circuit and over current protections, low ohm NTC used for inrush current at power start up,  C1, C12, TX protects  against turn on/off spikes and EMI noise reduction. This power supply can be used to drive Tesla Coils, Induction heaters, DC Motor drivers, Brushless DC motor driver.

400V – 5A Power Supply For Brushless Motor Drivers – [Link]

Reference design – USB Type-C charger delivers 18W

Graham Prophet @ eedesignnewseurope.com discuss about a 18W USB power supply reference design.

This joint reference design describes an 18W, USB PD compliant, AC-DC power converter. The design, titled DER-567, pairs the WT6630P USB Type-C PD controller from Weltrend with Power Integrations’ InnoSwitch-CP off-line CV/CC flyback switcher IC, to produce a compact and highly energy-efficient standards-compliant power adapter, that PI says will deliver faster charge times for the larger batteries required to power next-generation mobile devices.

Reference design – USB Type-C charger delivers 18W – [Link]

-5V @100mA Switched Capacitor Converter

The circuit diagram presented here is about a negative voltage regulator. It is based on LT1054, which is a switched capacitor voltage converter with regulator from Texas instrument. This device has many advantages over other previously available switched capacitor voltage converters. It provides higher current and has lower voltage losses.


  • Input Voltage: 3.5VDC to 15VDC
  • Output Voltage: -5VDC
  • Output load: 100mA
  • PCB: 60mm X 20mm

-5V @100mA Switched Capacitor Converter – [Link]

snapVCC – A snap-on regulated 3.3 V/5 V power supply

by Mahesh Venkitachalam @ hackaday.io:

I use 9 V batteries for a prototyping a lot of my electronics projects. I was inspired by the Sparkfun breadboard power supply board, and wanted to create something similar, but with a more convenient form factor for use with a 9V battery. The design I came up with, is a tiny snap-on PCB with the regulator components on one side, and 9V battery contacts on the other. The idea is that the power supply will become part of the battery.

snapVCC – A snap-on regulated 3.3 V/5 V power supply – [Link]

12V @ 120mA Transformerless Power Supply

The circuit provided here is a transformer-less non-isolated power supply which is capable of delivering an output of 12V at 120mA current for an input voltage varying from 85VAC-265VAC. The LNK304 is the heart of this circuit which supports buck boost and flyback topologies. This project is low in cost and simple when compared other tramsformer-less power supplies.


  • Input(V): 85V AC to 265V AC
  • Output(V): 12V DC
  • Output load: 120mA
  • PCB:75mm X 35mm

12V @ 120mA Transformerless Power Supply – [Link]

EEZ H24005, Two-Channel Programmable Power Supply

Envox Experimental Zone (EEZ) is an open hardware and open source development website, that creates and shares various open source hardware and software projects using as much as possible open-source tools and technologies.

One of their projects is the programmable bench power supply ‘EEZ H24005’. The goal is to make a reliable, modular, open and programmable power supply, that can be used for various tasks starting with powering breadboard, charge batteries of various types, or to be used as an educational tool and science experiments.

The EEZ H24005 is a DIY power supply unit consists of four PCBs and SMT electronics components except some power resistor, AC/DC adapter, and power regulators. Only two ICs need hot air soldering station to mount, while the remaining parts can be simply mounted with soldering iron.

Top Faces Of The Four PCBs
Bottom Faces Of The Four PCBs

To build this PSU you will need these tools:

In addition to modularity, programmability, openness, and DIY, reliability was one of the key features and design guidelines of the designing process. Because as a sourcing device, the PSU has to be designed in the way that no dangerous oscillation in voltage or current is present over the long period of deployment. That includes border case of turning the PSU on and off, applying or disconnecting load, etc.

Here is some of the main features of H24005:

  • Modular design that allows combining modules with various performance and capability and creation of multiple output solution
  • Voltage regulation (CV), 10 mV resolution
  • Current regulation (CC), 10 mA initial resolution
  • Various current single range operation (0-5 A default, 0-3 A or 0-4 A per channel)
  • 15-bit data acquisition resolution
  • Real-time clock (RTC) with supercap/battery backup
  • SD-card as an additional storage
  • Ethernet support for remote control
  • Simple DC output protection (reverse voltage, over-voltage)
H24005 PSU Block Diagram

Since it is an open source project, all files, designs, source codes are available at the Github repository. Also a detailed building guide is available at the official website. But if you want to get H24005 but not interested in making it, you can order yours through OSHPark. There is also a CrowdSupply campagin on going.

PSU Burner – a power supply tester

Bob @ electrobob.com tipped us with his latest project. It’s about a power supply tester.

What does one do when designing a power supply? Well, build a power supply tester, of course. One of the simplest things to build is a constant current load. This will allow for testing of the endurance of the power supply, as most of the designs out there are using slow components.

However, I wanted to make a better one: one that I could hook up to my Analog Discovery and generate a test waveform to be able to connect and disconnect the load fast. This is a weekend project, so all parts are not the best for the purpose, just what I had around.

PSU Burner – a power supply tester – [Link]