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Posts Tagged ‘power supply’

PRECIsion Power SUpply project

Friday, August 18th, 2017

PreciPSU, a high performance power supply project from Mare & Gal Electronics: PreciPSU is an attempt to build high performance power supply. The idea started few years ago but it was never realised. Some major target performance specs are as follows: three isolated channels around 50W per channel 24V/3A output per channel...

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PSU burner

Tuesday, January 31st, 2017

Bob writes: 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...

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Bertan/Spellman 225-20R HV power supply teardown

Friday, December 2nd, 2016

Kerry Wong did a teardown of a Bertan 225-20R 20kV high voltage power supply: I just picked up another high voltage power supply, this time it is a working Bertan/Spellman 225-20R 20kV one. Unlike the Bertan 205A-05R that I did a teardown with last time which was entirely analog, this...

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App note: Limiting inrush current

Sunday, July 3rd, 2016

Aimtec's app note on inrush current on power converters and their solution. Link here Inrush currents can be problematic in circuits that utilize overload protection devices such as fuses and circuit breakers. The selection of overcurrent protection devices is made more complicated when high inrush currents are present. False overload...

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DIY Powerpole voltage and current meters

Friday, June 17th, 2016

Sverre Holm made his own powerpole voltage and current meters: Powerpole voltage and current monitoring is quite nice to have. One can buy commercial meters, but due to the availability of nice and cheap modules, it is very easy to make them oneself. To the right you'll see my combined voltage and...

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High voltage power supply for Nixie tubes

Friday, April 8th, 2016

Limpkin has published a new build: a high voltage power supply for Nixie tubes For quite a while I've had this project idea in the back of my head that would involve using many Nixie tubes. These funny looking cold cathode displays were actually introduced during the 1950s and unfortunately...

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Low voltage power supply unit

Thursday, March 24th, 2016

Dilshan Jayakody writes: In this post we introduce simple and flexible, regulated low voltage power supply unit. This power supply has provision for 4 outputs such as 1.5V, 1.8V, 2.5V and 3.3V. We mainly build this low voltage power supply unit to test (and power-up) low voltage MCUs, CPLDs and...

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Mullard 3-3 Amplifier project (part 2)

Tuesday, February 23rd, 2016

Dilshan Jayakody writes: This is a second article related to Mullard 3-3 Amplifier Project and in this article we introduce HT transformer and HT power supply related to this amplifier. As mentioned in previous post, power supply unit of this tube amplifier is constructed using 400V 5A bridge rectifier, 220µF...

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App note: Start-up test using electronic load

Sunday, December 6th, 2015

An app note from Alpha and Omega Semiconductor on importance of start-up power behavior to diagnose and prevent unwanted inrush current. Link here (PDF) Electronic loads, such as Chroma 6310 series, can be configured as constant current (CC) mode, constant voltage (CV) mode and constant resistance (CR) mode. In CC...

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App note: Eliminate noise through proper supply bypass filtering

Sunday, July 12th, 2015

Power supply filtering, an application note from Maxim Integrated. Link here If sensitive analog systems are run from one supply without the sufficient bypassing to eliminate noise, undesired degradation in a system's performance will result. This application note provides insight into suitable techniques to overcome this roadblock.

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ATX Bench power supply

Tuesday, June 2nd, 2015

@arbitraryuser tweeted picture of his desktop power supply: ATX breakout board fitted. Shortened and resoldered all the lines. Beautiful Desktop Power Supply! You can get one for $14 at Seeed Studio.

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HP Agilent E3611A power supply teardown and calibration

Wednesday, May 6th, 2015

Florin of YourITronics did a teardown and calibration of a HP Agilent E3611A power supply: I got this HP Agilent E3611A from Ebay. It was marked as not working and I was planing a repair video on it. Unfortunately the unit turned out to be fully functional so I only did a...

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DIY ATX Bench power supply

Monday, April 20th, 2015

@LuisMirandaAceb tweeted, "I started only with ATX PS and your breakout board but finally this is what I ended with... "  

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Posted in ATX BB, power supply | 7 Comments »

Kit assembly 0-30V 0-3A adjustable linear power supply

Thursday, March 19th, 2015

Florin of YourITronics writes, "In this video I am assembling a 0-30V 0-3A Adjustable Linear Power Supply kit. Will it work at first power on? Or will Murphy get me this time? Watch the video and see how I got myself into trouble. I also reverse engineered and got a schematic...

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Gophert CPS-3205C calibration

Monday, March 2nd, 2015

Florin of YourITronics writes: In this video I am calibrating the Gophert CPS-3205C power supply using my Keithley 175 4.5 digit multimeter and my adjustable dummy load. The calibration procedure is: 1. Set the V/A selector switch to A position, 2. Push the adjust knob then power on the power...

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DIY PSU console

Friday, January 23rd, 2015

Simon wrote a post on his blog detailing his DIY PSU console assembly: If I was going to build a power supply display add on, I decided to add some current limiting to it as well - but it had to be simple, cheap, and work with the panel meters. Yes you...

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App note: Power-supply solutions for Xilinx FPGAs

Sunday, October 19th, 2014

MAXIM's power solution for Xilinx' FPGAs. App note here (PDF!) Field-programmable gate arrays (FPGAs) are used in a wide variety of applications and end markets, including digital signal processing, medical imaging, and high-performance computing. This application note outlines the issues related to powering FPGAs.  

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Mini high voltage power supply

Monday, October 13th, 2014

Victor8o5 posted detailed instructions of how to make this high voltage power supply. He writes: WARNING: Before you start making anything please take a moment and read this: This circuit is intended to be used for educational and experimental purposes (electrostatic experiences, franklin bell experiment, plasma generation, gas ionization, electronic igniter,...

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Eurorack power supply from Dirty PCBs

Tuesday, July 22nd, 2014

ntractiv posted pictures of his Eurorack power supply from Dirty PCBs. Via Flickr.    

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5v/3.3v power supply PCB

Wednesday, June 18th, 2014

MickM has been working on creating a power supply: Here is a simple but versatile power supply board. It uses either a TO-220 7805 or a TO-92 78L05 (or other voltages). Power LED is optional, and can be on-board or remote with a header. Power switch is optional, install a...

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  • Cyk: Well, this is an application that I'd solve with an Android smartphone. Used Moto G phones can be found on Ebay for ~€30, and thanks...
  • Noy: Yuuup
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  • KH: I guess this is a failed attempt at making a pass/fail cable tester out of discrete ICs. A single pass/fail LED is not that useful....
  • Max: Considering it only seems to test that all wires conduct, I'm not sure what exactly does this show you that 7 LEDs each powered through...