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 mode, the load will sink […]
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.
@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.
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 teardown and calibration.
@LuisMirandaAceb tweeted, “I started only with ATX PS and your breakout board but finally this is what I ended with… ”
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 of this kit which I […]
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 supply,the meter will display PUSH […]
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 can get similar Ammeters on […]
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.
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, testing of insulating materials…) this […]
ntractiv posted pictures of his Eurorack power supply from Dirty PCBs. Via Flickr.
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 2-pin header and cut the […]
A simple current-limiting power supply from Micrel, app note here. Just three ICs are required to build this adjustable-voltage, adjustable-current-limit power supply that operates like a laboratory supply. It offers an output voltage range of 0V to 25V and a current limit range of about 10mA to 1.5A. The Micrel MIC29152 LDO Regulator has a […]
NsN has been working on a power bar, a small breadboard power supply: The power bar is a small breadboard friendly power supply with three independent voltage regulators and built-in current monitoring. The target applications are small, mostly digital projects, which don’t need a large 0-30V, 6A benchtop power supply, but at the same time want […]
Kerry Wong writes: A couple of weeks ago I did a teardown of HP 6181C — a precision DC current source made in the late 70′s and early 80′s. This time around, I am going to show some pictures of an HP 6113A precision DC power supply and do a basic calibration using my Keithley […]
Kerry D. Wong writes: Power supply is one of those things one can never have too many of. I have quite a few already, and my favorite one so far is the Topward 6603A. This dual 60V/3A tracking power supply satisfies most of my needs. I have since added an automatic fan controller, digital voltage […]
Nick Carter blogged about his DIY bench power supply with the ATX breakout board: There are tons of such projects out there on the internet but most involve hacking open the power supply and I didn’t think that was the way to go. I considered getting a cheap ATX adapter from Monoprice and breaking out […]
Debraj built an electrical dummy load to test his power supply and wrote a post on his site detailing it’s assembly: Recently, I purchased a power supply that claimed a max current of 2A and 0~15V. So I wanted to test it. I had a 36 watts bulb (used in motor cycles), but that was too […]
This application note outlines the performance of PWM margining when the MAX34451 is connected to the MAX15041 evaluation (EV) kit: Pulse-width modulation (PWM) margining is a simple technique to adjust the output voltage of power supplies. This application note discusses the effect of PWM on the power-supply output-voltage noise, the enabling and disabling of PWM, […]
TI senior applications engineer, Robert Kollman discusses how quasi-resonance increases efficiency in switch mode power supplies for wall adapters.