App note from Coilcraft camparing two recognized power supply topologies. Link here (PDF) Beatles or Stones? Michael or LeBron? Deep dish or thin crust? Forward or flyback? These are just a few of the age-old questions that have been hotly debated over the years, people arguing their opinions with great vigor. But, the truth is, […]
This application note discusses key market trends and customer needs that are presenting new challenges for power supply design for after-market technologies and transport infrastructure automation. This piece will also examine solutions to address these challenges, with a special emphasis on power architecture. Link here After-market automotive products have driven remarkable innovation, from infotainment and […]
Teardown and repair of an GW Instek 1080W power supply from The Signal Path: In this episode Shahriar investigates the failure of a GW Instek 1080W power supply capable of providing up to 80V and 40A of programmable output voltage and current respectively. The power supply does not power on. However, relay noises can be […]
Anthony Lieuallen made this custom power supply and wrote a post on his blog detailing its assembly: You might not truly be an electronics nerd until you build your own power supply. Either way, I’ve finally passed that threshold. As I’ve mentioned previously (and previouslier), I’ve been working on mine — very slowly, off and […]
Kerry Wong did a teardown of an Agilent 66312A dynamic measurement DC source: Typically, a lab power supply can only operate within a single quadrant. Take a positive voltage power supply for example, it can only output or source current. If any attempt is made trying to sink current into the power supply by connecting […]
Mark Smith has a nice write-up on optimizing the 5v to 170v Nixie tube power supply: Since this power supply is just a fun design for an upcoming Nixie tube clock project of mine, I have the time to achieve ESE. While in Part 1 I described the equations and simulations, in this Part 2, I collected […]
Inrush current evaluation from Aimtec. Link here In AC/DC power converters beyond a few watts, during the initial application of power an excessive inrush current will flow when the input capacitors are suddenly charged. If unhindered the inrush current can easily exceed 50 A at the peak of the AC cycle and severely stress the […]
Designing a power supply for FPGA includes multiple voltage, ripple management and power sequencing, here’s an app note from Maxim Integrated. Link here (PDF) Field-programmable gate arrays (FPGAs) and complex programmable logic devices (CPLDs) require 3 to 15, or even more, voltage rails. The logic fabric is usually at the latest process technology node that […]
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 lowest possible ripple at fastest […]
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 are using slow components. However, […]
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 one can be controlled digitally […]
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 conditions can trigger unwanted protection […]
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 current meter as well as […]
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 need quite a high voltage […]
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 radio receivers. For this power […]
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 (400V) and 82µF (400V) electrolytic […]
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.