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.
This video by Robert Kollman, TI senior applications engineer, discusses how to use a two section filter for a low noise power supply.
Here is a video from Texas Instruments describing how to measure stability when testing power supplies.
Rwinscot is attempting a project-a-week. This week he shared his RickPAW 3.3volt/5volt power project in the forum: This breakout could be used in an automotive application where bare wires are soldered into place and the whole package wrapped in shrink tube. Or… you might want to put a barrel jack on it and use it […]
Dolabra put together this 5 volt solar power supply. The solar panel recharges a single alkaline battery which is then boosted to 5volts via an NCP1402 breakout board. Maximum output is 200 mA. I broke all the rules — I soldered directly to the battery and I’m recharging an alkaline. I’m surely going to be […]
Here is the Smoke Tester. It’s a board designed to safely power prototypes for the first time and see if there are shorts. Current can be measured using a voltmeter. Here’s the full feature list. 5V and 3.3v voltage regulators 7V-15V input 3 possible input sources: USB, 2mm DC barrel jack, and screw terminals 3 […]
Texas instruments released the Power Management reference design library. It’s filled with schematics, design notes, gerber files, and any technical document you might need to get over 300 reference designs up and running. Texas Instruments PowerLab™ Power Management Reference Design Library contains hundreds of reference designs for any application. Each reference design contains supporting technical […]
Dilshan designed an offline high voltage AC power supply primarily for SMPS testing. It outputs a square wave, so hooking it up to a mains-transformer based linear supplies is not a good idea, as the transformer will overheat. It’s open source hardware, so the schematics and design files are available. This is a high voltage, […]
Here is an app note from Linear Technology describing the use of virtual remote sensing of wiring voltage drops in power supply designs. Here, the LT4180 Virtual Remote Sense™ (VRS) IC alternates output current between 95% and 105% of the nominal required output current. The LT4180 forces the power supply to provide a DC current […]
Schazamp finalized his USB power supply. It features the MCP1824S linear voltage regulator, a PTC resettable fuse, and an ON-NONE-ON SPDT switch. You can chose the output from either the 5v USB line or the voltage regulator. Via the forum.
Today’s video is about our favorite Bus Pirate features. Voltage measurements with the Bus Pirate ADC pin are easier than working with a separate multimeter on an analog project. We read a voltage from an MCP4725 I2C digital to analog converter in the demo using the d and D (continuous) voltage measurement commands. The up/down […]
Schazamp designed a small USB power supply with a resettable PTC fuse, and a ‘fuse blown’ indicator LED. When the fuse is blown a P-MOS gate is pulled low, and it turns on a LED.
Jason has been working on a portable software defined transceiver design for the past year. Every day this week he’ll discuss a different part of the hardware in a series of guest posts. You can chat with the designer in the forum. Today’s post is about the power supply: It’s not as exciting (to me) […]
Here is a project built to provide a DC power supply with a GLCD interface: This power supply monitor is intended to measure the voltage and current of a DC power supply, and continuously display these values on a 128X64 pixel LED backlit GLCD display. Ezflyr built it for his aircraft ground power supply, but […]
Tautic Electronics has donated five dual output breadboard power supply to the Open 7400 Competition. Get your entry in and this and other cool hardware can be yours.
hak8or posted pictures of a power supply build using a 1U rack chassis: I saw a post about using magnetic fields on the human brain to get certain reactions, and the first thing that popped to my head was trying it out myself. …I finally came to the conclusion that I should make a proper […]
rsdio tipped us to an app note on power-supply sequencers and voltage trackers: here’s something for cloudform511’s Open Source Laptop, assuming it will need a fan The MAX34441, PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller Power supply/thermal manager provides unparalleled “black box” failure logging and energy efficient fan control Provides predictable operation of up […]