Category Archives: power supply

Build Your Own Active Load

When it comes to testing power supplies, it’s useful to have a dummy load to put the gear through its paces. While it’s possible to just use some old heating elements or other big resistors, an active load can provide more control over the process. [Charles Ouweland] found himself in …read more

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Posted in Active Load, power supply, PSU testing, tool hacks | Leave a comment

Solving The Mysteries Of Grounding While Improving A Power Supply

Grounding problems and unwanted noise in electrical systems can often lead to insanity. It can seem like there’s no method to the madness when an electrical “gremlin” caused by one of these things pops its head out. When looking more closely, however, these issues have a way of becoming more …read more

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Posted in capacitance, electricity, filter, gremlin, Ground Loop, grounding, inductance, noise, oscilloscope, power supply, teardown | Leave a comment

Peek Inside These Same-But-Different Power Supplies

When [Kerry Wong] found an Amrel PPS 35-2 Programmable Power Supply from the late 90s on eBay, he recognized it as the single-channel version of another unit he owned, the dual-channel Amrel PPS-2322. Naturally, he purchased it and did a compare and contrast of the two models.

From the outside, …read more

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Posted in 35-2, Amrel, power supply, PPS, PPS-2322, retrocomputing, teardown, vintage | Leave a comment

USB Power Delivery For All The Things

The promise of USB Power Delivery (USB-PD) is that we’ll eventually be able to power all our gadgets, at least the ones that draw less than 100 watts anyway, with just one adapter. Considering most of us are the proud owners of a box filled with assorted AC/DC adapters in …read more

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Posted in i2c, parts, peripherals hacks, power supply, STUSB4500, USB C, USB-PD | Leave a comment

Atomic Pi Gets A 3D-Printed Mac Makeover

The Atomic Pi is a pretty impressive piece of kit for the price, but it’s not exactly a turn-key kind of product. Even to a greater extent than what you might normally expect with a “dev” board like this, the user is responsible for putting together the rest of the …read more

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Posted in 3D printed enclosure, Atomic Pi, Cheese Grater, computer hacks, mac pro, parts, power supply | Leave a comment

Adding Bluetooth Control To A Benchtop Power Supply

In 2019, it’s possible to kit out a lab with all the essentials at an even cheaper price than it has ever been. The DPS3005 is one such example of low-cost equipment – a variable power supply available for less than $50 with a good set of features. [Markel Robregado] …read more

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Posted in bluetooth, launchpad, power supply, ti launchpad, tool hacks | Leave a comment

A Breadboard Power Supply That’s More Universal Than Most

A favorite project of ours is the humble breadboard power supply. Yes, you can still prototype on breadboards, no, you don’t need an entire bench power supply to prototype on one, and every breadboard made in the last forty years has had the same pattern of holes. There’s plenty of …read more

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Posted in breadboard, MIC5225, power supply, tool hacks | Leave a comment

Nixie Power Supply Shows Ins and Out of Offshore Manufacturing

[Tony] built a high-efficiency power supply for Nixie tube projects. But that’s not what this post is about, really.

As you read through [Tony]’s extremely detailed post on Hackaday.io, you’ll be reading through an object lesson in electronic design that covers the entire process, from the initial concept – a …read more

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Posted in flyback, high voltage, manufacturing, misc hacks, nixie, offshore, offshoring, power supply, prototype, shenzhen, Tindie | Leave a comment

Well-Protected USB Power Strip Makes It Easy to Plug In

When we get a new device these days, somewhere in the package is likely to be a wall-wart USB power supply. We look for a place to plug in the little switch-mode dongle, rearrange a few plugs in the mains power strip, and curse its designers for the overly cozy …read more

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Posted in crowbar, e-fuse, misc hacks, polyfuse, power supply, switched-mode power supply, tool hacks, transient, usb | Leave a comment

Travelling The Oregon Trail With An Apple II Robot

For one reason or another, we’re going with a retro-futuristic 80s aesthetic in this case, [Mike] decided to turn an Apple IIe into a robot. If you have to ask why, you’ll never know, but this project does have some interesting things going for it. There’s a voice synthesizer, a brand spankin’ new power supply, and it rolls around on the floor thanks to Apple BASIC.

Since this is a mobile robot, there needs to be a power supply in there somewhere. The Apple II had a fantastic switching power supply, but it ran off mains voltage. To make this …read more

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Posted in apple II, basic, classic hacks, computer hacks, power supply, robot, robots hacks | Leave a comment