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Author Archives: Matt Varian

2026 Green Powered Challenge: SolMate Charges On the Move

Posted on April 17, 2026 by Matt Varian
SolMate Charger

We’ve all had those times when your electrical device of choice is running low on battery. Sometimes you even plan ahead and are also carrying a battery pack, but what …read more Continue reading 2026 Green Powered Challenge: SolMate Charges On the Move→

Posted in 2026 Green-Powered Challenge, battery bank, contests, green hacks, IP5306, solar hacks, solar panel

Pocket-Sized e-Ink Gets a Firmware Upgrade

Posted on April 6, 2026 by Matt Varian
Open-Source eink firmware

Not so long ago, e-ink devices were rare and fairly pricey. As they have become more common and cheaper, some cool form-factor devices have emerged that suffer from subpar software. …read more Continue reading Pocket-Sized e-Ink Gets a Firmware Upgrade→

Posted in custom firmware, eink, Firmware, handhelds hacks | Tagged E-reader

Tiny Moves, Big Depth: An Open-Source Macro Focus Slider

Posted on April 5, 2026 by Matt Varian
macro photo slider

When taking macro photographs, you often need just a tiny bit of controlled motion — so little that it’s tough to pull off by hand. To address this, [Salveo] designed …read more Continue reading Tiny Moves, Big Depth: An Open-Source Macro Focus Slider→

Posted in backlash, camera slider, digital cameras hacks, Hardware, linear rail, macro photography

Tame the Tape: Open-Source Dotterboard for Bulk SMT Parts

Posted on March 30, 2026 by Matt Varian
Dotterboard smt counter

One of the great things about building electronics today is how affordable SMT components have become — sometimes just fractions of a cent each. That low price often means ordering …read more Continue reading Tame the Tape: Open-Source Dotterboard for Bulk SMT Parts→

Posted in counting, Hardware, rp2040, smt, SMT tape

No More Paperweight: This Vintage Brick Phone Is Back Online

Posted on March 13, 2026 by Matt Varian
pi 1990s brick phone

Remember those brick cellphones in the 1990s? They were comically large by today’s standards. These phones used the 1G network to communicate and, as such, have been unusable for decades …read more Continue reading No More Paperweight: This Vintage Brick Phone Is Back Online→

Posted in ADG729, brick phone, cellphone, phone hacks, raspberry pi pico 2

Calculator Case to Scratch-Built Pocket E-Reader

Posted on March 11, 2026 by Matt Varian
Mimisbrunnur

E-readers are an awesome creation allowing you to display digital information in a way that requires little battery life. While there’s plenty of very impressive models to chose from on …read more Continue reading Calculator Case to Scratch-Built Pocket E-Reader→

Posted in adafruit feather RP2040, e ink, handhelds hacks, rp2040 | Tagged ePaper

Retro Rover: LT6502 Laptop Packs 8-Bit Power on the Go

Posted on February 18, 2026 by Matt Varian
6502 based laptop

Making your own laptop can be a challenging project, but a doable one, especially given the large number of options available today for computing. Of course nothing says you need …read more Continue reading Retro Rover: LT6502 Laptop Packs 8-Bit Power on the Go→

Posted in 6502, 6502 processor, diy laptop, EHBasic, retrocomputing

Toybox Tractor: Plywood, Lathe Hacks, and 350W of Fun

Posted on February 5, 2026 by Matt Varian

When you think of a toy tractor, what probably comes to mind is something with fairly simple lines, maybe the iconic yellow and green, big rear tires, small front ones. …read more Continue reading Toybox Tractor: Plywood, Lathe Hacks, and 350W of Fun→

Posted in e-bike, Hardware, mini lathe, plywood, tractor

Wired to Wireless: ESP32 Gives Your USB Keyboard Bluetooth

Posted on January 23, 2026 by Matt Varian
ESP32 BTE Keyboard

Few things rival the usability and speed of a full-sized keyboard for text input. For decades, though, keyboards were mostly wired, which can limit where you use your favorite one. …read more Continue reading Wired to Wireless: ESP32 Gives Your USB Keyboard Bluetooth→

Posted in ble, ESP32-S3, Keyboard, peripherals hacks, usb otg

Chamber Master: Control Your 3D Printer Enclosure Like a Pro

Posted on December 31, 2025 by Matt Varian
Chamber-Master

Having an enclosed 3D printer can make a huge difference when printing certain filaments that are prone to warping. It’s easy enough to build an enclosure to stick your own …read more Continue reading Chamber Master: Control Your 3D Printer Enclosure Like a Pro→

Posted in 3d printer enclosure, 3d Printer hacks, dht11, DS18B20, ESP32

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