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Reverse Engineering A Sony Car Stereo LCD
For his own reasons, [Jose Luis Monteiro] (aka [emsyscode]) decided he needed to drive the LCD on a Sony CDX-A250 car stereo’s front panel using an Arduino. There’s probably a sweet project in the...
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Laser Your Way into Debug Mode on the RP2350
The RP2350 is actually a pretty secure chip, all things considered. It has secure boot, ARMv8’s TrustZone to split secure and non-secure execution, and you can permanently disable debug — the Pi...
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Writing an ESP32 Bluetooth Printer Driver In Two Acts
[Bas BotBerg] wanted to use a portable Bluetooth thermal printer to run off reports on sensor data collected by an ESP32-C3 microcontroller. But as is so often the case these days, the only official...
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Rusting an E-scooter (In a Good Way)
It is a classic Hackaday situation. You have an Egret GT E-scooter. It has a screen that shows the usual dash stats, but that led to an annoyance. You could accidentally enter firmware update mode and,...
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Bluetooth Shock Collar Keeps Wearer On Task
Like a lot of us [Liam Kloppers] had a problem with doomscrolling. Unwilling to go cold-turkey because he does find some utility in social media. He tried a number of things before deciding to say...
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Hacking a Commercial Colorimeter to add RAL Color Code Support
When you need to match paint colors, one of the tools you’ll reach for is a deck of reference colors. Another might be a colorimeter. But what if you want both? [hallko1234] created just that by...
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Sharkfin Bites Attack Shark
The Attack Shark is a modern keyboard with fancy magnetic keyswitches, macros, configurable blinky LEDs, and more. The problem is that the configuration software only works on Windows, so [JR...
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Poking Around with JTAG on a Guitar Amp
You would think a guitar amplifier would be a straightforward piece of analog electronics. But, of course, these days, everything has firmware, including [mforney]’s Yamaha THR10c. The service manual...
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Hacking Hard Drive Firmware
You probably flash new firmware on a variety of devices regularly, even though that’s rare for non-technical types. But what about your hard drive firmware? Most of us don’t want to touch our operating...
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Custom Mainboard for PS2 Portable
As time marches on, the retro gaming community gets more and more access to older systems. This is partially a product of modern computing having much more power to emulate more demanding systems, but...
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Reviving Nintendo’s Early Arcade Game, Wild Gunman
There’s retrogaming, and then there’s retro gaming. This next project falls into the second category, as [Callan] of 74XX Arcade Repair digs into the original Wild Gunman, first released by Nintendo...
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DR-DOS Is Back, But Not Quite as We Knew It
If you weren’t around for the early PC era, or were a little more casual about operating systems, you could perhaps be forgiven for not knowing that DOS is not synonymous with MS-DOS. MS-DOS was just...
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It’s 1979 – What Exactly Did That ∫ Key Do?
[Michel Jean] asked a question few others might: what exactly is going on under the hood of a classic HP scientific calculator when one presses the ∫ key? A numerical integration, sure, but how...
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Take a Ride on wrongbaud’s Hardware Hacking Highway
Regular Hackaday readers will no doubt be familiar with the work of Matthew Alt, AKA [wrongbaud]. His deep-dive blog posts break down hardware hacking and reverse engineering concepts in an engaging...
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The Intel 8087 and Conditional Microcode Tests
Continuing his reverse-engineering of the Intel 8087, [Ken Shirriff] covers the conditional tests that are implemented in the microcode of this floating point processing unit (FPU). This microcode...
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39C3: Liberating ESP32 Bluetooth
Bluetooth is everywhere, but it’s hard to inspect. Most of the magic is done inside a Bluetooth controller chip, accessed only through a controller-specific Host-Controller Interface (HCI) protocol,...
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39C3: Recreating Sandstorm
Some synthesizer sounds are just catchy, but some of them are genre-defining. We think you could make that case for the Roland JP-8000 patch “Sandstorm”, which you’ve heard if you listened to any...
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LLM Dialogue In Animal Crossing Actually Works Very Well
In the original Animal Crossing from 2001, players are able to interact with a huge cast of quirky characters, all with different interests and personalities. But after you’ve played the game for...
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Hosting a Website on a Disposable Vape
For the past years people have been collecting disposable vapes primarily for their lithium-ion batteries, but as these disposable vapes have begun to incorporate more elaborate electronics, these too...
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Using an MCU’s Own Debug Peripheral to Defeat Bootrom Protection
The patient hooked up for some reverse-engineering. (Credit: Caralynx, Twitter) Released in July of 2025, the Tamagotchi Paradise may look somewhat like the late 90s toy that terrorized parents and...
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