Playing DOOM In Discord With A Special Image URL

September 28, 2025 by 2 Comments

Can you play DOOM in Discord? At first glance, that may seem rather nonsensical, as Discord is a proprietary chat service and neither a hardware device nor something else that may seem like an obvious target for being (ab)used for demon-shooting points. That is, until you look at Discord’s content embedding feature. This is where [PortalRunner]’s Doomcord hack comes into play, allowing you to play the entire game in a Discord client by submitting text messages after embedding a very special image URL.

Rather than this embedding being done in the client as done with e.g., IRC clients, the Discord backend handles the content fetching, caching, and handing off to clients. This system can easily be used with an animated GIF of gameplay, but having it be seen as a GIF file required adding .gif to the end of the URL to trick Discord’s backend into not simply turning it into a static PNG. After this, Discord’s throttling of message speed turned out to kill the concept of real-time gameplay, along with the server load.

Plan C thus morphed into using Chocolate Doom headless, rendering gameplay into cached video files by using the demo gameplay feature in DOOM. The Doomcord server template project provides a server if you want to give it a whirl yourself. Since this uses recorded gameplay, the switch was made from GIF to the WEBP format to save space, along with a cache expiry system. Just level 1 with all possible input sequences takes up 12 TB of disk space.

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Hackaday Links: September 28, 2025

September 28, 2025 by 12 Comments

In today’s “News from the Dystopia” segment, we have a story about fighting retail theft with drones. It centers on Flock Safety, a company that provides surveillance technologies, including UAVs, license plate readers, and gunshot location systems, to law enforcement agencies. Their flagship Aerodome product is a rooftop-mounted dock for a UAV that gets dispatched to a call for service and acts as an eye-in-the-sky until units can arrive on scene. Neat idea and all, and while we can see the utility of such a system in a first responder situation, the company is starting to market a similar system to retailers and other private sector industries as a way to contain costs. The retail use case, which the story stresses has not been deployed yet, would be to launch a drone upon a store’s Asset Protection team noticing someone shoplifting. Flock would then remotely pilot the drone, following the alleged thief back to their lair or hideout and coordinating with law enforcement, who then sweep in to make an arrest.

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Decorate Your Neck With The First Z80 Badge

September 28, 2025 by 4 Comments

Over the years, we’ve brought you many stories of the creative artwork behind electronic event badges, but today we may have a first for you. [Spencer] thinks nobody before him has made a badge powered by a Z80, and we believe he may be right. He’s the originator of the RC2014 Z80-based retrocomputer, and the badge in question comes from the recent RC2014 Assembly.

Fulfilling the function of something you can write your name on is a PCB shaped like an RC2014 module, with LEDs on all the signal lines. It could almost function as a crude logic analyser for the system, were the clock speed not far too high to see anything. To fix this, [Spencer]’s badge packs a single-board RC2014 Micro with a specially slow clock, and Z80 code to step through all memory addresses, resulting in a fine set of blinkenlights.

Thus was created the first Z80-based event badge, and we’re wondering whether or not it will be the last. If you’re curious what this RC2014 thing is about, we reviewed the RC2014 Micro when it came out.

A Walk Down PC Video Card Memory Lane

September 28, 2025 by 30 Comments

These days, video cards are virtually supercomputers. When they aren’t driving your screen, they are decoding video, crunching physics models, or processing large-language model algorithms. But it wasn’t always like that. The old video cards were downright simple. Once PCs gained more sophisticated buses, video cards got a little better. But hardware acceleration on an old-fashioned VGA card would be unworthy of the cheapest burner phone at the big box store. Not to mention, the card is probably twice the size of the phone. [Bits and Bolts] has a look at several old cards, including a PCI version of the Tseng ET4000, state-of-the-art of the late 1990s.

You might think that’s a misprint. Most of the older Tseng boards were ISA, but apparently, there were some with the PCI bus or the older VESA local bus. Acceleration here typically meant dedicated hardware for handling BitBlt and, perhaps, a hardware cursor.

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Fully-Local AI Agent Runs On Raspberry Pi, With A Little Patience

September 28, 2025 by 25 Comments

[Simone]’s AI assistant, dubbed Max Headbox, is a wakeword-triggered local AI agent capable of following instructions and doing simple tasks. It’s an experiment in many ways, but also a great demonstration not only of what is possible with the kinds of open tools and hardware available to a modern hobbyist, but also a reminder of just how far some of these software tools have come in only a few short years.

Max Headbox is not just a local large language model (LLM) running on Pi hardware; the model is able to make tool calls in a loop, chaining them together to complete tasks. This means the system can break down a spoken instruction (for example, “find the weather report for today and email it to me”) into a series of steps to complete, utilizing software tools as needed throughout the process until the task is finished.

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Smart Home Gets A Custom Keypad Controller

September 28, 2025 by 3 Comments

Voice assistants and smartphones are often the go-to interfaces for modern smart home systems. However, if you fancy more direct physical controls, you can go that route as well. To that end, [Salim Benbouziyane] whipped up a nifty keypad to work with his Home Assistant setup.

The build is based on an ESP32 microcontroller, which has wireless hardware onboard to communicate with the rest of [Salim’s] Home Assistant setup. Using the ESPHome firmware framework as a base, the microcontroller is connected to a four-by-three button keypad array, built using nice clicky key switches. There’s also an indicator light on top as a system status indicator. A fingerprint scanner provides an easy way for users to authenticate when disarming the alarm.

Security and speed were the push for [Salim] to whip up this system. He found it difficult to disarm his alarm in a hurry when fumbling with his phone, and the direct keypad entry method was far more desirable.

Sometimes, the easiest route to the smart home of your dreams is to just build the exact solutions you need. Video after the break.

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NTRON Plays Games, Music

September 28, 2025 by 7 Comments

What do you get if you meld a Raspberry Pi, a chiptune synthesizer, and a case that looks like an imaginary Kenback-2000? Well, if you are [Artifextron], you get the NTRON. Part Nintendo console, part chip tune synthesizer, and part objet d’art. You can see the device do its things in the video below.

This is less of a bare metal design and more of a synthesis of parts, but it is a very clever system design using audio mixers and an assortment of modules to do its tasks. It does have an IC handling the gamepad ports. Of course, it also features a ton of 3D printed parts.

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