Category Archives: Tech Hacks

Reverse Engineering A Two-Wire Intercom

There was a time when an intercom was simply a pair of boxes with speakers joined by a couple of wires, with an audio amplifier somewhere in the mix. But intercoms have like everything else joined the digital age, so those two wires now carry a load of other functionality …read more

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Posted in intercom, reverse engineering, serial, Tech Hacks | Leave a comment

How Power Over Ethernet (PoE) Works

A remote Ethernet device needs two things: power and Ethernet. You might think that this also means two cables, a beefy one to carry the current needed to run the thing, and thin little twisted pairs for the data. But no!

Power over Ethernet (PoE) allows you to transmit power …read more

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Posted in Hackaday Columns, office, power, power over ethernet, Tech Hacks, tool hacks | Leave a comment

Customizing Xiaomi ARM Cortex-M Firmware

This hack was revealed a while ago at DEFCON26, but it’s still a fascinating look into vulnerabilities that affect some of the most widely used IoT devices.

[Dennis Giese] figured out a way to modify ARM Cortex-M based firmware for use in customizing the functionality of devices or removing access …read more

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Posted in arm cortex-m, defcon, defcon26, iot village, Tech Hacks, wireless hacks, xiaomi | Leave a comment

The Smallest Homebrewed TTL CPU In the World

The may very well be the smallest homemade TTL CPU we’ve ever seen. Measuring at one square inch, this tiny chip boasts 40 connections, an 8-bit databus, a 16-bit address bus, a 64 kB memory space, reset and clock inputs, and 5 V power lines.

TTL (transistor transistor logic) logic …read more

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Posted in 2019 Hackaday Prize, cpu, Hackaday Prize, hardware, Tech Hacks | Leave a comment

Pushing Pixels To A Display With VGA Without A PC

[Ben Eater] is back with the second part of his video series on building a simple video card that can output 200×600 pixels to a display with nothing but a VGA connection, a handful of 74-logic chips and a 10 MHz crystal. In this installment we see how he uses …read more

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Posted in 74 series logic, breadboard, breadboard hacks, classic hacks, logic, retrocomputing, Tech Hacks, vga, video card | Leave a comment

A Lot Of Volts For Not A Lot

There was a time when high voltage in electronic devices was commonplace, and projects driving some form of vacuum or ionisation tube simply had to make use of a mains transformer from a handy tube radio or similar. In 2019 we don’t often have the need for more than a …read more

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Posted in high voltage, inverter, mosfet, Tech Hacks, transformer | Leave a comment

Who Knew Cut Grass Would Be So Tricky To Move!

Like all publications, here at Hackaday we are besieged by corporate public relations people touting press releases. So-and-so inc. have a new product, isn’t it exciting! But we know you, our readers, we know you like hacks, and with the best will in the world, the vast majority of such …read more

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Posted in grass, materials, materials handling, Tech Hacks | Leave a comment

Talk To Your ‘Scope, And It Will Obey

An oscilloscope is a device that many of us use, and which we often have to use while our hands are occupied with test probes or other tools. [James Wilson] has solved the problem of how to control his ‘scope no-handed, by connecting it to a Raspberry Pi 3 running …read more

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Posted in oscilloscope, Tech Hacks, voice control, voice controlled | Leave a comment

Building A Simple Python API for Internet of Things Gadgets

It’s no secret that I rather enjoy connecting things to the Internet for fun and profit. One of the tricks I’ve learned along the way is to spin up simple APIs that can be used when prototyping a project. It’s easy to do, and simple to understand so I’m happy …read more

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Posted in api, datalogger, Hackaday Columns, how-to, https, IoT, NodeMCU, Original Art, python 3.0, Skills, Tech Hacks | Leave a comment

The Woeful World of Worldwide E-Waste

How large is the cache of discarded electronics in your home? They were once expensive and cherished items, but now they’re a question-mark for responsible disposal. I’m going to dig into this problem — which goes far beyond your collection of dead smartphones — as well as the issues of …read more

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Posted in business model, circular economy, e-waste, economics, Featured, Interest, linear economy, news, Original Art, recycling, Tech Hacks, waste, waste stream, wef | Leave a comment