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DIY

Suzanne Deffree
Editor
Home for DIY (do it yourself) hobbyist, hackers, and honed engineers where you can exchange ideas and design knowledge on electronics. Find answers to DIY challenges and new opportunities amongst a community of skilled electronics makers.

Clever engineering creates rock-bottom component tester

A cleverly designed little board hits the sweet spot, for mere lunch money. Read More...

3 pins, 3 LEDs, 3 buttons

This LED multiplexing scheme allows for switches in the matrix too. Read More...

ESD wrist-strap insulation decomposes

Several ESD wrist straps suddenly have exposed wires as the insulation fails and gets sticky. Read More...

Bluetooth v4.1: What developers need to know

Here’s how the newest chips can take advantage of the latest version of Bluetooth technology’s new functionality Read More...

Hybrid vacuum tube/solid-state audio power amplifier

An audio power amp design that combines vacuum tube input circuitry with solid-state output and feedback components. Read More...

New Raspberry Pi model adds pins, ports, and lower power

An update of the Raspberry Pi Model B - called the Raspberry Pi Model B+ - incorporates numerous small improvements that have been requested by users. Read More...

555-based class-D headphone driver makes great practice amp

This class-D audio amp “plays” to the 555’s strengths. Read More...

Quick & dirty cable length & impedance measurement

Can't afford a full-blown TDR? Here are a few quick & dirty measurement tips. Read More...

>> SEE ALL

3 pins, 3 LEDs, 3 buttons

This LED multiplexing scheme allows for switches in the matrix too. Read More...

Hybrid vacuum tube/solid-state audio power amplifier

An audio power amp design that combines vacuum tube input circuitry with solid-state output and feedback components. Read More...

HB-LED flashing beacon repurposes switching regulator

A classic, low-cost “switcher” IC is repurposed to flash a high-brightness LED in this minimal-parts-count Design Idea. Read More...

555-based class-D headphone driver makes great practice amp

This class-D audio amp “plays” to the 555’s strengths. Read More...

Facilitate oscilloscope debug of small microcontroller systems

A probe-to-the-metal approach is often the best way to debug a small µC system, and here’s some code to help out. Read More...

Zener level-shifter drives high-side switch

Simplify a high-side driver by replacing a transistor with a Zener diode. Read More...

Milliohm Squawker great at finding shorts and reverse engineering PCBs

This well thought out tool for “listening to” low resistances really speeds troubleshooting & tracing. Read More...

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Desktop PCB factory turns your design into a working circuit in 30 minutes

What would you do if you could turn the schematic you sketched on the back of a napkin during your lunch break into a fully-assembled circuit before your afternoon coffee break? Read More...

New Raspberry Pi model adds pins, ports, and lower power

An update of the Raspberry Pi Model B - called the Raspberry Pi Model B+ - incorporates numerous small improvements that have been requested by users. Read More...

FPGA boards under $100: Introduction

I’m kicking off a major series of hands-on reviews of sub-$100 FPGA boards, so hop on “board” as we start our exploration. Read More...

Audio step attenuator with 47 positions offers precise volume control

Offered as the first in a series of new PCB-based audio switches, the A47 stepped attenuator from Elma Electronic provides 47 positions with selectable end-stops from one to six channels. Read More...

Molded enclosure houses Raspberry Pi Model B

Hammond Electronics has developed a new moulded enclosure specifically designed to house the Raspberry Pi Model B credit card sized computer. Read More...

Printoo: Printed electronics made Arduino compatible

A spin-out from YDreams, Ynvisible was founded in 2010 with the goal to bring more interactivity to everyday objects and surfaces, mostly through the use of flexible and printed electronics including the company’s fully transparent electrochromic display. Read More...

Card brings rich set of audio functions to Raspberry Pi

Jointly developed by element14 and Wolfson Microelectronics, the Wolfson audio card for the Raspberry Pi supplies multiple types of input sources and outputs to enable high-definition audio capture and playback. Read More...

Arduino add-on board targets gaming

Scottish interface chip designer FTDI Chip has developed a gaming add-on board for the Arduino open-source development platform. Read More...

Raspberry Pi control and display interface is plug and play

The PiFace Control and Display announced by Farnell element14 is a new accessory for the Raspberry Pi that allows users to control the computer and see information without the need for a separate screen or keyboard. Read More...

$15 Raspberry Pi dev board for xCORE multicore MCUs

XMOS has launched a $14.99 500MIPS multicore development kit that links to the popular Raspberry Pi board and its other development boards. Read More...

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Chumby offers opportunity for home engineering

Because anyone can submit an app and Chumby Industries has been very open to hacking the Linux kernel, there are several ways to change the firmware with OpenEmbedded to tailor the Chumby One to your own needs. Read More...

Rummage through a Roomba: Sensor-packed vacuum robot attracts hacks

This autonomous robot packs a series of sensors and motors to not only vacuum homes the world over, but also double as a robotic platform for would-be developers. Read More...

Prying apart a portable audio player

Prying Eyes: A look inside Sandisk's Sansa M250 reveals platform minded design decisions, surprising flash-memory choices, and potential hacks. Read More...

Evaluate your application's energy-harvesting vibrational profile with a Slam Stick

To know whether your application is suitable for vibrational energy harvesting, you must determine its vibrational profile. Mide Technology's Slam Stick data logger and open-source software can ease your profiling task. Read More...

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10 free math analysis and design tools for engineers

Back by popular demand is another round of free tools that engineers and DIYers can use with their various projects. Read More...

3D printing expands beyond makers

Although technical and pricing challenges remain, 3D printing has evolved from a medium used by an exclusive few to a manufacturing trend that some believe will see widespread adoption in 2014. Read More...

Try an oscilloscope for under $200

You can get an oscilloscope for under $200. Some are even worth investigating for your toolbox. Read More...

Power to the people: the democratization of engineering

When it comes to open source, software is years ahead of hardware. But with encouragement from established electronics industry players and moves from makers and hackers, engineers could see open-source hardware and an increasingly democratized, community-based approach worked into and enhancing their design cycles. Read More...

8 hacks to watch at DESIGN West's Black Hat Summit

You can learn to hack into someone’s car or smartphone, build an underwater vehicle or tele-presence robot among the interesting DIY projects at DESIGN West 2013. Read More...

Adding analog I/O for our serial bus sensor interface

Adding analog I/O to allow sensors to present digital information directly to our embedded microcontroller is useful to provide real world analog information like light level, temperature, pressure, voltage, current, resistance, and so on. Read More...

Digital I/O in chunks: distribute control and status

Using serial protocols for distributed digital I/O can save time and money while increasing reliability and flexibility. Testing is simplified, and this approach makes it easy to expand and add functionality, too. Read More...

Make your own IIC interface to a parallel character LCD

Here’s how to connect the parallel bus alphanumeric displays using a simple IIC serial scheme from your microcontroller. This article also shows how to structure firmware and drivers to create very efficient data storage of canned messages and display modes. Read More...

Project e-smart, part 1: Students convert Smart car into an EV

For a student project at the Institute for Internal Combustion Engines and Automotive Engineering at the University of Stuttgart, a commercial compact car with combustion engine was converted to an electric vehicle. Read More...

Engineer shares how to build an electric vehicle from the ground up -- Part 1: Design choices

Frustrated by fast-rising gasoline prices, John Santini, vice president of engineering at TDI Power, decided to turn his creativity and problem-solving skills toward developing his own electric vehicle. Read More...

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Clever engineering creates rock-bottom component tester

A cleverly designed little board hits the sweet spot, for mere lunch money. Read More...

ESD wrist-strap insulation decomposes

Several ESD wrist straps suddenly have exposed wires as the insulation fails and gets sticky. Read More...

Quick & dirty cable length & impedance measurement

Can't afford a full-blown TDR? Here are a few quick & dirty measurement tips. Read More...

The $11 spectrum analyzer & SDR

It may not be a Tek or Agi or R&S (or even Rigol), but if your needs are modest, you can have an $11 spectrum analyzer and software-defined radio. Read More...

Into the air, senior birdmen!

After 20 years in hibernation, a homebuilt aircraft rises again on the wings of friends. Read More...

IMS2014: Learn those puzzling microwaves

French company elliptika had developed a teaching tool for learning about microwaves and passive components. Read More...

Semi-coherent emissions: 30 rules of lighting, UVLED 3D printer & lumen lust

The latest non-random sampling of premier products, trending technologies, gossip and goings-on within the solid-state lighting universe. Compiled, Curated and Commented by Lee H. Goldberg – Managing Editor, EDN’s LED Design Center. Read More...

Never use pigtails on cable shields

Videos show the results of using pigtails on shielded cable compromises shielding effectiveness. Read More...

Hackers turn trash into treasure with 3D printer built from e-waste

A team of West African hackers have created an open-source design for a 3D printer made primarily from e-waste. With prototypes already printing parts for the next generation of machines, their creation promises to turn the region’s growing piles of imported e-waste from an environmental problem into an economic asset. Read More...

Desktop PCB factory turns your design into a working circuit in 30 minutes

What would you do if you could turn the schematic you sketched on the back of a napkin during your lunch break into a fully-assembled circuit before your afternoon coffee break? Read More...

>> SEE ALL

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