Customizable PCB Business Card

[Corey Harding] designed his business card as a USB-connectable demonstration of his skill. If potential manager inserts the card in a USB drive, open a text editor, then touches the copper pad on the PCB, [Corey]’s contact info pops up in the text box.

In addition to working as a business card, the PCB also works as a Tiny 85 development board, with a prototyping area for adding sensors and other components, and with additional capabilities broken out: you can add an LED, and there’s also room for a 1K resistor, a reset button, or break out the USB’s 5V for other uses. There’s an AVR ISP breakout for reflashing the chip.

Coolly, [Corey] intended for the card to be an Open Source resource for other people to make their own cards, and he’s providing the Fritzing files for the PCB. Fritzing is a great program for beginning and experienced hardware hackers to lay out quick and dirty circuits, make wiring diagrams, and even export PCB designs for fabrication. You can download [Corey]’s files from his GitHub repository.

For another business card project check out this full color business card we published last month.

First Look at ABC: Basic Connections

[Alberto Piganti], aka [pighixxx] has been making circuit diagram art for a few years now, and has just come out with a book that’s available on Kickstarter. He sent us a copy to review, and we spent an hour or so with a refreshing beverage and a binder full of beautiful circuit diagrams. It doesn’t get better than that!

[pighixxx] started out making very pretty and functional pinout diagrams for a number of microcontrollers, and then branched out to modules and development boards like the Arduino and ESP8266. They’re great, and we’ll admit to having a printout of his SMD ATMega328 and the ESP-12 on our wall. His graphical style has been widely copied, which truly is the sincerest form of flattery.

But after pinouts, what’s next? Fully elaborated circuit diagrams, done in the same style, of course. “ABC: Basic Connections” started out life as a compendium of frequently used sub-circuits in Arduino projects. But you can take “Arduino” with a grain of salt — these are all useful for generic microcontroller-based projects. So whether you want to drive a 12 V solenoid from a low-voltage microcontroller, drive many LEDs with shift registers, or decode a rotary encoder, there is a circuit snippet here for you. Continue reading “First Look at ABC: Basic Connections”

Creating A PCB In Everything: Creating A Custom Part In Fritzing

This is the continuation of a series of posts where I create a schematic and PCB in various EDA tools. Already, we’ve looked at Eagle CAD, KiCad, and took a walk down memory lane with one of the first PCB design tools for the IBM PC with Protel Autotrax. One of the more controversial of these tutorials was my post on Fritzing. Fritzing is a terrible tool that you should not use, but before I get to that, I need to back up and explain what this series of posts is all about.

The introduction to this series of posts laid it out pretty bare. For each post in this series, I will take a reference schematic for a small, USB-enabled ATtiny85 development board. I recreate the schematic, recreate the board, and build a new symbol and footprint in each piece of software. That last part — making a new symbol and footprint — is a point of contention for Fritzing users. You cannot create a completely new part in Fritzing. That’s a quote straight from the devs. For a PCB design tool, it’s a baffling decision, and I don’t know if I can call Fritzing a PCB design tool now.

Continue reading “Creating A PCB In Everything: Creating A Custom Part In Fritzing”

Creating A PCB In Everything: Friends Don’t Let Friends Use Fritzing

This week, we’re continuing our Creating A PCB In Everything series, where we go through the steps to create a simple, barebones PCB in different EDA suites. We’re done with Eagle, and now it’s time to move onto Fritzing.

fritzing-logoFritzing came out of the Interaction Design Lab at the University of Applied Sciences of Potsdam in 2007 as a project initiated by Professor Reto Wettach, André Knörig and Zach Eveland. It is frequently compared to Processing, Wiring, or Arduino in that it provides an easy way for artists, creatives, or ‘makers’ to dip their toes into the waters of PCB design.

I feel it is necessary to contextualize Fritzing in the space of ‘maker movement’, DIY electronics, and the last decade of Hackaday. Simply by virtue of being an editor for Hackaday, I have seen thousands of homebrew PCBs, and tens of thousands of amateur and hobbyist electronics projects. Despite what the Fritzing’s Wikipedia talk page claims, Fritzing is an important piece of software. The story of the ‘maker movement’ – however ill-defined that phrase is – cannot be told without mentioning Fritzing. It was the inspiration for CircuitLab, and the Fritzing influence can easily be seen in Autodesk’s 123D Circuits.

Just because a piece of software is important doesn’t mean it’s good. I am, perhaps, the world’s leading expert at assessing poorly designed and just plain shitty PCBs. You may scoff at this, but think about it: simply due to my vocation, I look at a lot of PCBs made by amateurs. EE professors, TAs, or Chris Gammell might beat me on volume, but they’re only looking at boards made by students using one tool. I see amateur boards built in every tool, and without exception, the worst are always designed in Fritzing. It should be unacceptable that I can even tell they’re designed in Fritzing.

Fritzing has its place, and that place is building graphical representations for breadboard circuits. Fritzing has no other equal in this respect, and for this purpose, it’s an excellent tool. You can also make a PCB in Fritzing, and here things aren’t as great. I want to do Fritzing for this Creating A PCB In Everything series only to demonstrate how bad PCB design can be.

For the next few thousand words, I am going to combine a tutorial for Fritzing with a review of Fritzing. Fritzing is an important piece of software, if only for being a great way to create graphics of breadboard circuits. As a PCB design tool, it’s lacking; creating parts from scratch is far too hard, and there’s no way to get around the grid snap tool. No one should ever be forced to create a PCB in Fritzing, but it does have its own very limited place.

Continue reading “Creating A PCB In Everything: Friends Don’t Let Friends Use Fritzing”

Augmented Reality Breadboarding

[Scott] sent in this tantalizing view of the what could be the future of bread boarding. His day job is at EquipCodes, where he’s working on augmented reality systems for the industrial sector. Most of EquipCodes augmented reality demos involve large electric motors and power transmission systems. When someone suggested a breadboard demo, [Scott] was able to create a simple 555 led blinker circuit as a proof of concept. The results are stunning. An AR glyph tells the software what circuit it is currently viewing. The software then shows a layout of the circuit. Each component can be selected to bring up further information.

The system also acts as a tutor for first time circuit builders – showing  them where each component and wire should go. We couldn’t help but think of our old Radio Shack 150 in 1 circuit kit while watching [Scott] assemble the 555 blinker. A breadboard would be a lot more fun than all those old springs! The “virtual” layout can even be overlayed on real one. Any misplaced components would show up before power is turned on (and the magic smoke escapes).

Now we realize this is just a technology demonstrator. Any circuit to be built would have to exist in the software’s database. Simple editing software like Fritzing could be helpful in this case. We’re also not sure how easy it would be working with a tablet between you and your circuit. A pair of CastAR glasses would definitely come in handy here. Even so, we’re excited by this video and hope that some of this augmented reality technology makes its way into our hands.

Continue reading “Augmented Reality Breadboarding”

123D Circuits: Autodesk’s free design tool

Arduino fanatics rejoice: Autodesk and have jointly released a new electronics design tool with some unique features: 123D Circuits. Anyone familiar with Autodesk knows they have a bit of a habit of taking over the world, but you can relax knowing this is a (pretty much) free product that’s filed under their Free 3D tools—though we’re not quite sure what is “3D” about a circuits layout program.

123D is web-based software, and using it requires account creation on the website. Anything you design sits on the cloud: you can collaborate with others and even embed your circuit (with functioning simulation) straight into a webpage. Unfortunately, your work is public and therefore accessible by anyone unless you fork over $12 or $25 monthly: the former only gives you 5 private circuits. Dollar signs pop up again when you hit “finish circuit;” they offer to sell you PCBs in multiples of three.

Some features of the free account, however, may tempt the Arduino veteran away from a go-to program like Fritzing. Plopping in a virtual Arduino lets you edit its code on the fly in another window, which you can then simulate. If you’re new to circuit design or want some guidance for using 123D Circuits, they have provided an extensive list of applicable Instructables. Check out their promotional video below.

Continue reading “123D Circuits: Autodesk’s free design tool”

Going from idea to schematic to printed PCB

Building a circuit on a bread board makes life much easier, but eventually you’re going to want a PCB for one of your circuits. Luckily, [Will] from Revolt Lab put up a trio of posts that will take you idea and turn it into a schematic and PCB.

First up is an awesome tutorial on the circuit design program Fritzing. While you won’t find Fritzing on the computer of anyone making a living doing circuit design work – those people usually go for Eagle or KiCad – Fritzing is very easy to use but still has a ton of features. Using Fritzing isn’t very hard, either. [Will]’s tutorial goes over copying your breadboarded circuit into Fritzing, creating a schematic from the bread board layout, and finally converting that to PCB artwork.

Once you have board artwork for your circuit, you’re probably going to want a real-life PCB. [Will]’s board etching tutorial goes over the toner transfer method of PCB creation. Basically, print your circuit onto glossy photo paper with a laser printer, put it face down on a copper board, then take a clothes iron to it. If you’re lucky, the laser printer toner will have transferred to the copper making a nice etch resist. To get rid of all that superfluous copper, [Will] used ferric chloride but a Hydrochloric Acid/Hydrogen Peroxide mix will work just as well.

Before you etch your boards, you might want to thing about building an etch tank that keeps all your slightly dangerous chemicals in one container. [Will]’s etch tank uses a large water container and a few pieces of LEGO to suspend the board in the etch solution. It etches boards a lot faster than laying them face down in a tray, allowing you to go from idea to finished piece a lot quicker.