Here’s the most useless machine we’ve seen so far. It comes from the workshop of [forn4x] and happily turns itself off whenever any one of its eight switches are flicked to the on position.
The build began when [forn]’s Canon 850i printer gave up the ghost because of a broken print head. All the other electronics and mechanics were still salvageable, so it was decided to turn this printer into something a little more useless.
The printer used a regular DC motor with an optical encoder to move the print head. [forn] easily found the schematics for this optical sensor, because of the TTL output was able to read out the position of the slider. The rest of the build is an ATMega8, a servo, and an octet of toggle switches. [forn] has been able to get the accuracy of the servo-controlled arm down to about 0.1 mm, more than enough to accurately turn all its switches off.
You can see [forn]’s most useless machine in action after the break.
Continue reading “An even more useless machine”
We think [Brian Delacruz] latched on to a good idea with this photo printer project. Instead of building a big photo booth for his party he developed a Raspberry Pi based WiFi photo printer. Right now it’s a prototype that lacks the kind of polish necessary to make a true user-friendly device. But the idea is solid and just waiting for you to improve upon it.
In addition to the RPi he’s using a quality photo printer and a small wireless router. The router simply provides WiFi capabilities for the RPi which is running a web server, mySQL, and FTP. This provides a wide range of upload options which he can work with. Watch the video after the break to see him print a smart phone photo wirelessly.
This can be simplified by using a package like hostapd to use a USB WiFi dongle as an access point. Or if the venue already has Internet access a server could be set up with a QR code to guide people to it. The party starts off with an empty bulletin board and guests would be invited to print and hang their own photos which will go into the host’s guest book/scrap book to remember the event.
[Steve Wozniak’s] damn the man, devil may care attitude continues to show with this recent interview. Here he shows off the pad of $2 bills he had made up. He’ll sell one sheet of them to you for $5. Do you think that’s a scam? He say’s “you’d be an idiot not to buy it for five bucks” and after we dug a little deeper, he’s right.
Now, you really need to watch the video after the break before you read the rest of this feature. Trust us, it’s extremely entertaining. [Woz] mentions that he hired a local printer to make the pads for him, but he got the paper from a high-quality print shop. They meet the specs of the federal government and by law they’re legal tender. Each pad has a page of four bills which can be torn off of the gummed top, and there are perforations between each bill for easy separation.
Nothing illegal is going on here. We followed one of the YouTube commentor’s links to this article [Woz] wrote about his $2 bill exploits. The high-quality printer he buys the paper from is the Bureau of Printing and Engraving. He buys the bills in sheets and pays a premium for that option. Each $2 bill costs him $3. But the fun he’s had over the years is probably worth it.
Continue reading “[Woz] prints and spend his own $2 bills”
The accuracy which [Mario] achieved in his pen plotter dot matrix printer is very remarkable. He tore through a pile of floppy drives to get the parts he wanted, and chose to go with a fine-point Sharpie marker as a print head. In the video after the break he flatters us with a printout of the Hackaday logo, but you also get a look at one problem with the build. The ink doesn’t always flow from the felt tip and he has to coax it (almost like priming a pump) with a piece of scrap paper.
He was inspired by the pen printer we featured back in June. This rendition features a printing area of 1.5×1.5 inches that can accommodate 120×120 black and white pixels. He’s not a microcontroller type of guy and is driving the printer from the parallel port of his computer.
The best printing technique puts the pen down and moves it around just a bit (helps prevent the ink flow problem we mentioned earlier) and produces images like one in the lower right. We love the 8-bit nature of the result and would use this all the time to make our own greeting cards.
Continue reading “Tearing through floppy drives to build a small-format dot matrix printer”
At first look we thought this was a plotter, but it’s really more of a dot matrix (or line matrix) printer. [Bruno] whipped this up using parts from a DVD optical drive. It is capable of moving the pen along the Z and X axes, and feeding the paper along the Y axis.
The video after the break shows the machine printing Megaman, an image perfectly suited to the low-resolution pixels this can put out. But even without the high-pixel counts you might get from a thermal printer, we just love the look of this one. And who doesn’t have an optical drive sitting around just waiting to be hacked? It looks like the one part you’re going to have to source is the stepper motor and geared feed wheel that moves the paper.
Continue reading “Self-feeding pen printer”
In the days when computers took up an entire room, a CRT monitor was a luxury. Most of the time, input and output was handled with a teletype – a typewriter connected directly to the computer. [Josh] wanted his own typewriter terminal, so he took apart an IBM Selectric II and got to work.
Instead of an electronic keyboard, the IBM Selectric II uses and electromechanical keyboard to tilt and rotate the Selectric’s typeball. In normal operation, a series of shafts underneath the keyboard are engaged. [Josh] added parts of an erector set to those levers and tied each one to one of 16 solenoids.
With a set of solenoids able to print any key with the help of an Arduino, [Josh] had a fully automated typewriter from the early 1970s. [Josh has been printing out a lot of ASCII art lately in preparation for the Kansas City Maker Faire later this month. You can check out the build videos after the break.
Continue reading “Turning an IBM Selectric into a printer.”
Whether it’s building a 3D scanning system with a Kinect, or using a USB TV tuner dongle for software defined radio, there are a lot of interesting off-schedule uses for commodity hardware. The latest comes from the fruitful mind of [sjMoquin] and a Lexmark N2050 WiFi card that runs Linux.
This build started off with a Lexmark X6570 all-in-one printer available for about $100 USD on eBay. This printer comes packaged with a Lexmark N2050 WiFi card running BusyBox. After soldering a few wires to the USB/UART pins on the N2050, [sjMoquin] had a very cheap but highly useful single board computer running Linux.
There is still a little more work to be done – the WiFi and USB on the N2050 aren’t currently supported. [sjMoquin] and [Julia Longtin] are working on that, so a fully functional embedded Linux board based on a printer’s WiFi card should be available soon. It might be time to hit up eBay for a few of these cards, you know.