Xerox has announced a breakthrough in printable circuits. They’ve developed a conductive ink called “silver bullet” that can be printed on many different types of substrate to create circuits. The key part of the new ink is its lower melting point. Plastic film substrate melts at 150 degrees Celsius but the ink is liquid when ten degrees cooler to avoid damaging the film. This begs the question: how do you then solder components to the circuit?

The benefits of printable circuitry are obvious. Aside from cheaper and easier RFID, disposable circuits like greeting cards, and fabric-based electronics, we’re hoping this will facilitate more environmentally friendly PCB fabrication. That really depends on the ink’s production process and the resilience of the resulting circuitry.

[via Gizmodo]

This ancient by internet standards, circa 2002, but its a great read.  [Eddie], frustrated by the high cost of ink cartridges set out to build a continuous inking system. This would mean that the cartridges would be filled from larger, cheaper reservoirs of ink continually. Along the way he transitioned from simple tubes with some putty to more complicated systems. Eventually he had to hack the chips that told the printers the cartridge was in need of replacement.  While the systems he’s using may be difficult to find now, the execution should work on other models. Completely unrelated to the project itself, is that [Billy Mays] as the site favicon? We suspect it is [Eddie] himself.

[via hacknmod]

[Jen Hui Liao] created a device that guides the user into drawing a portrait of themselves. Dubbed Self-Portrait Machine, it comments on how much in society is created by machines and we are dependent on them. Unlike previous drawing robots, the user is part of the sketching process. The machine holds the users hands and uses stepper motors and servos to move them around like a LOGO turtle. Liao promises to have more details available soon. Video of the machine after the jump.

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[bre] passed along this portrait drawing robot from the same people that brought you the chief cook robot. Like the previous project, the portrait drawing bot emphasizes man machine interaction. The subject sits down and is asked for the quill. The robot captures the subject’s image and runs it through several processing steps. One set is to determine the contours and another is to determine the fill. The robot then draws the the contours and fills returning to the ink pot each time it reaches a trajectory threshold. Quill drawing can be quite hard for novice illustrators, but the robot’s smooth trajectory calculations prevent drips and stains.