It’s a simple robot that drags a pen around to draw on paper. [Tim] decided to build one that uses a simple skid-steer design to get around the page. An Arduino Nano is the brains of the ...

If you like what you see, the robot will then begin to draw your portrait on a piece of paper. It does this using two human-like arms which are made from aluminium and driven by two stepper motors.

The practice of drawing blood has changed very little over the decades. It looks about the same now as it did 50 years ago.

Unlike with a traditional blood draw, the patient does not see the needle go into the arm nor the tubes of blood. The process takes about two minutes and has a 95% success rate on the first attempt.