[Alex] wanted to draw on his oscilloscope, but decided that he would try something other than the microcontroller-based solutions we have seen in the past. He figured the easiest and most ...

Actually, a comment poster in the last entry asked a very reasonable question about just how the draw is made. I confess that ... you put a lot of emphasis on the easy/draw, tough/draw criteria ...

The low-cost drawing machine that [jegatheesan] made for his daughter reminds us that you can prototype, and then make a functioning mechanical Da Vinci with very basic materials and mostly hand ...