Sundial Casts Digital Display — No Electronics Needed
The angled holes in this cool 3D printed Sundial casts a shadow that looks like a digital clock display.
sundial
Tell Time with this 3D Printed Portable Sundial
Sundials have been used to tell time for thousands of years. People have been able to tell you what time of day it is pretty accurately with just a stick (known as a style), a shadow, and some markings on the ground. Nowadays, not many people know how to read sundials and many prefer digital watches […]
This Sundial Spells Solstice
Four times a year, when our planet is in the appropriate alignment with the sun, the shadow this sundial casts onto the ground spells out either “solstice” or “equinoxe.”
Sundial cannon fires at noon
The glass is aligned to concentrate the sun’s rays, lighting the cannon’s fuse at high noon. More pics here, and a very detailed .pdf from the British Sundial Society on so-called “noon cannons” here. [via Neatorama]
Laser sundial
Spotted in the MAKE Flickr pool, a nifty laser “sundial,” controlled by an ATtiny24 MCU and a servo: An Atmel ATtiny24 microcontroller drives an R/C servo which in turn rotates a line LASER taken from a LASER level. The microcontroller runs a software real time clock and turns the servo and the line LASER to […]
Robotic sundial recreates old tech with new
Built with the LEGO NTX platform (plus PDA support processor), the Sundial Robot uses sensor data to calculate time of day the new/old-fashioned way – In operation, the robot rotates 360 degrees to calibrate the Compass Sensor. It then rotates in 5 degree increments, the light sensor is swept from vertical until the Touch Sensor […]
