Search Results for "count down timer"

...The design files include the Fritzing CAD files, the etchable PDF PCB layout files, the Gerber files, parts listings, software listings (embedded software listings and Website scripts), and schematics of the circuit boards. There are two circuit boards which are the main controller board and the Timer/Regulator board. The Main controller board performs all the processing of the system. The timer/regulator board converts the 12vdc input voltage to the 3.3v and 5v DC voltages used by the main controller board. The timer/regulator board communicates with the main board via a serial communication cable. The timer/regulator board can be commanded by the main board to power the system down for a precise interval in order to conserve battery power. ...

The Rise and Shine LED clock has been designed to educate and encourage hacking and modifying of both software and hardware. This is a analogue style digital clock with multiple display states, a 24 hour alarm, a count down alarm, multiple alarm display states and a demo mode. One of the alarm states is a dawn simulating alarm, where the lights gradually come on over 20 minutes, enducing a natural waking sleeping pattern, with out the shock of a abrupt noisy alarm sound. Hence the name "Rise and Shine", although the name also works well with the educational objectives.