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22 Jan 2012

A Low Cost Sidereal Clock – [via]

A clock that displays UT(Universal Time) and LST (Local Sidereal Time) is a useful device to have in an astronomical observatory. Using the Arduino open source platform it is possible to build a sidereal clock for less than $200.

A Low Cost Sidereal Clock - [Link]

11 Nov 2011

adafruit.com writes:

16×24 LED Matrix – Easy to use, chainable displays. These LED panels take care of all the work of making a big matrix display. Each panel has six 8×8 red matrix modules, for a 16×24 matrix. The panel has a HT1632C chip on the back with does all the multiplexing work for you and has a 3-pin SPI-like serial interface to talk to it and set LEDs on or off. There’s a few extras as well, such as being able to change the brightness of the entire display, or blink the entire display at 1 Hz.

16×24 LED Matrix – Easy to use, chainable displays - [Link]

 



 
 
 

 

 

 

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