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    • Overall Rating: 5
    • Price: 5
    • Quality: 5
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
    earned for this post
    Arduino track the time.

    posted by dirkm5 on 11/04/2012 Certified Owner

    Involvement:General (knows how to use it) - Ownership:1 week to 1 month

    Pros:
    Works great using the DS1302 library written by Henning Karlsen. The library can be found at http://www.henningkarlsen.com/electronics/library.php?id=5 Circuit board includes crystal and backup battery. Set the date and time correct one time, then read the...
    Cons:
    Wires to connect with Arduino-board not included.
    View Detail » 
    • Overall Rating: 4
    • Price: 5
    • Quality: 2
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
    earned for this post
    5 mW red light laser with focusing lens

    posted by dirkm5 on 11/04/2012 Certified Owner

    Involvement:General (knows how to use it) - Ownership:1 week to 1 month

    Pros:
    This laser LED looks similar to SKU 133778, rated to be 5 mW. To operate with a 5V power supply, a series resistor is required. I used a series resistor of 1.2kOhhm, resulting in 2V over the laser and a current of 2.5mA, resulting in 5 mW power dissipation....
    Cons:
    Had to bend wires between circuit board and laser module to eliminate the short circuit.
    View Detail » 
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