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  • Buying Used Technical Books?

    One of my student recommended me to check out the website ABE BOOKS dot com where used books were sold. He already bought couples of repairing books and found that the price was very cheap. The only...

    • Posted October 8, 2008
    • 0
  • How To Make LED That Draws From AC Main Line

      A subscriber emailed me with with this question: “How to make an mains indicator with a LED.In my soldering iron the neon or any light and to replace it I like a LED instead of that...

    • Posted October 8, 2008
    • 5
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