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    Build A Wooden Portable Speaker Box

    This is a sharing of  a portable speaker design project. Have you ever thought about designing and building your own portable speaker? A project like this is both easy and cheap if you source your parts wisely and have basic knowledge of electronics, soldering, and box construction.  The...
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    Current problems of TIP122

    I was testing some things on my protoboard to learn a little about transistors. I made this: The batteries are two AA 1.5V in series. The resistor is a 1Kohm. The transistor in a TIP122(http://www.kynix.com/uploadfiles/pdf9675/TIP122.pdf) npn darlington. I uploaded a code that just put Pin9...
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    Dot matrix display pilot question

    Hi everyone !!!I'm starting to learn c lenguage for PIC and i would like to realize one dot matrix 8x8 display with an microcontroller someone can help me ? Which is the right step to introduce this particular range argument because i want focus my study for any particular argument so I can...
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    I'm struggling to understand the function of transistors

    Hi, I hope this is the right sub-forum. One of the SMD devices that I thought was just a PNP transistor for supplying 5v to LEDs turns out to be a BCR185W - PDF datasheet - which is a digital transistor. New to me. I wonder if anyone can explain things below to me in a way that my awkward...
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