Like a baby in her wrap… instrument, and in this fold it is convenient to carry and easy to store. And minimized packaging does not even need tying: itself biases, since it is obtained from a suitable cut of the plastic bottle.
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SCREWDRIVER CONDUCTOR
This simple improvement will facilitate the work standard screwdriver, especially where it is difficult to get the tip into the slot of the screw or screws. This will require only two...
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Two LEDs with different color (e.g., red and green), you can build a simple indicator for voltages from 4.5 to 220 V. It is also able to determine the polarity of the source in the range...
