To remove or hang on the door hinges alone — for many, this becomes an intractable problem. Make the device shown in the figure, and the case will move forward.
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UNIVERSAL INDICATOR
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...
DESIGNER CARS — “AVTOKONSTRUKTOR”
What should be the car for summer camp? Some not without reason consider that the creation of autoconstructor mug here is futile, since class time is extremely limited. But this, we...
