Carry a bottle of not very good, but if three of them at once, and you carry no bag, no? Make for such cases of plastic plates or plywood that such a compact handle with shaped holes in them are inserted, and held securely the necks of bottles, which allows you to transfer them without problems.
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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...
DESIGN FROM THE HEART
I confess, the "itch" technical creativity in me woke up still in adolescence. But at that time there was not tangible (money, space) and technical (tools, machinery) base for its...
