Water-demanding plants and flowers require frequent watering, which is not always feasible, for example, in the holiday period. Available way out of such difficulties is a simple device acting on the principle of bird autokorpusas. Depending on the diameter of the used bottles or cans or pick up a roll of sheet steel cylinder with a slightly smaller internal diameter so that the neck nearly to reach the bottom of the tray, which will be a flower pot and offer “automatic”.
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Among the many toys in the electronics, is able to mimic the sounds of animals, is very amusing. For example, a toy cow, imitating mooing, or a pig, saying, "let's Go home, I'm hungry!"...
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DEVICE FOR CHARGING BATTERIES is a rectifier device with electronic current regulator (Fig. 1). A rectifier manufactured by bridge circuit of diodes V1 — V4 (Fig. 2), and the electronic...
