Rain from under an umbrella. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Rain from under an umbrella. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Tell the audience that it's going to rain. Take an umbrella, open it and hold it above your head. And it will really rain - drops of water will spill from the dome of the umbrella onto the floor! (Fig. a).

Focus Rain from under an umbrella

Focus secret:

The secret of the trick is in a small rubber can - in a rubber bulb - with water, which you discreetly hold in your hand. When opening the umbrella, quietly put the can on the tube coming out of the hollow handle of the umbrella. At the right moment, slowly press on the can, and the water will rush up the handle, and leaving the small holes of the upper sealed end of the umbrella, it will flow down the dome and, like rain, drip onto the floor (fig. b).

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Random news from the Archive

PLM-40E - 40W Step Dimming LED Driver 14.07.2016

Mean Well has expanded its range of low cost indoor LED drivers. At the moment, the new PLM-12E series has been added to the existing PLM-25E and PLM-40E series with 40W output power and only 24mm thickness.

The power supply has power factor correction (PFC; PF>0.95), operates in current stabilization mode (CC) and is available for the following standard load current values: 350, 500, 700, 1050, 1400, 1750 mA.

In addition to the low profile, a feature of the new series is the possibility of 3-step dimming through a conventional switch without additional devices. When switching off for a short time and then switching it back on (less than 2,5 sec / OFF-ON), the output current is reduced in steps of 100% - 40% - 10%.

In order to reduce the cost, in the new PLM-40E series, the manufacturer has abandoned the universal input (100/240 V). The input voltage range was chosen to be 180-295 V, which is in good agreement with our domestic electrical networks. For fixtures that do not require operation in 100/115 V networks, this series will be the best choice in terms of functionality and cost.

Main technical parameters and features of PLM-40E series:

Output power 40W
Stabilization mode - current stabilization
Output current from range: 350, 500, 700, 1050, 1400, 1750mA
Step dimming by switch
Input voltage range 180-295V
Power factor >0,95
Efficiency 88% (typ.)
IP30 (plastic housing with enclosed terminals)
Class II for electrical safety (grounding is not required)
Protection against short circuit and overheating
Operating temperature range -30°C...+40°C
Dimensions (LxWxH) 175 x 42 x 24 mm

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