TO CHARGE OR CHANGE?

TO CHARGE OR CHANGE?The device was created to check the capacity of Nickel-cadmium and Nickel-metal hydride batteries, but they can check for any small capacity batteries and dry cells. The device is composed of two parts — digital multimeter and active load. The voltmeter consists of a transmitter “amplitude-time” on the element DD1.1 and the transistors VT1 — VT4, generator counting pulses on DD1.2 and pulse counters for DD2 — DD4.

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WITHOUT BURSTS

Carrying water-filled bucket at a great distance, it is difficult to ensure that it is not spilled. The problem will remove a simple technique, often used by rural Housewives is sufficient to lower the surface of the water with any floating disc, for example, plywood.

THE BOLT CAP

Under certain operating conditions (e.g., vibration) threaded connections progressively’m quite unhinged by it. To avoid this, do not have to screw the lock nut: its role can play and a kind of cap, bitumen or melted plastic coated on the end of the bolt and nut.   V. GOLOVASHIN, Rybnoe, Ryazan region.