Production of cinder blocks. Drawing, description

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Production of cinder blocks. Tips for the home master

Builder, home master

If you are going to build something: a garage, a bathhouse, a barn, or maybe a house, but you have a “stress” with materials, then do-it-yourself cinder blocks will help you out a lot. You will need a sheet metal mold 3 mm thick. Together with assistants, using a concrete mixer, you can “produce” up to 300 blocks per day without much effort. Is it a lot or a little? Judge for yourself: a 6x4 m garage will require 450 such blocks, and 6,5 pieces per floor of a 8x1000 m house.

The solution is prepared like this. Knead a slightly moistened mixture (the amount of water is determined empirically) in the proportion: cement - 1 part, slag or expanded clay - from 7 to 12 (the proportion is given for M400 cement). Having set the form on a flat area, fill it with mortar, ram it with a manual tamper and, having aligned it along the upper edge, cut off the excess with a metal strip. Now carefully remove the form (it is without a bottom) - the block is ready.

Concrete block mold (all dimensions are internal, welds are external) (click to enlarge)

Place the form side by side and repeat the process. At the end of the work, do not forget to thoroughly wash the mold with water. After 24 hours, the blocks can already be stored (no more than three in height), making room for the next batch. The size of the form is given in case you decide to lay walls with an additional 1/2 brick cladding. If your building will have walls plastered on both sides, then you can take arbitrary sizes - if only you could then lift such a block with your hands. And when laying walls with a thickness of 50 cm, do not forget to “dress” with a bonded brick row every two rows of blocks.

Author: V.Nakonechny

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Speed sensor VG481V1 13.08.2020

The new VG481V1 sensor from Honeywell is designed to measure the speed of rotation of a ferrous metal gear.

The sensor allows you to detect the fact of the passage of a gear tooth. The moving gear tooth changes the magnetic field created by the bias magnet, which is recorded by the Hall sensor. With dual-peak detection circuitry, the VG481V1 can measure the speed of the gear with high reliability.

The VG481V1 speed sensor is used in automotive transmissions and, in general, is applicable in any transmission and mechanisms where it is necessary to monitor the rotation of a ferrous metal gear.

The VG481V1 includes a voltage regulator, a clock generator, a Hall element, an amplifier, a high and low detection circuit, a comparator, and an output stage. The sensor is protected from abnormal operation at voltages below the minimum threshold, the output of the microcircuit is resistant to short circuits.

The power circuit is insensitive to reverse voltage polarity. When power is applied to the sensor, the trigger circuit does not allow operation until a stable reading is established. VG481V1 allows you to define zero rotation speed.

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Rotation speed measurement;
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