To receive a direct current, it is enough to take a usual battery. Tension of such source of current, as a rule, standard – 1.5 Volta. Having connected consistently several such elements, it is possible to receive the battery with tension proportional to quantity of such elements. For receiving a direct current it is also possible to use the charger from the mobile phone (5 V) or automobile accumulator (12B). However, if it is necessary to receive non-standard tension, for example, of 42 V, then it is necessary to build the self-made rectifier with the simplest filter of food.
It is required to you
- The lowering transformer of 220 century / 42 century.
- Network cord with a fork
- Diodny Bridge PB-6
- Electrolytic condenser 2000 мкФ×60в
- Soldering iron, rosin, solder, connecting wires.
Instruction
1. Collect the rectifier on the scheme represented in the drawing:
2. Correctly to collect and use such device, the minimum knowledge of the processes happening in the device is necessary. Therefore, attentively study the scheme and the principles of operation of the rectifier. The scheme of action of the diode bridge explaining the principle of its work: During a positive half-cycle (a small stroke a dotted line) current moves on the right upper shoulder of the bridge to a positive conclusion, through loading arrives on the left lower shoulder and returns to network. During a negative half-cycle (a large stroke a dotted line) current flows on other pair of diodes of the vypryamitelny bridge. Here Tr. – the transformer, lowers tension from 220 to 42 Volts, galvanic divides high and low voltage. Д – the diode bridge, straightens the alternating voltage which arrived from the transformer. Figure 1 designated primary (network) winding of the transformer, figure 2 designated a secondary (output) winding of the transformer.
3. Connect to primary winding of the transformer a network cord with a fork. Two wires connect two conclusions of a secondary winding of the transformer to two entrance conclusions of the diode bridge. "Minus" solder a conclusion of the diode bridge with marking to a negative conclusion of the condenser.
4. A negative conclusion of the condenser is designated on its case by a light strip with the sign "minus". Solder a wire of blue color to the same conclusion. It will be the negative output of the rectifier. Solder a conclusion of the diode bridge with the sign "plus" to the second conclusion of the condenser together with a wire of red color. It will be a positive conclusion of the rectifier. Before inclusion carefully check correctness of installation – mistakes are not admissible here.