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BLOCK SYSTEM FOR ELECTRIC TRAINS MINIATURES

BLOCK SYSTEM FOR ELECTRIC TRAINS MINIATURES

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  IDEA ELECTRONIC PROJECT

BLOCK SYSTEM FOR ELECTRIC TRAINS MINIATURES

This assembly is a protection unit for preventing a train to join another drive train slower.
The power supply 14 is provided in V

NOMENCLATURE
1 - PCB
1- transistor BD 138 BD140 =
BC318 BC547 transistors 2 =
1-transistor 2N2907
2-diodes IN 4004 = 4007
1- LED red diam. 3mm
1- LED diam green. 3mm
1- resist. 150R (brown-green-brown)
1- resist. 220R (brown-red-brown)
2- resist. 330R (orange-orange-brown)
2- resist. 1.5K (brown-green-red)
1- 3.3K resistor (orange-orange-red)
1- 100K resistor (brown-black-green)
1- welding
1 thread

DIAGRAM
the way we tronçorme into sections called "cantons". The system block connects to two consecutive blocks as follows:
exit "S" is connected to the positive rail of Canton 1 (the first in the direction of travel of trains). This is the positive power of the township will be cut off when another train runs on the next block. - The entry "E" will be connected to the positive rail Township No. 2 this cormexion detects one hand the presence of a motive in the relevant canton, and also feeds the canton (through both = 1N4004 1N4007 diodes. so do not connect other power supplies son on track considered. In normal operation the green LED is on, the red LED lights up when the system is block.
PS: in the bag it comes two BC 547 instead of two BC 318, attention, 2 547 BC SHOULD THE ROTATE TO 180 ° C in the direction of the clock hand

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