User manual

How to interconnect the other E-Kits with the twilight switch?
First, the E-kit “Interior Lighting for Buildings” (order number 60270) is suitable to be applied by a Twilight Switch. After nightfall one or more buildings come to life. For this, the
Interior Lighting for Buildings won’t be powered directly to power, but the power supply will be turned on and off by the relay. Like in the original, of course the road lighting and the
platform lighting can be switched by the other relay contact. With one or more E-Kits “Servo with controls” (order number 60273) certain attractions can be switched during nightfall.
Also here, a changeover switch of the relay has to be switched into the service pipe(s) of the E-Kit “Servo with Controls”. E.g. for nocturnal railway works or for nocturnal loading and
unloading. You can use the second relay contact for the construction site light.
Where I can show my own installation of the E-Kits?
www.mymocom.com is a platform for all model railway enthusiasts. There you can share your ideas about the installation and what it can switch with the others.
How does the switch (hardware) work exactly?
The switch board consists of:
• Microprocessor
• power supply
• entries and outlets
The microprocessor operates the stored program (software) line by line and so it can check the entries and regulate the outlets (relay).
The central element is the microprocessor. The detector, the capacitors and the voltage regulator arrange a reliable power supply of the microprocessor.
The small components with the signature are resistors, which are soldered on the plate for the single entries and outlets of the microprocessor. So that a relay can be switched by the
microprocessor, a transistor is included in the board.
What’s a LDR?
LDR stands for Light Dependent Resistor. Such a Light Dependent Resistor serves as a sensor for the ambient light. The stronger this resistance is illuminated, the lower electric
resistance. Exactly this resistance is change is evaluated by the microprocessor and switches the relay.
What’s a hysteresis?
If the LDR is shaded, the relay turns on the bulb after a certain barrier. If the ambient brightness will be turned up, the relay turns out the bulb in a different ambient brightness. This
difference is called hysteresis.
This is applied by the microprocessor, which can recognize, if it shall turn on or off the relay by the values of the resistance of the LDR. The respective values for the switching on and
off are different. In this way the hysteresis occurs. Of course you can create a Twilight Switch without this shifter shaft. But in this case, the lamp flutter at ambient brightness which is
near to the shifter shaft. Without the hysteresis the switch near to the shifter shaft reacts even to the slightest changes.
What are the special elements of this microprocessor?
Every microprocessor has to be supplied with a pulse for implementing the program. For this, a lot of computers use an extern oscillating crystal. But this small micro computer has
installed a small intern pulse generator. All things which are needed for a solution of a simple control task are implemented in only one computer chip. You only need to know 33
commands to code a microprocessor.
How does the saved program (software) work exactly?
First, the computer tests the entry SW. Here, it’s tested, whether the first or the second program will be used. Now the value of the light dependent resistor is polled. If this value is
greater than a predetermined reference value, the relay will be switched. But is the value is smaller than a predetermined reference value, the relay will not be switched. Both values for
switching on and off are different. Like this the hysteresis was programmed. If both values are identical, there’s no hysteresis.
Where I can find further information?
The manufacturer of the chip is a good resource to learn more about the microprocessor which is used here. On the website www.microchip.com you will find quickly something by
searching the used microprocessor. Enter “PIC10F200” in the search box “Search Data Sheets”. The data sheet of the microprocessor comprises approximately 100 pages. Here the
small microprocessor is described in detail.
NOCH GmbH & Co. KG
Lindauer Straße 49
D-88239 Wangen im Allgäu
Tel.: +49 - 75 22 - 97 80-0
Fax: +49 - 75 22 - 97 80-80
E-Mail: [e-mail]
www.noch.de und www.noch.com
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