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My Arduino sensor system

The Arduino microprocessor is a cheap piece of hardware that can be purchased at every well equiped electronics store.
The easiest way is to search on the Internet and buy one on-line.
They are mostly ofered in packages, mostly referred to as " Starter Kit", along with electronic components such as temperature dependend resistors, light dependend resistors, common resistors of evry kind and a so called "Breadboard" on wich you can build your sensor system without problems.
For example, my first kit contained (and cost approx. 77 Euro):

  • 1 Straight single line pinhead connectors 2,54 36x1
  • 5 10K Ohm Resistors 1/4W
  • 5 2.2K Ohm Resistor 1/4 W
  • 10 220 Ohm Resistors 1/4W
  • 5 330K Ohm Resistors 1/4W
  • 5 100nF capacitor polyester
  • 5 10nF capacitor polyester
  • 3 100uF electrolytic capacitor 25Vdc
  • 1 4,7K Ohm Thermistor
  • 1 70..100K Ohm LDR VT90N2
  • 3 5mm RED LED
  • 1 5mm GREEN LED
  • 1 5mm YELLOW LED
  • 1 10Kohm linear potentiometer, pcb terminals
  • 2 BC547 Transistor in TO92 Package
  • 1 Piezo buzzer
  • 5 PCB Pushbutton, 12x12mm size
  • 2 4N35 Optocoupler DIL-6 package
  • 2 Tilt sensor
  • 1 Diode 1n4007
  • 1 MOS Irf540

Resistors are coded with colored bands. To see what code you need I found  this website very useful:
Resistor Code Calculator

If you want to follow my demo, be sure that your kit has at least a temperature dependend resistor (called Thermistor or NTC) and a light dependend resistor (called Photocell or LDR), and a couple of resistors in the range from 10 to 100K Ohm.
Then follow the installation schedule below:
The Arduio sensor board.

  On the left you see the blue Arduino board.
On the right, on the white breadboard, yu see the two sensors.

    The left sensor, with the knob with the reddish color is the temperature dependent resistor (NTC) and at the right you see the light dependend resistor.
The NTC and the LDR are both set with a 10K Ohm resistor)
(Note that the picture is turned around to show the resistors better.)

First strap the Arduino onto one side of the breadboard with a rubber band, or any other non-conducting material.
Then connect the LDR in serial connection with the 10K Ohm resistor.
Next connect the NTC in serial connection with another 10K Ohm resistor.
Now connect the Arduino with the conductors on the side of the breadboard wich are marked with a blue and red line.

    Connect the sensors with the Arduino.

The Arduino connections called:
Power 5V to the Blue conductor strip.
GRND (=Ground) to the Red conducto strip.

The A0 (Analog 0) to the LDR where the LDR and the 10K resistor are connected.
Now connect the LDR end of this LDR circuit with the
blue conductor and connect the 10K resistor end with the red conductor.

The A1 (Analog 1) to the NTC, again, where the NTC and the 10K resistor are connected.

Now you have two sesors mounted on one Arduino breadboard.
You are done with the hardware; Congratulations.

Next: program the Arduino to read the sensors and send the data to your DNN portal.