Hello i have Velleman’s kit K8055 and i connect with the temperature sensor K8067.I want to check the temperature in a small greenhouse.Although the temperature in greenhouse change from 24 to 28 or 30 degrees in my laptop on the demo programm i have it doesnt seems to change the temperature.I have used exactly the connection that the instuctions said.I have used only one resistor but i dont know if i should use 2.Do you know what i have make wrong so that i cant see the changes of temperature in my laptop?
Have you checked the output voltage from the K8067 with a multimeter and noticed the voltage variations according to the temperature?
Have you removed the ‘test’ jumpers SK2 and SK3 and turned the trimmer potentiometers ATT1 and ATT2 to max position clockwise?
i have found the solution.i forgot to connect the transformer with the sensor.I have a transformer connected with a water canon and i connect this transformer also with the sensor but it didnt work.So i bought a new transformer and connected with the sensor and worked
One more question i found a equalization in the sensor (101 * AD) /256 -23=temperature but i dont know what is -23