Conrad Thermostat Variable Temperature Switch Kit With Sensor 192082 Data Sheet

9.  When soldering semi-conductors, LEDs and ICs special attention must be 

paid to the fact that the soldering time does not exceed approx. 5 seconds, as 
otherwise the component gets destroyed. Similarly, attention must also be 
paid to the correct polarity in case of these components. 

10. After mounting, check each circuit once again to see that all components are 

inserted correctly and polarised. Also check, whether the connections or 
conducting pathways have not been bridged by mistake with tin. This can not 
only lead to faulty functioning, but also to a damage of the expensive 
components. 

11. Please note that improper solder joints, false connections, improper usage 

and mounting faults are outside of our influence. 

Mounting the components on the printed circuit board 

First, the connection wires of the resistors are bent at right angles conforming to 
the contact spacing and inserted in the openings provided (as per the component 
diagram). In order that the components do not fall out when the board is turned 
over, bend the connection wires of the resistors away from one another at an 
angle of approx. 45°, and then solder them carefully with the conducting 
pathways on the rear side of the printed circuit board. Thereafter, the excess 
wires are cut away. 
Note that this circuit is equipped with two different types of resistors. The 
commonly used resistors are the carbon film resistors. 
They have a tolerance of 5% and are marked by a gold-coloured “tolerance ring”. 
Carbon film resistors normally have four coloured rings. 
Metal film resistors have a tolerance of just 1%. This is shown by a brown 
“tolerance ring”, which is imprinted a little broader than the remaining four colour 
rings. This is meant to avoid a confusion with a normal “value ring” having the 
value of “1”. For reading the colour code the resistor is held in such a way that 
the coloured tolerance ring is present to the right of the body of the resistor. The 
coloured rings are then read from left to right! 
R1 = 4k7 = yellow, violet, red 
R2 = 10 k brown, black, orange 
R3 = 1 k = brown, black, rot 
R4 = (trimmer potentiometer 10 k) 
R5 = (trimmer potentiometer 10 k) 
R6 = 2k4 = red, yellow, black, brown (metallic-film) or red-yellow, red 
R7 = 1 k = brown, black, red 
R 8 = 22k red, red, orange