K8055 and K8067 Temperature sensor callibrating Problem

Kits PC Related Projects
1

Hi,
Can anyone give me some tips to callibrate the K8067.
Setup :
1x K8055 kit no external powersupply
1x K8067 kit 12V powersupply

I attached 4x 1K resistors in parrallel at the input A1 and GND
Max 5 V on the pot-meter RV1 on board K8055 and no jumper SK2 (External powersupply).
Adjusted the temperature with T1 on the K8067.
With the 4 resistors, the reading is much more stable but after a while (30min) it starts to flicker up and down 5 degrees.

I also can’t connect to the card when I use jumpers on SK5 and SK6
Is it possible to feed the card also with the 12 V powersupply?

Any Idea?

2

[quote]Is it possible to feed the card also with the 12 V powersupply?[/quote]This is not possible. The K8055 is supplied from the +5V of the USB connector of your PC. Do not connect external power supply to the K8055 !

[quote]I also can’t connect to the card when I use jumpers on SK5 and SK6[/quote]This is very strange. Can’t use the address 0 but you can use other addresses (1 to 3)?
Note: When changing the jumpers SK5 and SK6 the USB cable must be disconnected from the PC.