Rick Williams - VE7TK
I am having some problems with the TEMP1 and TEMP2. The temperature device I am using is a TMP36 (TMP36GT9Z).
When I put the TMP36 on my bench supply at 5 VDC at a temperature of approximately 21C it indicates the correct Vout of 710 mV. When I plug the same device into the clock it reads 680 mV or about 18C. (The supply voltage is unchanged at 5VDC.)
As expected, when I place a finger on the TMP36 the displayed temperature and Vout go up/
It looks to me like something is loading down the TEMP1 and 2 pins when the TMP36 is plugged into the clock board?
Has anyone experienced this? Thanks!