Dear all,
i want to use a 100k NTC on my custom PCB, just because it is on stock here.
I change the second resistor to 100k too and modified the defines to the new Values and B Value
// NTC Termistors
#define NTC_RES(adc_val) ((4095.0 * 100000.0) / adc_val - 100000.0)
#define NTC_TEMP(adc_ind) (1.0 / ((logf(NTC_RES(ADC_Value[adc_ind]) / 100000.0) / 4380.0) + (1.0 / 298.15)) - 273.15)
is this correct ? at 20° C it looks good, but i don't trust other values at the moment
Regards
Georg
Hold it against an icecube and in boiling water. Those are easy temperatures to verify it against.
Yes, of course, but it is glued to the pcb...
I will try it with a new pcb... Thanks
If you have it "in stock" it is easy to try another one against the icecube and boiling water...