Jay.slovak
Active Member
Hi guys,
I don't have suitable soldering station and because SMD PCBs are so easy to make with Press-n-Peel I have decided do get new, temperature controlled soldering station. I was looking for one with basic functions (just R/G LED indication and one potentiometer) but all costed $60+ and I am not willing to spend so much!
Then I realised I can build my own, for 1/3th of the price, so I bought $15 24V/48W Pro's kit spare soldering iron, with thermojunction temperature sensing.
The thing is I am looking for a way how to correctly feed this thermojunction output to the PICs ADC (16F88 or 18F1320 - to be decided). It's output is at 0.2mV @ room temp and approx. 50mV @ full power (don't know exact temperature). I was thinking of single non-inverting OPamp solution with Gain=50. Is this OK? I am not an expert when it comes to OPamps (eg will Offset voltage be a problem?).
Thanks for all constructive comments!
I don't have suitable soldering station and because SMD PCBs are so easy to make with Press-n-Peel I have decided do get new, temperature controlled soldering station. I was looking for one with basic functions (just R/G LED indication and one potentiometer) but all costed $60+ and I am not willing to spend so much!
Then I realised I can build my own, for 1/3th of the price, so I bought $15 24V/48W Pro's kit spare soldering iron, with thermojunction temperature sensing.
The thing is I am looking for a way how to correctly feed this thermojunction output to the PICs ADC (16F88 or 18F1320 - to be decided). It's output is at 0.2mV @ room temp and approx. 50mV @ full power (don't know exact temperature). I was thinking of single non-inverting OPamp solution with Gain=50. Is this OK? I am not an expert when it comes to OPamps (eg will Offset voltage be a problem?).
Thanks for all constructive comments!