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Project logs / Re: Simple Soldering Iron Driver (SSID) with Arduino PID Con

August 20, 2014, 09:48:47 pm

LM358 can be powered from arduino or external 5V supply ?

if it fails the distortion at the output of operational amplifier

I did not notice and I got a short circuit on OA, arduino received 9V / 19V to A1 and Arduino is destroyed :(

Project logs / Re: Simple Soldering Iron Driver (SSID) with Arduino PID Con

May 19, 2014, 03:23:55 pm

ok thx

i find for K-type=41,276μV/°C and for E-type=76.373μV/°C

I tested with known melting point cca 183°C with 41uV/°C on program, is approximately to 99.7 correct setting

great work

Project logs / Re: Simple Soldering Iron Driver (SSID) with Arduino PID Con

May 17, 2014, 01:31:02 am

Hi,

for K-type thermocouple:

240°C = 9.84mA

240-25=215 0.00984/215=4.576744E-5(0.00004576744)

this is correct?

thx for reply

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