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Soldering Iron Controller for Hakko 907 v.2

Project tutorial by Alexander

  • 69,819 views
  • 233 comments
  • 126 respects

  • Soldering Iron Controller for Hakko 907 v.2 over 3 years ago

    Please, post the errors. So that we can provide the solution.

  • Soldering Iron Controller for Hakko 907 v.2 almost 5 years ago

    Yes it does , its actually a cheap and best replacement that I have found.
    MCP602 costs only around 60INR but for shipping I paid 90INR that is around

    2.5 USD. Where as the ad822 costs more than 6USD including shipping.
    Sorry For the very long delay.

  • Soldering Iron Controller for Hakko 907 v.2 about 5 years ago

    Voltage gain of an non inverting opamp is 1+Rf/R1= output voltage / input volt.
    i.e, 1+ 220K/10K = 4v / thermocouple volt.
    which gives thermocouple voltage to be approximately equal to 173mv at 250C.
    Among all the 7 types of thermocouple none of them has such high output voltage even at 500C.
    so i think there is a problem in your sensor circuit.

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