When you take the key card out (or just slide it a little out not removing it completely from the slot) you will see the real temperature not only the set temperature. With the key card pushed completely in you only see the set temperature and the dot is telling you when it is heating up.
I am working on an improved firmware where the original controller is replaced with a Arduino Nano. But that will take probably still some months because ATM I barely have a minute of time for that project. When it´s ready to show I will make a video aout it.
awesome vid . have you found what op amp fits to replace the lm358 ? and what r7 resistor would be best i would like to up grade mine may be a vid on the adjustments and fitting please thank you
I didn´t give up but have this project delayed (until forver?) due to time constraints. I got so far that the 3-digit display is controlled, the temperature is measured and the iron is switched on and off. But I didn´t have the time to work out a control-loop and have the extra-functionallty of the original Hakko-station implemented.
It was not necessary to measure the current because the heating element is purely resistive. So the power could be directly calculated from the RMS output voltage via Ohm´s law for power: P=(V*V)/R And current can be also calculated by Ohm´s law: I=V/R From memory I think the resistance of the tips (when hot) was 8 Ohms.
When you take the key card out (or just slide it a little out not removing it completely from the slot) you will see the real temperature not only the set temperature. With the key card pushed completely in you only see the set temperature and the dot is telling you when it is heating up.
Did you make another video with improvements on the hakko I couldn't see anymore videos?
I am working on an improved firmware where the original controller is replaced with a Arduino Nano.
But that will take probably still some months because ATM I barely have a minute of time for that project.
When it´s ready to show I will make a video aout it.
awesome vid . have you found what op amp fits to replace the lm358 ? and what r7 resistor would be best i would like to up grade mine may be a vid on the adjustments and fitting please thank you
Roger, did you ever finish working on the Nano MCU replacement, or did you finally give up on this one?
I didn´t give up but have this project delayed (until forver?) due to time constraints. I got so far that the 3-digit display is controlled, the temperature is measured and the iron is switched on and off. But I didn´t have the time to work out a control-loop and have the extra-functionallty of the original Hakko-station implemented.
But the transformer how much power have .
Great project!, I wish the stands for the 951 were not so crappy looking, they look cheap
Hi what is the Maximum current out of this circuit? did you test current out ?
It was not necessary to measure the current because the heating element is purely resistive.
So the power could be directly calculated from the RMS output voltage via Ohm´s law for power: P=(V*V)/R
And current can be also calculated by Ohm´s law: I=V/R
From memory I think the resistance of the tips (when hot) was 8 Ohms.