MrDEB
Well-Known Member
Have this schematic for a Hakko temp soldering iron and tried simulating using TINA but see no output change from 2a (between r14 and d1. Thinking this is what controls the on/off of the iron heater via the triac controller.
Am just simulating the three left side op amps seeing how u1c is the power supply.
perhaps LT spice would show correct simulation outputs. I have trouble w/ op amps in LT spice.
Even a description of this circuit operation.
I found that the sensor at room temp is 50 ohms. At the point of solder melt it is 180 ohms.
I have parts on order as well as a pcboard.
Here is the link to the schematic
Am just simulating the three left side op amps seeing how u1c is the power supply.
perhaps LT spice would show correct simulation outputs. I have trouble w/ op amps in LT spice.
Even a description of this circuit operation.
I found that the sensor at room temp is 50 ohms. At the point of solder melt it is 180 ohms.
I have parts on order as well as a pcboard.
Here is the link to the schematic