sfrwmaker / soldering_907_lcd Goto Github PK

Hi there, I was looking for a project that can resurrect my old and broken Aoyue 701 desoldering gun. Original heater element has 4 wires (2 for resistor and 2 for thermocouple) but newer replacement comes only with 2 wires so thermocouple is wired in parallel with heater. I also checked that applying heat externally with hot air and measuring mV on wires.

My question/request is if can modify somehow your circuit to use this kind of heating elements.

I tested this heating element with a cheap t12/jbc/936 chinese clone solder board And apparently works but when reaching +-300ºC controller goes crazy and never stabilizies temp.

The approach I think is to make readings between pwm pulses to not get heater voltage over thermocouple.

Thanks in advance!

please support oled 0.96 or 0.91.
lcd 1602 or 0802 with 7805 is so hot