Hello,
Please view attachment OPAMP1. Here is a circuit that works exactly as I need it. This circuit was kindly provided to me by some fellows from this site. The last piece of the puzzle is I need to control R5 from my MCU. I would like to know if R5 can be replaced with a JFET as shown in OPAMP2 attachment. Obviously I would add a 5 ohm resistor in series with the FET... (Not shown).
I have not had time to seriously study and learn passives such as opamps JFETS and Triacs yet... I don't know if the calculations to select the correct JFET are complex or even if this circuit can be done with an JFET...
I apologize for asking help like this... but at this point any help is very appreciated...
thanks
Please view attachment OPAMP1. Here is a circuit that works exactly as I need it. This circuit was kindly provided to me by some fellows from this site. The last piece of the puzzle is I need to control R5 from my MCU. I would like to know if R5 can be replaced with a JFET as shown in OPAMP2 attachment. Obviously I would add a 5 ohm resistor in series with the FET... (Not shown).
I have not had time to seriously study and learn passives such as opamps JFETS and Triacs yet... I don't know if the calculations to select the correct JFET are complex or even if this circuit can be done with an JFET...
I apologize for asking help like this... but at this point any help is very appreciated...
thanks
Last edited: