Post History
Hi, I built a constant current load following the circuit from https://www.instructables.com/id/DIY-Constant-current-load/ But my op amp gets destroyed after a few minutes. The transistor or the op...
Question
opamp
#4: Post edited
by
timelyfiasco
·
2020-08-18T01:42:38Z (over 4 years ago)
link changed
Hi, I built a constant current load following the circuit from [https://www.instructables.com/id/DIY-Constant-current-load/](DIY-Constant-current-load)- But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time.
- Am I at fault or is the circuit wrong? Tested at 10V 0.5A.
- 
- P.S. It is working again as of now. But still I have destroyed a couple op amp.
- Is there a better circuit design? Like mentioned here [https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit](https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit)
- Hi, I built a constant current load following the circuit from https://www.instructables.com/id/DIY-Constant-current-load/
- But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time.
- Am I at fault or is the circuit wrong? Tested at 10V 0.5A.
- 
- P.S. It is working again as of now. But still I have destroyed a couple op amp.
- Is there a better circuit design? Like mentioned here [https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit](https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit)
#3: Post edited
by
timelyfiasco
·
2020-08-18T01:40:39Z (over 4 years ago)
changed link
Hi, I built a constant current load following the circuit from [http://www.instructables.com/id/DIY-Constant-current-load/](DIY-Constant-current-load)- But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time.
- Am I at fault or is the circuit wrong? Tested at 10V 0.5A.
- 
- P.S. It is working again as of now. But still I have destroyed a couple op amp.
- Is there a better circuit design? Like mentioned here [https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit](https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit)
- Hi, I built a constant current load following the circuit from [https://www.instructables.com/id/DIY-Constant-current-load/](DIY-Constant-current-load)
- But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time.
- Am I at fault or is the circuit wrong? Tested at 10V 0.5A.
- 
- P.S. It is working again as of now. But still I have destroyed a couple op amp.
- Is there a better circuit design? Like mentioned here [https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit](https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit)
#2: Post edited
by
timelyfiasco
·
2020-08-17T03:41:39Z (over 4 years ago)
- Hi, I built a constant current load following the circuit from [http://www.instructables.com/id/DIY-Constant-current-load/](DIY-Constant-current-load)
- But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time.
- Am I at fault or is the circuit wrong? Tested at 10V 0.5A.
- Hi, I built a constant current load following the circuit from [http://www.instructables.com/id/DIY-Constant-current-load/](DIY-Constant-current-load)
- But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time.
- Am I at fault or is the circuit wrong? Tested at 10V 0.5A.
- 
- P.S. It is working again as of now. But still I have destroyed a couple op amp.
- Is there a better circuit design? Like mentioned here [https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit](https://electronics.stackexchange.com/questions/371864/constant-current-load-op-amp-ref-voltage-limit)
#1: Initial revision
by
timelyfiasco
·
2020-08-17T03:36:35Z (over 4 years ago)
Constant Current Load Circuit with Op Amp
Hi, I built a constant current load following the circuit from [http://www.instructables.com/id/DIY-Constant-current-load/](DIY-Constant-current-load) But my op amp gets destroyed after a few minutes. The transistor or the op amp didnt get hot to the touch. After replacing the op amp the circuit works again for a short time. Am I at fault or is the circuit wrong? Tested at 10V 0.5A. 