Electronics > Beginners
constant current source design
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Zero999:

--- Quote from: Arjunan M R on June 03, 2019, 01:45:48 pm --- ; Thanks. How did you measure current vs voltage.

--- End quote ---
Try looking at the .asc files he attached to the posts in the thread he linked to.
https://www.eevblog.com/forum/projects/minimum-load-circuit-for-lab-psu/msg2439099/#msg2439099
Jay_Diddy_B:

--- Quote from: Arjunan M R on June 03, 2019, 01:45:48 pm --- ; Thanks. How did you measure current vs voltage.

--- End quote ---

Hi,

First I assign a fixed value to the source that I want to sweep. I have set the value of V2 to 1V dc:



Then in the SIMULATE menu:



I select DC sweep. I have set V2 to step from 0 to 1V in 5mV increments.

I run the simulation.

When the simulation stops. If I [ALT] [LEFT CLICK] on a wire, I can plot the current in that connection.

(If I ever make to India, you owe me a cup of tea  :D)

Regards,

Jay_Diddy_B
Arjunan M R:
Thanks for all your replies.
How did you insert picture in middle of text?
Zero999:

--- Quote from: Arjunan M R on June 03, 2019, 02:31:39 pm ---Thanks for all your replies.
How did you insert picture in middle of text?

--- End quote ---
Attach the image and post as normal.

Click on the image to increase its size. Copy the image address to the clipboard. Different browsers have different procedures. In Firefox, right click on the image and click "copy image location". Click on modify to edit the post. paste the image address between [img][/img] tags.

Click on the "quote" button on Jay_Diddy_B's post to see how he did it.

Refer to this thread: https://www.eevblog.com/forum/chat/how-to-include-images-in-a-post/msg298323/#msg298323
Arjunan M R:
If I use matched pair transistors does i have to use emitter resistors?
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