Modifying resistors on the board

A

almondcity

Well-known member
Has anyone here ever soldered another resistor to one already in place?

I'd like to modify one value without taking it out of the box. In my mind I can simply solder another one on in parallel to lower the value, but it has the potential to go wrong

Thoughts?
 
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I do it all the time when prototyping. Just add a little more solder than normal to each end of the resistor that's already in the board, then you can fairly easily tack another one across it in parallel.
 
I do it, too.

I'm mathphobic, so I use this online calc:

I'm also lazy. It's actually a pretty easy formula to calc:
resistrs.gif



Handy for calculating series capacitors, too.
 
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