Hey Guys!
I wonder if the pencil trick whould also work to “adjust” VSense Resistors?
how many mOhm could a 3mm long line have?
(thin, hard Pencil)
thanks!
Martin
Good question. I just tried that and read a couple of kilo-Ohms (1.5-4 KOhms) on a very short pencil line with 2B mechanical pencil lead.
So definitely not going to significantly reduce the resistance of the sense resistor.
What surface did you use? People who use those conductive circuit drawing pens report higher resistance when using absorbent paper vs less absorbent paper.
Just plain A4 paper, nothing special. 75g/sq. m I believe.
could you draw on a side resistor?
The resistance for pencil trace is in the k-ohms for the surface area we’re talking.
Even if we get 2kohm per surface, and draw on the sides and they’re all connected perfectly, you get 600-700ohms in parallel which is still practically useless. The limiting resistor is in sub-ohm, thus you you gain nearly nothing in current draw.
I see - thanks!
i googled around an found that Conductive Silver Lacquer has 20-100 mOhms when compared with 0,5 mOhm of Copper…
(i use that to connect the stars on PCB)
can anyone try that?