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Old 02-07-2008, 03:21 AM #1
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Default WTB: SMT SMD low Ohm Current Sense Resistors

I am looking for some SMD 1206 or 0805 resistors
0.15 Ohm
0.39 Ohm

anyone want to sell me a few? or knows where to buy those for cheap. I could not find them on eBay or
http://www.vakits.com/index.php?cPath=111_112.


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Old 02-07-2008, 06:03 AM #2
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

Why not 1 or 0.1 ohm? Would be way simpler that way...
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Old 02-07-2008, 06:23 AM #3
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

I try to modify the existing drivers with these valus.

The Dorcy driver puts out 340mA using the 0.33 Ohm resistor, after I replaced the 0.33 Ohm with 0.25 Ohm it puts out 360mA. I would like to see the Dorcy puts out 420mA for Open Can diode and maybe 250mA for 16x diode.
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Old 02-07-2008, 08:04 AM #4
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

so, you don't actually want them for current sensing... you want them to adjust current. If you don't know whether a particular resistor exists, not being able to find it is probably an indication that it doesn't exist. Try a pot somewhere or maybe even combine a few resistors (just google 'parallel resistor calculations') to get the desired result.
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Old 02-07-2008, 04:36 PM #5
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

Quote:
Originally Posted by BlueFusion
so, you don't actually want them for current sensing... you want them to adjust current. If you don't know whether a particular resistor exists, not being able to find it is probably an indication that it doesn't exist. Try a pot somewhere or maybe even combine a few resistors (just google 'parallel resistor calculations') to get the desired result.
These resistors do exist, but the kits cost $50. The pot would be ideal if they can do 0.1 Ohm ~ 1 Ohm. I still need low Ohm resistors to run them in parallel.
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Old 02-07-2008, 07:59 PM #6
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

hey monk try www.mcminone.com or digikey or buy the new dorcy's they put out around 415ma
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Old 02-07-2008, 08:01 PM #7
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

or buy 0 ohm smd resistors they are really 0.2 ohms
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Old 02-08-2008, 04:12 AM #8
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

Quote:
Originally Posted by toked323
or buy 0 ohm smd resistors they are really 0.2 ohms
I removed a 0 Ohm resistor from DVD circuit board and measured using digital Ohm meter set to 200 Ohm (lowest settings) I got 0.1 Ohm. I then used an analogue meter set to RX1, I got 0 Ohm.
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Old 02-08-2008, 07:39 PM #9
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Default Re: WTB: SMT SMD low Ohm Current Sense Resistors

there is no such thing as 0 ohm though it just has extremely low resistance that it doesn't really make a difference mine measure 0.2ohms
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