11 Gauge Wire...where?

[Matt Krass]

Hey all,

My team and I are working on a custom electronic circuit and we need some 11 gauge wire, anyone know where we can buy it? I've been checking the web, but can't find it anyway...Thanks,


Matt

[Matt Reiland]

Why not go to 10 or 12 since they are the normal gauges? Resistance?

[Matt Krass]

Rather not, we need the 11, it is the perfect resistance for this project. Thanks anyway.

[Matt Reiland]

Then how about this!!

http://www.partsexpress.com/pe/showd...roduct_ID=2871

[Joe Ross]

how do you know that 11 AWG wire has the perfect resistance if you don't have any?

[Al Skierkiewicz]

All,
There is no commonly available #11 wire. If you need a specific ohmic value of wire, consider making a longer length of #10 wire. If this is not practical you can take a #10 wire of many strands and remove strands until you reach the specific ohmic value you need. However, you need a special type of ohmmeter to measure accurately below one ohm. Exactly what are you trying to accomplish. If your are worried about giving something away, contact me with a private message and I will try and answer privately.

[Lloyd Burns]

The furniture indusry uses 11-ga hardenable wire to make sinusoid zig-zag springs. Some of the bending machine manufacturers list the automotive industry as buyers of the products of their machines. The other size in common use appears to be 8-1/2 ga. :-)

As to current shunts, make a shunt which is longer than you need, calibrate (use an ammeter to show the current), measuring the voltage between two points on the shunt, attaching take-off wires at the points. I used this to measure motor current with a voltmeter, at 10 A = 100 mV.

Alternately, use something close to your shunt design, and send the signal through an op-amp: send a known current through the shunt, and adjust the output to make it give the size of output you want, for example 20 mV/A. With an op-amp, you can even set the zero to 2.5V, or 127 on an analog input, by adjusting the offsset (bias), even measuring a signal not far from ground.