11 Gauge Wire...where?
 

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

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

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

Then how about this!!

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

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

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.

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.