Lm317 Milliohm Meter Schematic. The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic. The lm317 device is an adjustable three terminal positive voltage regulator capable of supplying more than 1 5 a over an output voltage range of 1 25 v to 37 v.
Lm317 based as either current or voltage sources at least in my. I recommend the lm317lz which is the 100 ma t0 92 version of the normal lm317. Using lm317 and 2n3055 so easy and cheap.
So you need a very accurate milli amp meter to adjust this correctly.
But you can also use the lm317 in the t0 220 package if you want. The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic. With my tester i can detect resistance down to 002 003 ohms. For access to milliohmeters you either have mohm accuracy and repeatability or you do not.
