If youre new to electronics, when you hear resistor, youre probably thinking of a little 1/4 watt beige device with some colourful bands indicating the value. The wiring should then feed from the shunt to the load. mrpendent has added a new project titled the C.A.T.. mrpendent has updated the log for The Grimoire Macropad. ADR4533 is an ultralow-noise, high-accuracy 3.3 V voltage reference When incursive is no longer taught, who knows Wait, maybe I do not want to hear this answer? Many applications require a constant-current source that is stable over supply drift, temperature drift, and output variations. Shunt resistors are used to load a current-source like some transformers and are always connected parallel to the secondary/load. Subscribe today! This enables the current to flow to an alternative point in the circuit. Armed with a suitably sensitive voltmeter, its possible to measure large currents relatively safely something not achievable with the average multimeter. The level of power that the resistor must dissipate is expressed in terms of the Power Coefficient of Resistance (PCR) or ppm/W. 1Resistance stability is affected by humidity, but changes are reversible. Do not connect non-isolated test equipment to a shunt used to measure AC mains. For these reasons, the current shunt resistance should be as low as possible. There shouldnt be any connection between the ammeter and the ground. As an example, consider a microcontroller used to control a DC motor with a transistor controlled by a PWM output. The low phase shift error is critical for measurement of non-sinusoidal wave shapes, as found in power quality or sampling digital wattmeter measurement applications. Sweet, Thanks for the article on how CURRENT shunts work.