Controlling impedance (resistance) is almost a given with today’s technology. One day, we are adding a wireless option to a common object and calling it the Internet of Things. The next day, we’re simply keeping up with the competition on processing the code. Days go by and the trend ...
Its circuit is shown in the figure below. It consists of three components: G is an ammeter with internal resistance ofRgand full bias current ofIg. R is a variable resistor, also called a zero-regulated resistor. The battery has an electromotive force of E and an internal resistance ofr. ...
A resistance tool uses two probes that can look like rods, pliers or tweezers. These probes pass a current through the solder. The probes and the solder heat up very quickly because of their resistance to the current passing through them. Removing the solder breaks the circuit, and the tips...
Figure 3 shows the simple implementation of a TVS diode to protect a downstream circuit. Under normal operating conditions, the TVS is high impedance and the input voltage simply passes to the output. When an overvoltage condition occurs at the input, the TVS becomes conductive and responds by...
Figure 4: For module measurement using a CT, the load wire (black in the US), is passed through the opening of the CT either via a split core CT or cutting/re-splicing the wire. The leads from the CT are then connected to the AI+ and AI- of the measurement module. The module wi...
or material as the connector on the switch module. Such cables improve isolation of the signal path and thus reduce errors induced by cross talk from neighboring sources. Lastly, try to choose a switch module that has low thermal emf (less than 5 μV) and path resistanc...
When tuning a probe, the pulse response of the scope should be observed first in order to match the probe response to that of the directly connected scope input. Figure 6 shows the pulse response of a PicoScope 3206B 200 MHz oscilloscope without a probe connected. The input pulse has a ...
As RW joints are forged during the process, take care to control the amount of force applied. Insufficient force results in expulsion (sparks), while excessive force reduces the interface resistance and can result in a cold weld. As previously noted, set weld time as short...
As explored below, the glowing filament in an incandescent light bulb allows us to view resistance in action. PhotoLink/Photodisc/Getty Images As mentioned earlier, the number of electrons in motion in a circuit is called the current, and it's measured in amps. The "pressure" pushing the...
Semiconductor devices can display a range of useful properties, such as showing variable resistance, passing current more easily in one direction than the other, and reacting to light and heat. Their actual function includes the amplification of signals, switching, and energy conversion. Therefore, t...