Volt-ampere method (also known as volt-measurement method, ampere-measurement method) is a common method of measuring resistance, by using partial circuit Ohm's law: R=U/I to measure the resistance value. Use the ammeter to measure the current through the unknown resistor at this voltage, an...
Jestine Yong’s How to Find a Burnt Resistor Value will teach you a secret method to find out the value of a damaged and unrecognizable resistor so you will never have to turn down a repair request just because you cannot figure out a single number that will let you know which replacement...
Caution:Before doing any work on a refrigerator or freezer, make sure it's unplugged. After unplugging the unit, check to see if the motor/compressor has a capacitor; this component is located in a housing on the top of the motor. Capacitors store electricity, even when the power to the ...
If this continues, the wires can overheat and start a fire. The circuit breaker's job is to cut off the circuit whenever the current jumps above a safe level. In the following sections, we'll find out how it does this. Breaker Design: Basic The simplest circuit protection device is ...
Since current always creates a magnetic field, there areHall Effectand other sensors that allow us to measure this field and thereby measure the current. It is also possible to connect a shunt resistor within the circuit itself and directly measure the current, as in the classic ammeter and cu...
Look at many of the large scale data breaches in the news -- the companies often did not discover the data leak or intrusion until long after the bad-actors were gone.Contrary to popular belief, bad-actors don't always want to change something or lock you out of your data for money. ...
Electrical soldering irons usually have a resistance heating unit, similar to what you would find in a hair dryer or a toaster. Electrical current passes through the heating unit, and electrical resistance causes the unit to get hot. It takes time for the heating unit to make the bit hot ...
If there is no pull-up or pull-down, input leakage current flows to the GPIO input pin. Please refer to the data sheet for this value. For example, in the case of P00.0, the pull-up resistor is between the terminal's power supply (VEXT for P00.0) and the P...
In fact, you can easily create your own intercom system using two telephones, a 9-volt battery (or some other simple power supply) and a 300-ohm resistor that you can get for cheap. You can wire it up like this: Your connection to the phone company consists of two copper wires. ...
For any application, consider all of the system parameters before choosing a given relay type. Using this information will allow you to make the appropriate tradeoffs for your application. Back to top Next Steps Learn about PXI switches