explains that the sum of the voltage drops around a closed circuit loop must equal zero. In a circuit with multiple electrical resistors, the voltage will drop at each resistor electrical joint. This can be useful if you need to obtain five volts from a 12-volt power source. ...
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, and then calculate the resistance of the unknown resistor. Volt-ampereresistance measurementis...
Ohm's law is an important mathematical formula that electricians and physicists use to determine certain measurements in a given circuit. The formula is: V=I×RV=I×R where V is the voltage, measured in volts, I is the amount of current measured in amps or amperage and R is the resistan...
Determining the resistor value for lighting LEDs is simple and straightforward, but we must take into consideration the color of the LED as well as the wattage rating of the required resistor, and the number of LEDs in the circuit. We hope reading How to Calculate Resistor Value for LED Ligh...
Step 3: Measuring the Voltage Across the Load Resistor Here is the tricky part, you have to complete this test as fast as possible, or else you might not get an accurate reading. I suggest to connect the resistance across the test lead of the multimeter, then make contact to the battery...
It is critical to determine the optimum value for the current-sense resistor (RSENSE). Larger RSENSEvalues increase the series IR voltage drop and power loss; however, this would also minimize the effect of the offset voltage error, as shown in Table 2. For designs that ma...
The low efficiency in Figure 3 suggests a significant power dissipation across the LDO regulator, a result of the large input-to-output differential voltage and load current. Equation 1 shows how to calculate power dissipation across an LDO regulator....
The best approach is to calculate the ON/OFF time of the transistor which yields maximum stable voltage across the output, meaning we need to make sure that the inductor is optimally switched such that it’s neither switched ON too quickly which might not allow it to discharge optimally, and...
In addition to the transistor voltage drop, the LED will also drop somewhere between 1.2 and 3 volts when it’s switched on (check the datasheet under VF). Therefore, in order to calculate the correct value for resistor Rc, the voltage drop across the collector/emitter (VCE(sat)) and th...
To calculate the parameters safely we must take care of the following considerations: Current Sharing with Emitter Resistors: The voltage drop across each emitter resistor is supposed to be approximately equal. The value of the emitter resistors can be calculated with regards to the desired current ...