Electronics guide: Diode, Capacitor, Arduino Platform, and Electronics Store
In a capacitor, the steady state current refers to the condition where the rate of change of charge on the capacitor plates becomes zero over time. This means that once the capacitor is fully charged (or discharged), the current flowing into or out of the capacitor ceases to exist. In other words, the steady state … Read more
A bias resistor in electronics is used to establish a specific operating point, or bias point, for active components such as transistors or operational amplifiers within a circuit. The resistor is typically connected to the base or gate of a transistor or the input of an operational amplifier to set the DC voltage level at … Read more
The voltage across a capacitor cannot change instantaneously due to its inherent property of storing electrical charge. When a voltage is suddenly applied or changed across a capacitor, it cannot immediately adjust to the new voltage due to the time it takes for the capacitor to charge or discharge. This delay is characterized by the … Read more
Variable resistors, also known as potentiometers or rheostats, have various uses across different applications. One common use for a variable resistor is in electronic circuits where precise control over resistance is necessary. They are often employed to adjust the voltage levels in a circuit, thereby controlling the amount of current flowing through specific components. This … Read more
A current limiting resistor is essential when driving an LED to ensure that the LED operates within its safe current range and does not exceed its maximum rated current. LEDs are current-driven devices, meaning their brightness and longevity are directly influenced by the current flowing through them. While LEDs do have a forward voltage drop … Read more
Resistors are passive electronic components that do not have polarity. Unlike components such as capacitors or diodes, which have specific orientations for their positive and negative terminals, resistors can be connected in any direction within a circuit without affecting their functionality. This is because resistors function based on the flow of current through them and … Read more
A MOSFET can be considered a voltage-controlled resistor under certain conditions where its drain-source resistance (R_DS(on)) varies with the gate-source voltage (V_GS). In linear operation, particularly in the ohmic region (when V_DS is small compared to V_GS – V_th), the MOSFET behaves similarly to a variable resistor whose resistance changes with the applied gate-source voltage. … Read more
A variable resistor, also known as a potentiometer or rheostat depending on its specific design, serves the function of adjusting resistance within an electronic circuit. Its primary role is to provide a variable resistance that can be manually adjusted to control voltage levels, current flow, or signal amplitude. This adjustability allows for precise tuning of … Read more
A resistor and a Zener diode serve different functions in electronic circuits. A resistor is a passive component that opposes the flow of electric current, converting electrical energy into heat. It is used to control current flow, set voltage levels, or divide voltages in a circuit. A Zener diode, on the other hand, is a … Read more
A resistor affects current in a circuit by limiting its flow according to Ohm’s law, V = IR, where V is voltage, I is current, and R is resistance. When current passes through a resistor, it experiences a voltage drop proportional to the current flowing through it and the resistance value. Therefore, while a resistor … Read more