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Various resistor types of different shapes and sizes. A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
Schematic diagrams showing pull-up (PU) and pull-down (PD) resistors. When the switch is open, the PU/PD pulls the digital input voltage to Vcc or Vss, respectively. When the switch is closed, the digital input is connected to a low-impedance driving source, which may be a logic low or high level irrespective of whether the circuit has a PU or PD.
Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components ...
However, the series resistors R M1 and R M2 are low Ohmic resistors (like in the photo) meant to pass current around the instruments M1 and M2, and function as shunt resistors to those instruments. R M1 and R M2 are connected in parallel with M1 and M2. If seen without the instruments these two resistors would be considered series resistors in ...
Zero-ohm axial lead resistor Zero-ohm surface-mount resistor. A zero-ohm link or zero-ohm resistor is a wire link packaged in the same physical package format as a resistor.It is used to connect traces on a printed circuit board (PCB).
Resistors (and other elements with resistance) oppose the flow of electric current; therefore, electrical energy is required to push current through the resistance. This electrical energy is dissipated, heating the resistor in the process. This is called Joule heating (after James Prescott Joule), also called ohmic heating or resistive heating.
SMD resistors on the backside of a PCB. Pass current in proportion to voltage and oppose current. Resistor – fixed value Power resistor – larger to safely dissipate heat generated; SIP or DIP resistor network – array of resistors in one package; Variable resistor Rheostat – two-terminal variable resistor (often for high power)
An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow. It is a type of electrical circuit.
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