Resistor symbols of electrical & electronic circuit diagram - resistor, potentiometer, variable resistor.
Table of resistor symbols
Resistor (IEEE) Resistor reduces the current flow. Resistor (IEC) Potentiometer (IEEE) Adjustable resistor - has 3 terminals. Potentiometer (IEC) Variable Resistor / Rheostat (IEEE) Adjustable resistor - has 2 terminals. Variable Resistor / Rheostat (IEC) Trimmer Resistor Preset resistor Thermistor Thermal resistor - change resistance when temperature changes Photoresistor / Light dependent resistor (LDR) Photo-resistor - change resistance with light intensity change