components Flashcards
Connects components and passes current easily from one part of a circuit to another.
wire
Supplies electrical energy. The larger line is positive (+). A single cell is often called a battery, but strictly speaking a battery is two or more cells joined together.
cell
Supplies electrical energy. A battery is more than one cell. The larger line is positive (+).
battery
Direct Current, always flowing in one direction.
DC
Alternating Current, continually changing direction.
AC
A safety device which will ‘blow’ (melt) if the current flowing through it exceeds a specified value.
fuse
A transducer which converts electrical energy to light. This symbol is used for a lamp providing illumination, for example a car headlamp or torch bulb.
lamp
A transducer which converts electrical energy to heat.
heater
A transducer which converts electrical energy to sound.
bell
A transducer which converts electrical energy to sound.
buzzer
Uses include limiting the current passing through an LED, and slowly charging a capacitor in a timing circuit.
resistor
t can be used with a resistor in a timing circuit, for smoothing a supply (it provides a reservoir of charge) and can be used as a filter (blocking DC signals but passing AC signals).
capacitor
A device which allows current to flow in only one direction.
diode
amplifies current and can be used with other components to make an amplifier or switching circuit. This symbol is for a bipolar junction transistor (BJT), the type you are most likely to use at first.
transistor
A transducer which converts sound to electrical energy.
microphone
