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Fuse
Only allows a predetermined amount of current (AMPS) to pass through and if that amount is exceeded it will melt in half (open)
Transistor
A solid-state electronic device that is used to control the flow of electricity in electronic equipment and usually consists of a small block of a semiconductor (as germanium) with at least three electrodes
Chassis Ground
Connects the circuit to the metal body or frame of the vehicle using the body as a conductor in the circuit
Ground
Connects the circuit to the metal body or frame of the vehicle using the body as a conductor in the circuit
(More commonly used than chassis ground)
Light Emitting Diode
A one-way check valve for electricity that lights up when current is passing through
Variable Capacitor
A variable capacitor is a capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically. Variable capacitors are often used in L/C circuits (tuners) to set the resonance frequency, e.g. to tune a radio (therefore they are sometimes called tuning capacitors)
Transformer/Coil
By appropriate selection of the numbers of turns (N), a transformer thus allows an alternating voltage to be stepped up — by making NS more than NP — or stepped down, by making it less.
The secondary induced voltage VS is scaled from the primary VP by a factor ideally equal to the ratio of the number of turns of wire in their respective windings: