A good understanding of car audio electronics helps you make better buying decisions -- As far as your car audio system is concerned.
In addition, you can more easily install whichever system you settle for.
It is therefore necessary that I walk you through.
In this article, I'll dwell on a few components of a car audio system -- Giving attention to the electronics behind them.
I'll do my best to write in English.
Car audio electronic components Car audio electronic components consist of many parts.
They include .
.
.
oDiode - A diode allows current to pass in one direction.
They are very useful in isolating current flow.
They are often used in automotive security systems as well.
oLEDS - A LED is a special diode.
LED stands for light-emitting diode.
You are probably familiar with these as they are commonly used as turn on indicators for most electronic equipment too.
oRelay- A relay is an electro mechanical switch.
It is most widely used for car security systems.
It is also commonly used as a way of protecting your head unit from damage.
Normally a relay allows a small current to control a much larger current.
A little more on relays A relay consists of four main parts .
.
.
1.
A coil denoted by terminals 85 and 86.
2.
A common terminal denoted by terminal 30.
3.
A normally closed terminal that is labeled terminal 87 4.
And a normally open terminal labeled terminal 87.
Depending on whether your controlling voltage is negative or positive, the terminal 85 or 86 will be grounded or connected to +12 volts.
If you have a positive controlling voltage like a head unit remote turn-on lead, then you will need to ground either terminal 85 or 86.
It does not matter which one you choose, the other terminal will be connected to the remote turn-on lead of your head unit.
The common lead that is terminal 30 would be connected to +12 volts because that is what we want to apply to terminal 87 when the relay coil is energized.