The diode looks in terms of its external form as an electrical resistance.
Also a 2-terminal diode has to know the anode and the cathode, the diode body usually has a colored ring at the cathode terminal side will in the following tried to show how to specify a diode in a schedule.
The diode is often seen as an electric valve.
The diode can because only current as if the cathode is connected to the negative terminal and the anode is connected to the positive terminal of the voltage source.
The size hangs like a resistor depends on the current passing through it is to run.
Diodes called often also called rectifiers, which is actually only true if one uses it for that too.
There are also emitting diodes that are better known to us these LEDs are available in several colors and types of these diodes are useful to see where and when there is a particular stream at a particular point.
You also have various types of diodes both germanium and silicon diode.
The biggest difference between these two diodes is that the silicon diode forward voltage of 0.6 volts and the germanium diode has a forward voltage of 0.2 volts so that needs to make so take your 12 V and there a silicon diode behind the voltage by the diode you will measure 11.4 volts after the diode.
Well I personally already done it to switch to bring up to 6 volts, 12 volts back through 10 silicon diodes in series, because after all, a silicon diode has a forward voltage of 0.6 V and 10 times is 6 volts so 12 Volt - 6 Volt 6 Volt.
There is also something called the zener diode.
This diode is used for stabilizing a voltage then there is also the capacity diode that hold in the capacitance which is present between anode and cathode will change as the voltage across the diode changes.
It lets you tune into a radio so a station which used to be a big variable capacitor was used.
Note that the big boys under the diodes or have the power diodes can be very hot.
That they should be using it or to mount on a heatsink even cooled
THE ELECTRONIC ENGINEER NEED THE DIODE FOR:
An AC voltage converting to a equal voltage with a rectifier.
The antenna signal is a signal gain to control for example the speaker or tube demodulation back.
To generate a voltage of 0.2 V in a germanium diode or 6 volts in a silicon diode and to stabilize.
Emit light by means of an LED.
Zener diode to provide a stabilized voltage.
DC currents to block.
To multiply frequencies as in the high frequency technique.
Limiting impulses.
Distort signals.
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