Hi there,
I'm starting to get interested in electronics a lot!
Of course I've been trying out stuff and messing with some things already.
Yesterday I made an LED glow, using a 5.7 V/800mA charger cable, using a resistor to decrease the voltage.
Are LEDs supposed to get noticeably hot and ... break? xP
Anyway, so since my LED is no more, I found something else to play with: A small 4cm x 4cm fan, which apparently is supposed to operate at 12 V and 130 mA. I found myself another charger which has the desired 12 V, but 1 ampere.
The first thing I thought was "Fine, I'll just put a resistor in there" But that would also reduce the volts, right?
Now how do I reduce the amperage without reducing the voltage?
I've been searching for answers for a while, with lots of different answers, which confuses and frustrates me,
especially as a beginner.
Some people said the supply ampere can be higher, and the device will just draw as much as it needs.
Other people said that this is not true. And one guy said you would use something called a zener diode.
Is that correct? And if it is, are there different types of those diodes, like with color coded resistors?
If this works as I think, you would reduce the electric power with a resistor to reach the desired ampere level,
and then use a diode (or 2?) to increase the voltage back to 12 volts again. And the amperes would stay the same?
Anyone know the answer?
I'm starting to get interested in electronics a lot!
Of course I've been trying out stuff and messing with some things already.
Yesterday I made an LED glow, using a 5.7 V/800mA charger cable, using a resistor to decrease the voltage.
Are LEDs supposed to get noticeably hot and ... break? xP
Anyway, so since my LED is no more, I found something else to play with: A small 4cm x 4cm fan, which apparently is supposed to operate at 12 V and 130 mA. I found myself another charger which has the desired 12 V, but 1 ampere.
The first thing I thought was "Fine, I'll just put a resistor in there" But that would also reduce the volts, right?
Now how do I reduce the amperage without reducing the voltage?
I've been searching for answers for a while, with lots of different answers, which confuses and frustrates me,
especially as a beginner.
Some people said the supply ampere can be higher, and the device will just draw as much as it needs.
Other people said that this is not true. And one guy said you would use something called a zener diode.
Is that correct? And if it is, are there different types of those diodes, like with color coded resistors?
If this works as I think, you would reduce the electric power with a resistor to reach the desired ampere level,
and then use a diode (or 2?) to increase the voltage back to 12 volts again. And the amperes would stay the same?
Anyone know the answer?