Hello, this is my first post
I've come across a very interesting situation, and I think I've found the answer. Short story: I have 5V 500mA DC, and I need 1V 500mA DC.
Long story: I have a KVM Switch, with no power cord. I also have a shortage of outlets in that area. Installing more, or getting a power strip is not an option (I'm in Iraq, limited funding/supplies - and not as much fun!).
My first thought would be to buy a power adapter. I can't find one that provides this voltage/current. My second thought was to build an AC to DC converter, and step down the voltage appropriately.
Then I stumbled across some interesting articles, and it turns out USB provides 5V 500mA DC. There's gonna be 3 computers next to the KVM switch, all with an open USB port.
Bingo. Thats what I wanna do. I researched it, and I came up with a Zener Diode. I've come across a couple schematics too, but not being an electrical person, I dont quite understand.
So, if you could please, I was wondering if you could please explain to me how the hell people know what size resistor, the voltage of the Zener diode to use, etc. I dont want you to tell me the answer, I wan't to know why
Also, with that, any alternate recommendations other than a Zener Diode?
I've come across a very interesting situation, and I think I've found the answer. Short story: I have 5V 500mA DC, and I need 1V 500mA DC.
Long story: I have a KVM Switch, with no power cord. I also have a shortage of outlets in that area. Installing more, or getting a power strip is not an option (I'm in Iraq, limited funding/supplies - and not as much fun!).
My first thought would be to buy a power adapter. I can't find one that provides this voltage/current. My second thought was to build an AC to DC converter, and step down the voltage appropriately.
Then I stumbled across some interesting articles, and it turns out USB provides 5V 500mA DC. There's gonna be 3 computers next to the KVM switch, all with an open USB port.
Bingo. Thats what I wanna do. I researched it, and I came up with a Zener Diode. I've come across a couple schematics too, but not being an electrical person, I dont quite understand.
So, if you could please, I was wondering if you could please explain to me how the hell people know what size resistor, the voltage of the Zener diode to use, etc. I dont want you to tell me the answer, I wan't to know why
Also, with that, any alternate recommendations other than a Zener Diode?