M3tal
0
- Joined
- Dec 9, 2010
- Messages
- 42
- Points
- 0
I'm in the process of building my first laser and I'm trying to learn a little about electronics as I go...
I have a bunch of DC adapters from defunct electronics that I no longer use and I'm trying to determine if any of them would be a good power source for a rkcstr driving a 6x BluRay or 20x DVD burner diode (bought from Modwerx after killing the PHR I was originally using). I was messing around with my DMM, testing the various adapters and I noticed that every adapter I tested was putting out more voltage than it was rated for, sometimes by a lot.
For instance:
Rated 7.5v 1A outputs ~11v
Voltage selectable 1.5v - 12v 300mA outputs >15v on ANY voltage setting
Rated 9v 210mA outputs >10v
My thought was that if the 7.5v adapter was putting out 11v that it would work fine for driving a diode, since the rkcstr can handle up to 12v of input? But why is it rated as 7.5v when it puts out ~11v? And also, why the heck does the voltage selectable adapter ALWAYS put out over 15v no matter what the voltage is set at? This makes no sense to me, what am I missing here?
I've been reading up on basic electronics on this site: basic electronics and am learning how to calculate voltage, current etc. using Ohm's Law but I haven't yet had that "AHA" moment where it all makes sense.
I have a bunch of DC adapters from defunct electronics that I no longer use and I'm trying to determine if any of them would be a good power source for a rkcstr driving a 6x BluRay or 20x DVD burner diode (bought from Modwerx after killing the PHR I was originally using). I was messing around with my DMM, testing the various adapters and I noticed that every adapter I tested was putting out more voltage than it was rated for, sometimes by a lot.
For instance:
Rated 7.5v 1A outputs ~11v
Voltage selectable 1.5v - 12v 300mA outputs >15v on ANY voltage setting
Rated 9v 210mA outputs >10v
My thought was that if the 7.5v adapter was putting out 11v that it would work fine for driving a diode, since the rkcstr can handle up to 12v of input? But why is it rated as 7.5v when it puts out ~11v? And also, why the heck does the voltage selectable adapter ALWAYS put out over 15v no matter what the voltage is set at? This makes no sense to me, what am I missing here?
I've been reading up on basic electronics on this site: basic electronics and am learning how to calculate voltage, current etc. using Ohm's Law but I haven't yet had that "AHA" moment where it all makes sense.