will it work? i.e only draw 300mA from the 500mA transformer
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You are correct, the device will only draw its 300mA.
The 500mA is what the TX can supply if needed.
The 500mA is what the TX can supply if needed.
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A device DRAWS an amount of current depending on the size of the device. Your device DRAWS 300mA.
The transformer can cope with a device that draws 500mA.
Thus your transformer will easily supply 300mA which is well below its capabilities.
in fact it is only loaded to 60%.
It CANNOT supply to much current current.
Once again the current flow depends on the size of the load.
As a reassurance. the power house can supply Millions of amps but the current flow to a 60 watt light bulb at 240 volt is only 250 mA. Don'tt see many problems with houses blowing up
The transformer can cope with a device that draws 500mA.
Thus your transformer will easily supply 300mA which is well below its capabilities.
in fact it is only loaded to 60%.
It CANNOT supply to much current current.
Once again the current flow depends on the size of the load.
As a reassurance. the power house can supply Millions of amps but the current flow to a 60 watt light bulb at 240 volt is only 250 mA. Don'tt see many problems with houses blowing up
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Yes dude. practically it will work . But there might be a chance to burn out some components if supply current is higher that your device's requirment. So do one thing connect a variable ressister and between your device and transformer and adjust the current flow to your device's requirement. everything will be fine.
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electronics class was a long time ago- but I think this is the answer-
basically volts times amps = watts. your device is designed to work at 12vdc and 300ma (3600mw) but you are using 12vdc and 500ma (6000mw)
so the total watts is wrong.
many devices have a tolerance rating, if your device falls within the tolerance rating, it is ok to be a little off.
it would seem you would need to use ohm's law to figure out how many resistors and of what value to install in parallel to drop some current
http://physics.bu.edu/py106/notes/Circui…
if the device seems to work, it may not be for long- think of it as any other example, like if you said you require 3 meals a day, but i only gave you 1. you would probably live fine for a while, but then you would probably slowly start starving to death.... or if you said you required 3 meals per day, but i forced you to eat 6. you would do fine for a while, but then probably eventually gain so much weight you would not be able to function....
it is important to use the right numbers!
basically volts times amps = watts. your device is designed to work at 12vdc and 300ma (3600mw) but you are using 12vdc and 500ma (6000mw)
so the total watts is wrong.
many devices have a tolerance rating, if your device falls within the tolerance rating, it is ok to be a little off.
it would seem you would need to use ohm's law to figure out how many resistors and of what value to install in parallel to drop some current
http://physics.bu.edu/py106/notes/Circui…
if the device seems to work, it may not be for long- think of it as any other example, like if you said you require 3 meals a day, but i only gave you 1. you would probably live fine for a while, but then you would probably slowly start starving to death.... or if you said you required 3 meals per day, but i forced you to eat 6. you would do fine for a while, but then probably eventually gain so much weight you would not be able to function....
it is important to use the right numbers!
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Yes.