Hello Friends,
I am running a DC motor connected to a 555 timer kit, which is rated for between 5 to 15v. I took the plug-in transformer from my dead Hewlett Packard flatbed image scanner (Could over voltage be the reason for peripherals early death?), which is tagged 120VAC 60Hz 7W input / Output 12VDC 300mA and measured 17.39.
I finished building my timer kit and was about to power it, so I decided to use my VOM to test. I expected the transformer to measure 12v, maybe 13-14v like a car battery that is supposed to be 12v. I did not hook it up to the 555 mono kit, But I did run the motor to make sure it worked.
Would 17.39 fry my 555 kit? I over voltage probably the reason my scanner died?
Can I use this transformer with a resistor of some sort (RED flag, I am a newbie) to get back to 12V?
Thanks,
Jeffrey
I am running a DC motor connected to a 555 timer kit, which is rated for between 5 to 15v. I took the plug-in transformer from my dead Hewlett Packard flatbed image scanner (Could over voltage be the reason for peripherals early death?), which is tagged 120VAC 60Hz 7W input / Output 12VDC 300mA and measured 17.39.
I finished building my timer kit and was about to power it, so I decided to use my VOM to test. I expected the transformer to measure 12v, maybe 13-14v like a car battery that is supposed to be 12v. I did not hook it up to the 555 mono kit, But I did run the motor to make sure it worked.
Would 17.39 fry my 555 kit? I over voltage probably the reason my scanner died?
Can I use this transformer with a resistor of some sort (RED flag, I am a newbie) to get back to 12V?
Thanks,
Jeffrey