Author Topic: 5.25 volts on a 5v I/O analog port?  (Read 1042 times)

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Offline Its_FridayTopic starter

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5.25 volts on a 5v I/O analog port?
« on: March 31, 2009, 04:54:38 AM »
I've made a circuit that returns either 0 volts or 5.25 volts, and i need the axon microcontroller to read the voltage using the analog I/O ports. Will 5.25V still be read on a 5V analog I/O port? Or do i need to reduce the voltage?(if so, how? I've already tried voltage regulators but they only give me 5.25 volts)

Offline superchiku

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Re: 5.25 volts on a 5v I/O analog port?
« Reply #1 on: March 31, 2009, 06:55:32 AM »
it will be read as 5v anything hiher than te reference voltage isalwaz read as the max voltage... u va drop the voltage by using appropriate series resistance
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Offline Admin

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Re: 5.25 volts on a 5v I/O analog port?
« Reply #2 on: March 31, 2009, 09:01:40 PM »
I've made a circuit that returns either 0 volts or 5.25 volts, and i need the axon microcontroller to read the voltage using the analog I/O ports. Will 5.25V still be read on a 5V analog I/O port? Or do i need to reduce the voltage?(if so, how? I've already tried voltage regulators but they only give me 5.25 volts)
hmmmm I don't know where you found a 5.25V regulator but like 90% of all voltage regulators in the world are 5V. You should get a 5V regulator, as 5.25V will probably damage the ADC of the Axon.

Otherwise do a voltage divider.

Offline TrickyNekro

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Re: 5.25 volts on a 5v I/O analog port?
« Reply #3 on: April 03, 2009, 04:48:18 AM »
I would prefer a resistor zener thing...
Google: "zener regulator wiki"
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