May 14, 2009, at 04:41 PM by rmn236 -

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It is always good practice to test a power supply before using it for the first time.

to:

It is always good practice to test a power supply before using it for the first time. The example below will show how to test a power supply with positive polarity. If you have a negative polarity power supply, then you will get a negative reading. You should then switch the position of the multimeter probes.

May 14, 2009, at 04:38 PM by rmn236 -

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(:if auth edit:)

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(:if auth edit:)

January 22, 2009, at 06:07 PM by rmn236 -

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On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.54V" everything is fine and dandy. If you get a reading of "-12.54V" then your probes are attached in reverse. If this happens and you are positive you connected your probes correctly, double check the polarity on your power supply's label and make sure the circuit you will be powering with this unit is designed to handle this polarity.

to:

On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.56V" everything is fine and dandy. If you get a reading of "-12.56V" then your probes are attached in reverse. If this happens and you are positive you connected your probes correctly, double check the polarity on your power supply's label and make sure the circuit you will be powering with this unit is designed to handle this polarity.

January 22, 2009, at 06:06 PM by rmn236 -

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It is always good practice to test a power supply before using it for the first time.

January 22, 2009, at 06:04 PM by rmn236 -

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Abbreviations

to:

Abbreviations

January 22, 2009, at 06:03 PM by rmn236 -

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If the voltage showing on your multimeter is more than half a volt or a volt off its rating, then you most likely have what is called an unregulated power supply. The 12V Jameco power supply we used is this example is a regulated one, so that is why the voltage we received was so close to the voltage it was rated for.

to:

If the voltage showing on your multimeter is more than half a volt or a volt off its rating, then you most likely have what is called an unregulated power supply. The 12V Jameco power supply we used in this example is a regulated one, so that is why the voltage we received was so close to the voltage it was rated for.

January 22, 2009, at 06:03 PM by rmn236 -

Changed line 51 from:

On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.54V" everything is fine and dandy. If you get a reading of "-12.54V" then your probes are attached in reverse. If this happens and you are positive you connected your probes correctly, double check the polarity on your power supplies label and make sure the circuit you will be power with this unit is designed to handle this polarity.

to:

On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.54V" everything is fine and dandy. If you get a reading of "-12.54V" then your probes are attached in reverse. If this happens and you are positive you connected your probes correctly, double check the polarity on your power supply's label and make sure the circuit you will be powering with this unit is designed to handle this polarity.

Added lines 54-55:

If the voltage showing on your multimeter is more than half a volt or a volt off its rating, then you most likely have what is called an unregulated power supply. The 12V Jameco power supply we used is this example is a regulated one, so that is why the voltage we received was so close to the voltage it was rated for.

January 22, 2009, at 06:00 PM by rmn236 -

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Plug your power supply into an AC outlet. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

to:

Plug your power supply into an AC outlet. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg
Red probe goes into the tip
Black probe touches the barrel

January 22, 2009, at 05:54 PM by rmn236 -

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to:

http://itp.nyu.edu/physcomp/images/powersupply_notes/multimeter.jpg

January 22, 2009, at 05:53 PM by rmn236 -

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Plug your power supply into an AC outlet.

to:

Plug your power supply into an AC outlet. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

Deleted line 48:

http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

January 22, 2009, at 05:52 PM by rmn236 -

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Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

to:

Turn on your multimeter and set it to read DC voltage.

http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

January 22, 2009, at 05:52 PM by rmn236 -

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Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

to:

Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

January 22, 2009, at 05:52 PM by rmn236 -

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Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

to:

Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

January 22, 2009, at 05:51 PM by rmn236 -

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Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg | Testing your power supply

to:

Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg

January 22, 2009, at 05:49 PM by rmn236 -

January 22, 2009, at 05:48 PM by rmn236 -

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Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/check_powersupply.jpg | Testing your power supply

to:

Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/powersupply_notes/check_powersupply.jpg | Testing your power supply

January 22, 2009, at 05:47 PM by rmn236 -

Changed lines 48-49 from:

Turn on your multimeter and set it to read DC voltage.
Take the red (positive) probe from your multimeter and stick it into the end of the power supply plug. http://itp.nyu.edu/physcomp/uploads/power_supply_polarity_01.jpg | Positive Polarity

to:

Turn on your multimeter and set it to read DC voltage. http://itp.nyu.edu/physcomp/images/check_powersupply.jpg | Testing your power supply
Take the red (positive) probe from your multimeter and stick it into the end of the power supply plug.

January 22, 2009, at 05:46 PM by rmn236 -

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Take the red (positive) probe from your multimeter and stick it into the end of the power supply plug.

http://itp.nyu.edu/physcomp/uploads/power_supply_polarity_01.jpg | Positive Polarity

to:

Take the red (positive) probe from your multimeter and stick it into the end of the power supply plug. http://itp.nyu.edu/physcomp/uploads/power_supply_polarity_01.jpg | Positive Polarity

January 22, 2009, at 05:46 PM by rmn236 -

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http://itp.nyu.edu/physcomp/uploads/power_supply_polarity_01.jpg | Positive Polarity

January 22, 2009, at 05:46 PM by rmn236 -

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Take the black (negative) probe from your multimeter and carefully touch it against the barrel of the plug without touching the tip or your red probe.
On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.54V"

to:

Take the black (negative) probe from your multimeter and carefully touch it against the barrel of the plug without touching the tip or your red probe. If you make a connection, you will be creating a short circuit.
On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.54V" everything is fine and dandy. If you get a reading of "-12.54V" then your probes are attached in reverse. If this happens and you are positive you connected your probes correctly, double check the polarity on your power supplies label and make sure the circuit you will be power with this unit is designed to handle this polarity.

January 22, 2009, at 05:42 PM by rmn236 -

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Part# 170245 (12V, 1000mA)''' Available at the NYU computer store.

to:

Part# 170245 (12V, 1000mA)'''
Available at the NYU computer store.

January 22, 2009, at 05:42 PM by rmn236 -

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Jameco 12V Regulated Switching Power Supply\\Part# 170245 (12V, 1000mA) Available at the NYU computer store.

to:

Jameco 12V Regulated Switching Power Supply
Part# 170245 (12V, 1000mA) Available at the NYU computer store.

January 22, 2009, at 05:41 PM by rmn236 -

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Jameco 12V Regulated Switching Power Supply, Part# 170245 (12V, 1000mA) Available at the NYU computer store.

to:

Jameco 12V Regulated Switching Power Supply\\Part# 170245 (12V, 1000mA) Available at the NYU computer store.

January 22, 2009, at 05:41 PM by rmn236 -

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Power supply is a reference to a source of electrical power.

to:

Power supply is a reference to the source of electrical power.

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There are many different kinds of DC Power Supplies but this one is most commonly used here at ITP:

to:

There are many different kinds of DC power supplies but this one is most commonly used here at ITP:

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Jameco 170245 (12V, 1000mA) Available at the NYU computer store.

to:

Jameco 12V Regulated Switching Power Supply, Part# 170245 (12V, 1000mA) Available at the NYU computer store.

Added lines 45-50:

Plug your power supply into an AC outlet.
Turn on your multimeter and set it to read DC voltage.
Take the red (positive) probe from your multimeter and stick it into the end of the power supply plug.
Take the black (negative) probe from your multimeter and carefully touch it against the barrel of the plug without touching the tip or your red probe.
On your multimeter you should see a reading of the voltage coming from your power supply. If you are checking a 12V power supply and your multimeter shows "12.54V"

January 22, 2009, at 05:00 PM by rmn236 -

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(:if auth edit:)

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Regulated vs. Unregulated power supplies

to:

Regulated vs. Unregulated power supplies

(:if:)

January 22, 2009, at 05:00 PM by rmn236 -

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AC : Alternating Current\\

to:

AC : Alternating Current

Testing your power supply

Regulated vs. Unregulated power supplies

January 22, 2009, at 04:59 PM by rmn236 -

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Make sure you know the polarity of the plug so you don't reverse polarity on a component and blow it up. The diagram below showing positive tip polarity on the left and negative tip polarity on the right. The center positive drawing on the left indicates that the center (tip) of the output plug is positive (+) and the barrel of the output plug is negative (-).

to:

Make sure you know the polarity of the plug so you don't reverse polarity for your circuit and damage your components. The diagram below showing positive tip polarity is on the left and negative tip polarity is on the right. The center positive drawing on the left indicates that the center (tip) of the output plug is positive (+) and the barrel of the output plug is negative (-).

January 22, 2009, at 04:48 PM by rmn236 -

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VDC : Volts DC\\

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AC : Alternating Current

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AC : Alternating Current\\

January 22, 2009, at 01:46 PM by hkm218 -

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W : Watts\\

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W : watts

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January 22, 2009, at 01:46 PM by hkm218 -

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W : watts

January 22, 2009, at 01:29 PM by hkm218 -

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Abbreviations

V : Volts A : Amperes mA : miliAmperes VA : Volt Amperes VAC : Volts AC DC : Direct Current AC : Alternating Current

to:

Abbreviations

V : Volts
A : Amperes
mA : miliAmperes
VA : Volt Amperes
VAC : Volts AC
DC : Direct Current
AC : Alternating Current\\

January 22, 2009, at 01:28 PM by hkm218 -

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- more information will be added soon
hyeki

to:

Abbreviations

V : Volts A : Amperes mA : miliAmperes VA : Volt Amperes VAC : Volts AC DC : Direct Current AC : Alternating Current

January 22, 2009, at 01:18 PM by hkm218 -

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Most power supplies have a rating label that looks something like this.
Make sure you know the polarity of the plug so you don't reverse polarity on a component and blow it up.\\

to:

Most power supplies have a rating label that looks something like this. Make sure you know the polarity of the plug so you don't reverse polarity on a component and blow it up.

January 22, 2009, at 01:18 PM by hkm218 -

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Most power supplies have a rating label that looks something like this. Make sure you know the polarity of the plug so you don't reverse polarity on a component and blow it up.

to:

Most power supplies have a rating label that looks something like this.
Make sure you know the polarity of the plug so you don't reverse polarity on a component and blow it up.
The diagram below showing positive tip polarity on the left and negative tip polarity on the right. The center positive drawing on the left indicates that the center (tip) of the output plug is positive (+) and the barrel of the output plug is negative (-).

January 22, 2009, at 01:00 PM by hkm218 -

Changed lines 23-24 from:

to:

Make sure you know the polarity of the plug so you don't reverse polarity on a component and blow it up.

January 21, 2009, at 07:00 PM by hkm218 -

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Added lines 23-25:

http://itp.nyu.edu/physcomp/uploads/power_supply_polarity_01.jpg | Positive Polarity http://itp.nyu.edu/physcomp/uploads/power_supply_polarity_02.jpg | Negative Polarity

January 21, 2009, at 06:49 PM by hkm218 -

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- more information will be added soon

to:

- more information will be added soon
hyeki

January 21, 2009, at 06:49 PM by hkm218 -

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- more information will be added soon

January 21, 2009, at 06:24 PM by hkm218 -

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Power supply is a reference to a source of electrical power.
Most electronic circuits require a DC power supply.

to:

Power supply is a reference to a source of electrical power. Most electronic circuits require a DC power supply. \\

January 21, 2009, at 06:23 PM by hkm218 -

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Most electronic circuits require a DC power supply. \\

to:

Most electronic circuits require a DC power supply.

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Jameco 170245 (12V, 1000mA) Available at the NYU computer store.

to:

Jameco 170245 (12V, 1000mA) Available at the NYU computer store.

January 21, 2009, at 06:21 PM by hkm218 -

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- Click on any image for a larger view

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Changed lines 20-21 from:

- Click on any image for a larger view.

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January 21, 2009, at 06:20 PM by hkm218 -

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Click on any image for a larger view.

to:

- Click on any image for a larger view.

January 21, 2009, at 06:20 PM by hkm218 -

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Click on any image for a larger view.

January 21, 2009, at 06:18 PM by hkm218 -

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http://itp.nyu.edu/physcomp/uploads/power_supply_01.jpg | DC Power Supply

to:

http://itp.nyu.edu/physcomp/uploads/power_supply_01.jpg | DC Power Supply

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http://itp.nyu.edu/physcomp/uploads/power_supply_02.jpg | A rating label

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http://itp.nyu.edu/physcomp/uploads/power_supply_02.jpg | A rating label

January 21, 2009, at 06:12 PM by hkm218 -

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Power supply is a reference to a source of electrical power. A device or system that supplies electrical or other types of energy to an output load or group of loads is called a power supply unit.

to:

Overview

Power supply is a reference to a source of electrical power.
Most electronic circuits require a DC power supply.
The most common operating voltages for microcontrollers and digital processors are 5V and 3.3V.
There are many different kinds of DC Power Supplies but this one is most commonly used here at ITP:

http://itp.nyu.edu/physcomp/uploads/power_supply_01.jpg | DC Power Supply Jameco 170245 (12V, 1000mA) Available at the NYU computer store.

http://itp.nyu.edu/physcomp/uploads/power_supply_02.jpg | A rating label Most power supplies have a rating label that looks something like this.

January 21, 2009, at 05:06 PM by hkm218 -

Added lines 1-2:

Power supply is a reference to a source of electrical power. A device or system that supplies electrical or other types of energy to an output load or group of loads is called a power supply unit.

DC Power Supply

Parts.DCPowerSupply History

Abbreviations

Abbreviations

Regulated vs. Unregulated power supplies

Regulated vs. Unregulated power supplies

Testing your power supply

Regulated vs. Unregulated power supplies

Abbreviations

Abbreviations

Abbreviations

Overview