How to Build a Magnetic Stir Plate_ 9 Steps (With Pictures)
Content
12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
How to Build a Magnetic Stir Plate
Building a magnetic stir plate [1] is a great weekend project for beginners. This article shows you how to wire a stirrer correctly when using a potentiometer. Dan, from StirStarters.com emphasizes the importance of wiring a potentiometer with a voltage regulator, he advises against designs that use just a potentiometer to control speed. At low speeds, the potentiometer drops the full voltage from the power supply, since most potentiometers are designed to only dissipate 1/4 to 1/2 watt; the potentiometer requires a voltage regulator to prevent damaged.[2].
Steps
1
Mount the magnet to the PC Fan by gluing the washer to the top of the fan. Then place the magnet on top of the washer. The washer acts as a electromagnetic
shield between the magnetic components of the fan and the mounted magnet.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
2
Mount the fan to the enclosure. You want the magnet to be as close as possible to the top of the enclosure. Some people use bolts with nuts and washers to raise the NOTE: Keep in mind that the weight of the container of liquid may cause the top of the enclosure to sink.
fan from the bottom of the enclose.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
3 4
Mount the remaining components (DC power jack, potentiometer, on/off switch) to the enclosure.
Start the basic wiring by adding the positive and negative wiring to the DC power jack. Then connect the positive line from your jack to the on/off switch.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
5
Wire the Potentiometer, LM317T Voltage Regulator, Resistor, and Fan together. Review the "LM317T Flowchart" and "Wiring
Voltage Regulator Pin Diagram
Comments" images, and the LM317T Voltage Regulator Datasheet[3] link for specific wiring guidelines.
6 7
Wire the Capacitors if necessary. The 0.1 ohm capacitor is required if the distance between the DC power jack is greater than 6" from potentiometer. The 1.0 ohm
capacitor is not necessary but is recommended to reduce transient response.
Double Check & Turn it on. Double check your connections and make sure wires are not touching inappropriately. Turn your potentiometer about half way, plug in your
9V or 12V power supply and click the on/off switch if necessary. If it doesn't work, review the diagrams and try and determine what's wrong.
8
Add electrical tape to exposed wires. Remove any pieces of wire, solder, or woodchips that may still be in the enclosure. And, tape any loose wires down as
necessary.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
9
cost.
FINAL THOUGHTS. This wikiHow uses the flowchart from StirStarters which uses a 330 ohm resistor. I have no idea if it matters that I used a stronger resistor. I was
unable to find a LM317 voltage regulator and a 2K Potentiometer so a LM317T and a 5K Pot was used. The Images do not use the 1.0 ohm Capacitor because of the added build
AC Voltage Stabilizers?
www.ashleyedison.com AC Voltage Stabilizers & Power Conditioners at Unbeatable Prices
gaussmeter, teslameter Centrale lemne otel fonta
Tips
You can use a multimeter to test problems with your wiring. Do not glue the magnet to the washer. This will allow you to adjust the position of the magnet for best placement. When wiring, add the capacitors last, it is much easier for beginners to understand the electronic schematic/diagram without them, and you can test the stir plate wiring without the capacitors. You can get a PC fan from an old computer or pc power supply. You can get 2 rare earth magnets from an old hard drive.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
Warnings
Electricity kills, regardless of voltage. Do not work on electronics while plugged into the power source.
Things You'll Need
Enclosure Wire Glue Gun Electrical Tape Computer Fan 1.5" Washer Rare Earth Magnet 5K Potentiometer and some type of knob LM317T Voltage Regulator 330 Ohm Resistor 1" magnetic stir bar (Recommended) Pyrex Erlenmeyer Flask (Recommended) 0.1 Ohm Capacitor (Recommended) Soldering Iron (Recommended) 1.0 Ohm Capacitor (Optional) DC Power Jack (Optional)
Sources and Citations
1. ↑ http://en.wikipedia.org/wiki/Magnetic_stirrer - Magnetic Stir Plate Described 2. ↑ http://www.stirstarters.com/instructions.html - StirStarters DIY Stir Plate 3. ↑ http://www.datasheetdir.com/ONSEMI-LM317T+download - LM317T Datasheet
Article Info
Categories: Hobbies and Crafts
www.wikihow.com/Build-a-Magnetic-Stir-Plate 6/7
12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
Recent edits by: Rock20000, Teresa, Adelaide
LM317S
www.littlediode.com Buy this component NOW - Price: £2.99 - $4.72 - EUR 3.59
Thanks to all authors for creating a page that has been read 648 times.
www.wikihow.com/Build-a-Magnetic-Stir-Plate
7/7
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
How to Build a Magnetic Stir Plate
Building a magnetic stir plate [1] is a great weekend project for beginners. This article shows you how to wire a stirrer correctly when using a potentiometer. Dan, from StirStarters.com emphasizes the importance of wiring a potentiometer with a voltage regulator, he advises against designs that use just a potentiometer to control speed. At low speeds, the potentiometer drops the full voltage from the power supply, since most potentiometers are designed to only dissipate 1/4 to 1/2 watt; the potentiometer requires a voltage regulator to prevent damaged.[2].
Steps
1
Mount the magnet to the PC Fan by gluing the washer to the top of the fan. Then place the magnet on top of the washer. The washer acts as a electromagnetic
shield between the magnetic components of the fan and the mounted magnet.
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www.wikihow.com/Build-a-Magnetic-Stir-Plate
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
2
Mount the fan to the enclosure. You want the magnet to be as close as possible to the top of the enclosure. Some people use bolts with nuts and washers to raise the NOTE: Keep in mind that the weight of the container of liquid may cause the top of the enclosure to sink.
fan from the bottom of the enclose.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
3 4
Mount the remaining components (DC power jack, potentiometer, on/off switch) to the enclosure.
Start the basic wiring by adding the positive and negative wiring to the DC power jack. Then connect the positive line from your jack to the on/off switch.
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12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
5
Wire the Potentiometer, LM317T Voltage Regulator, Resistor, and Fan together. Review the "LM317T Flowchart" and "Wiring
Voltage Regulator Pin Diagram
Comments" images, and the LM317T Voltage Regulator Datasheet[3] link for specific wiring guidelines.
6 7
Wire the Capacitors if necessary. The 0.1 ohm capacitor is required if the distance between the DC power jack is greater than 6" from potentiometer. The 1.0 ohm
capacitor is not necessary but is recommended to reduce transient response.
Double Check & Turn it on. Double check your connections and make sure wires are not touching inappropriately. Turn your potentiometer about half way, plug in your
9V or 12V power supply and click the on/off switch if necessary. If it doesn't work, review the diagrams and try and determine what's wrong.
8
Add electrical tape to exposed wires. Remove any pieces of wire, solder, or woodchips that may still be in the enclosure. And, tape any loose wires down as
necessary.
www.wikihow.com/Build-a-Magnetic-Stir-Plate
4/7
12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
9
cost.
FINAL THOUGHTS. This wikiHow uses the flowchart from StirStarters which uses a 330 ohm resistor. I have no idea if it matters that I used a stronger resistor. I was
unable to find a LM317 voltage regulator and a 2K Potentiometer so a LM317T and a 5K Pot was used. The Images do not use the 1.0 ohm Capacitor because of the added build
AC Voltage Stabilizers?
www.ashleyedison.com AC Voltage Stabilizers & Power Conditioners at Unbeatable Prices
gaussmeter, teslameter Centrale lemne otel fonta
Tips
You can use a multimeter to test problems with your wiring. Do not glue the magnet to the washer. This will allow you to adjust the position of the magnet for best placement. When wiring, add the capacitors last, it is much easier for beginners to understand the electronic schematic/diagram without them, and you can test the stir plate wiring without the capacitors. You can get a PC fan from an old computer or pc power supply. You can get 2 rare earth magnets from an old hard drive.
Carti Editura Trei
www.dordecarte.ro Comanzi usor - Primesti rapid. Cati in stoc - Reduceri
Bamboo Paper Download Free PC Software
www.wikihow.com/Build-a-Magnetic-Stir-Plate 5/7
12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
Warnings
Electricity kills, regardless of voltage. Do not work on electronics while plugged into the power source.
Things You'll Need
Enclosure Wire Glue Gun Electrical Tape Computer Fan 1.5" Washer Rare Earth Magnet 5K Potentiometer and some type of knob LM317T Voltage Regulator 330 Ohm Resistor 1" magnetic stir bar (Recommended) Pyrex Erlenmeyer Flask (Recommended) 0.1 Ohm Capacitor (Recommended) Soldering Iron (Recommended) 1.0 Ohm Capacitor (Optional) DC Power Jack (Optional)
Sources and Citations
1. ↑ http://en.wikipedia.org/wiki/Magnetic_stirrer - Magnetic Stir Plate Described 2. ↑ http://www.stirstarters.com/instructions.html - StirStarters DIY Stir Plate 3. ↑ http://www.datasheetdir.com/ONSEMI-LM317T+download - LM317T Datasheet
Article Info
Categories: Hobbies and Crafts
www.wikihow.com/Build-a-Magnetic-Stir-Plate 6/7
12.12.2013
How to Build a Magnetic Stir Plate: 9 Steps (with Pictures)
Recent edits by: Rock20000, Teresa, Adelaide
LM317S
www.littlediode.com Buy this component NOW - Price: £2.99 - $4.72 - EUR 3.59
Thanks to all authors for creating a page that has been read 648 times.
www.wikihow.com/Build-a-Magnetic-Stir-Plate
7/7
