Magnetic Stirrer Construction Directions

(240) 236-7294 fax

 

Part	Source	Catalog No.	Quantity	Unit Cost	Extended Total
6 to 12 VDC motor	All Electronics Corp	DCM-33	1	0.75	0.75
500 ohm potentiometer	All Electronics Corp	POT-500	1	0.50	0.50
9 VDC 300 ma transformer	All Electronics Corp	DCTX-921	1	3.00	3.00
knob, fits 1/4" shaft	All Electronics Corp	KNB-7	1	0.50	0.50
bovine magnet	Ag supply store		1	3.99	3.99
square plastic container	anywhere		1	2.50	2.50
#8 hexagonal nut	hardware store		1	0.05	0.05
Magnetic Stir bar	Cynmar	AP1088	1	0.75	0.75
				total	12.04
Scrap and Other Items Needed:
2" x 4" scrap, 6" long	hardware store
hot glue gun	hardware store
hot glue sticks	hardware store
1/8" wood drill bit	hardware store
5/16" drill bit	hardware store
soldering iron and solder	All Electronics

All Electronics Corporation

P.O. Box 567

Van Nuys, CA 91408

1-800-826-5432

 

Materials: motor, 9v transformer, 500 ½ potentiometer, plastic box, 1"x4"x5" motor support board, 2 wood screws, plastic knob, poker chip cow magnet support, cow magnet, teflon coated magnetic stir bar

 

Tools: philips screw driver, pliers, wire cutters, hot glue gun, soldering iron

 

Directions:

Refer to figure above:

 

1. Drill 5/16" hole in front of plastic container for potentiometer.

2. Drill 1/8" hole in back of plastic container for transformer wire and 2 holes on the sides for the wood screws.

3. Cut the plug off of end of transformer wire if there is one.

4. Separate the wires that make up the transformer power wire to a length of about 8 inches. Cut off the green wire if there is one.

5. Cut 4" off of one of the remaining transformer wires.

6. Pass the transformer wires from the outside, through the hole in the plastic container.

7. Extend about 1 foot of wire into the container, and tie a knot in the wire as a restraint.

8. Using the soldering iron and solder, tin the following:

•both leads on the motor

•the center and one of the side lugs on the potentiometer

•the ends of the transformer wires

•both ends of the 4" wire

9. Solder the longer split wire to one of the leads on the motor.

10. Solder the short transformer wire to the center lug on the potentiometer.

11. Solder the 4" piece of wire (cut from the transformer wire) to one of the outside lugs on the potentiometer.

12. Solder the other end of the 4" wire to the other lead on the motor.

13. Install the potentiometer into the hole in the front of the plastic container.

14. Hot glue the motor into the hole in the center of the piece of wood. Make sure the top side of the motor is flush with the top of the wood.

15. Install the piece of wood into the plastic container with 2 wood screws.

16. Place a drop of hot glue in the hole in the poker chip magnet support and install on the motor shaft.

17. Measure and mark the center of the cow magnet.

18. Run a stream of hot glue down the center of the poker chip magnet support.

19. Place the center of the cow magnet on the hot glue.

20. Place a drop of hot glue in the plastic knob and install on the shaft of the potentiometer.

 

Done!