Background and Requirements

Tools

Parts List

Description Source Part Number Cost Parts / item
Westinghouse 6” Lamp nipples Home Depot 7060600 $3.77 10
Westinghouse Solid Brass Nuts Home Depot 7017200 $2.77 12
3/8” x 3” Nylon Hex Bolt Home Depot 17248 $0.98 3
Master Magnetic 3/4” Ceramic Mag Home Depot 96244 $1.98 8
1.0 kohm 1/4w 5% Resistor Jameco 690865 $0.099 10
10 pF ceramic Capacitor Jameco 15333 $0.09 10
Optek OH180U Hall Effect Switch Jameco 1871879 $2.95 1
30 awg wire wrap wire various
Solder
Mylar tape
JB Weld
3 position female PWM cable

Cost per Device

Description Cost Cost per device Notes
Lamp Nipples $3.77 $0.377
Brass Nuts $2.77 $0.461 2 per device
Nylon bolt $0.98 $0.326
Magnets $1.98 $0.248
1k Resistor $0.099 $0.0099
10pF Cap $0.09 $0.009
OH180U Hall Effect Switch $2.95 $2.95
Misc – Tape, solder, epoxy $0.50
$4.88

Schematic

Here is the internal schematic Magnetic Limit Switch Schematic

Material Prep

Assembly

Testing

Finishing Up

Final notes