Frequently Asked Questions...
What potentiometer should I use with the Arduino Mega?
I have a project in mind that requires the use of several potentiometers as angle gauges. I need a potentiometer that will go from the 5V power supply to an analog input pin on the Arduino. The potentiometer needs to have no resistance at the lowest setting and nearly completely cut the 5V at the highest. It should not cut out all of the current before it reaches the highest setting, hence "nearly completely cut". What do you think? What value of pots should I buy?
Answer:
It sounds like you need something like a 100K potentiometer. Almost all potentiometers that you choose will be a short between the wiper and one pin at the low end and a 100K will have a resistance of 100K ohms at the high end (which might fit your "almost cut off" constraint).
Two good websites to look at are www.digikey.com or www.mouser.com. There are lots of different potentiometers and you can browse through them to see which ones will fit your project physically (size, knob, pins).
Good Luck!
 25Ft 8-Gauge 50A Pro Grip Lighted Welding Extension Cord Right Angle Plug UL/cUL US $89.99 
|
 Angles Scale Metal Thread Screw Cutting Gauge Tool US $4.00
|
 Wixey WR300 Digital Angle Gauge New!!! US $44.94
|
 2 Pcs Screw Cut Angle Measuring Thread Cutting Gauge US $5.19
|
 ADJUSTABLE ANGLE GAUGE 0 TO 60 DEGREE 3" X 1-1/2" X 1" US $40.95
|
 GAUGE MULTI-USE RULE AND GAGE GENERAL TOOL # 16me MEASURE ANGLES CENTER FINDER + US $12.95
|
 2 Pcs V Slot 8 Angle Degree Thread Screw Cutting Gauge US $8.07
|
 SEIFERT BEVEL CHEK & ANGLE CHEK GAUGES IN CASE US $299.99
|
 3X1-1/2X1" ADJUSTABLE ANGLE GAUGE US $39.20
|
 4X2X2" ADJUSTABLE ANGLE GAUGE US $50.40
|
 3X1-1/2X1" ADJUSTABLE ANGLE GAUGE US $39.20
|
 4X2X1-3/16" ADJUSTABLE ANGLE GAUGE US $36.00
|
 4X2X2" ADJUSTABLE ANGLE GAUGE US $50.40
|
 NEW Wixey Digital Angle Gauge US $52.99
|
 Digital Bevel Box Inclinometer Angle Gauge Meter Protractor 360° Magnets Base US $20.90
|
 Digital Angle Finder Meter Gauge Protractor Spirit Level 0 ~ 360° reads Upright US $26.00
|
 ALB Combo Angle Level and Base for up to 2" OD Tube Rotation Gauge US $79.90
|
 Digital Angle Finder Gauge Inclinometer Protractor Gauge Meter 2 Buttons US $25.99
|
 Digital Angle Finder Gauge Inclinometer Protractor Gauge Meter 3 Buttons US $26.99
|
 Digital Gauge Angle Finder Protractor Inclinometer W/Spirit Level 3 Buttons BL US $29.99
|
 ADJUSTABLE ANGLE GAUGE 0 TO 60 DEGREE NEW 4" X 2" X 2" US $44.95
|
 DIGITAL ANGLE GAUGE US $21.15
|
 LED DIGITAL ELECTRONIC SLIDING T-SQUARE BEVEL MEASURING ANGLE GAUGE TOOL GAGE US $59.99
|
 STEEL PRECISION POCKET PROTRACTOR GAUGE MACHINIST ANGLE PROTRACTER GAGE TOOL US $17.99
|
 DIGITAL PRECISION POCKET PROTRACTOR GAUGE MACHINIST ANGLE PROTRACTER GAGE TOOL US $49.99
|
 Digital Inclinometer Angle Gauge Meter Protractor Spirit Level 360° with Magnets US $23.90
|
 Wixey WR300 Digital Angle Gauge US $49.99
|
 DIGITAL PROTRACTOR INCLINOMETER ANGLE GAUGE 4 X 90° US $43.95
|
 Thread Cut V Slot Angle Measuring Screw Cutting Gauge US $3.95
|
 Depth and Angle Gauge AGD0963 US $12.99
|
 AngleCube DIGITAL ANGLE GAUGE LEVEL SENSOR BEVEL GUAGE US $32.95
|
 Digital Angle Finder Gauge Inclinometer Protractor Bevel Box Gauge Meter US $29.99
|
 1 Starrett Angle Inspection Dial Gauge 25-141 .001" .250" Range US $89.95
|
 Mitutoyo 12 Piece Angle Gauge (Gage) Set US $375.00
|
 Digital Angle Finder 360° Spirit Level Protractor Gauge US $55.00
|
 Fowler 12 Piece Angle Gauge Set US $165.00
|
 ◥◣DIATEST SPLIT BALL RIGHT ANGLE BORE GAUGE◢◤ US $725.00
|
 Wixey WR300 Digital Angle Gauge and Bracket Combo for 1" to 2" Tube US $99.98
|
 14” DIGITAL PROTRACTOR & 12” RULE MITER GAUGE ANGLE FINDER MEASUREMENTS LRG LCD US $24.85
|
 Atmos 10 Piece Angle Gauge (Gage) Set US $65.00
|
 Fowler Angle Gauge Set - 12 Piece US $125.00
|
 XLO EX-CEL-O COMBINATION LEVEL & ANGLE GAUGE w' CASE US $111.11
|
 Wixey WR365 Digital Angle Finder Gauge Level US $49.99
|
 1 NEW PITTSBURGH DIGITAL ANGLE GAUGE ~LCD DISPLAY ~ ITEM# 95998 US $16.99
|
 SHARS 18 Piece Angle Gauge Set NEW US $26.00
|
 Wixey / Steel City Digital Angle Gauge (New in Package) US $39.99
|
 Wixey WR300 Digital Angle Gauge US $44.94
|
 Inclinometer Digital Protractor Angle Finder Gauge US $55.00
|
 VTG Magnetic Quick Clamp Angle Finder Gauge New Machinist Cabinetmaker Tool IOB US $24.99
|
 4X2X1-3/16" ADJUSTABLE ANGLE GAUGE US $36.00
|
 8” DIGITAL PROTRACTOR & RULE MITER GAUGE ANGLE FINDER US $22.85
|
 NEW iGaging Angle Cube Level/Bevel Gauge 35-222-6 US $34.99
|
 == Dual Axis == Digital Protractor Gauge Surface Inclination Angle Meter Cube US $28.88
|
 360 PROTRACTOR DIGITAL ANGLE GAGE GAUGE INCLINOMETER US $39.00
|
 50Ft 8-Gauge 50A Pro Grip Lighted Welding Extension Cord Right Angle Plug UL/cUL US $169.82
|
 HAWK METRIC ANGLE GAUGE TM12000 US $5.29
|
 Wixey WR300 Digital Angle Gauge NEW NIB US $44.95
|
 10 Piece Flat Angle Gauge (Gage) Set US $39.95
|
 Wixey WR365 Digital Angle Gauge and Level NEW NIB US $62.97
|
 General Hardware 444 Depth Angle Gauge Vintage Steel US $15.00
|
 Wixey Digital Angle Gauge For Miter Saws & Table Saws NEW US $49.99
|
 Angle Gauge SAE Protractor For Craftsman Civil Engineers Carpentry Construction US $17.99
|
 Wixey WR300 Digital Angle Finder Gauge Level US $39.99
|
 General Tools 444 Steel Depth and Angle Gauge US $17.99
|
Angle Gauge
Trend Angle Gauge
