Here are Todays Amazing Balance Disk Deals!
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 67mm 3PC Digital Filter Kit UV FLD CPL For Canon EF S 18 135mm IS Lens $13.79 Time Remaining: 25d 5h 56m Buy It Now for only: $13.79 Buy It Now | Add to watch list |
 LENSBABY 3G 50 mm F 20 Lens For Nikon PLUS A CANON ADAPTOR RING $52.00 (13 Bids) Time Remaining: 1d 17h 32m Bid now | Add to watch list |
 White Balance WB 67mm Lens Cap for Digital SLR Camera $6.58 Time Remaining: 29d 7h 37m Buy It Now for only: $6.58 Buy It Now | Add to watch list |
 LENS HOOD UV FILTER CAP CLEANING PEN FOR CANON 600D XTI $14.49 Time Remaining: 14d 17h 47m Buy It Now for only: $14.49 Buy It Now | Add to watch list |
 Digital Cameras 52mm White Balance Lens Filter Cap Disk $2.92 Time Remaining: 18d 16h 39m Buy It Now for only: $2.92 Buy It Now | Add to watch list |
 82mm 82mm Neutral Density ND4 Filter for 82mm lens of camera kit J037 $4.85 Time Remaining: 2d 2h 11m Buy It Now for only: $4.85 Buy It Now | Add to watch list |
 58MM HOOD + UV CPL FILTER + WHITE BALANCE CAP + LENS PEN FOR CANON T1i T2i T3i $19.49 Time Remaining: 15d 11h 41m Buy It Now for only: $19.49 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon 75 300mm III USM Lens $9.29 Time Remaining: 1d 12h 21m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 72mm 3PC Digital Filter Kit UV FLD CPL For Canon EF S 18 200mm IS Lens $13.99 Time Remaining: 25d 5h 56m Buy It Now for only: $13.99 Buy It Now | Add to watch list |
 Digital Cameras 58mm White Balance Lens Filter Cap Disk $3.15 Time Remaining: 18d 16h 39m Buy It Now for only: $3.15 Buy It Now | Add to watch list |
 58mm 3PC HD Digital Filter Kit UV FLD CPL For Canon HFS200 hf s200 vixia hfs200 $12.99 Time Remaining: 2d 8h Buy It Now for only: $12.99 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Nikon 55 300mm Lens $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 37MM Telephoto + Wide Angle + Fisheye + UV Filter f Canon Vixia HF10 HF20 HFM31 $63.24 Time Remaining: 1d 16h 26m Bid now | Add to watch list |
 52mm NEUTRAL WHITE BALANCE WB EXPOSURE DISC DISK $14.14 Time Remaining: 20d 4h 16m Buy It Now for only: $14.14 Buy It Now | Add to watch list |
 3 PCS 52MM FILTER KIT FOR CANON SX20IS SX10 SX1 IS $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 72mm 3PC Digital Filter Kit UV FLD CPL For Canon XL1 XL1S $13.29 Time Remaining: 2d 8h Buy It Now for only: $13.29 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Canon EF 50mm F 18 II Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon 35mm F 18G Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon 70 300mm IS USM Image Stabilizer Lens $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Canon EF S 60mm F 28 Macro USM Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 Digital Cameras 77mm White Balance Lens Filter Cap Disk $2.97 Time Remaining: 6d 16h 42m Buy It Now for only: $2.97 Buy It Now | Add to watch list |
 58mm CPL UV filter kit set for Canon EOS 550D Rebel T2i $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 72mm 3PC Digital Filter Kit UV FLD CPL For Nikon AF S 18 200mm Lens $13.29 Time Remaining: 25d 5h 56m Buy It Now for only: $13.29 Buy It Now | Add to watch list |
 55mm UV CPL Polarized FLD filter lens kit for Sony Alpha DSLR A100 A200 A300 $15.51 Time Remaining: 1d 15h 11m Bid now | Add to watch list |
 52MM 3 FILTER KIT UV FLD CPL CIRCULAR POLARIZER NEW $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 Digital Cameras 72mm White Balance Lens Filter Cap Disk $3.15 Time Remaining: 5d 16h 48m Buy It Now for only: $3.15 Buy It Now | Add to watch list |
 6pcs Gradual and Full ND2 ND4 ND8 Filter Set + 9pcs Ring Adapter for Cokin P $39.84 Time Remaining: 15d 23h 52m Buy It Now for only: $39.84 Buy It Now | Add to watch list |
 New Graduated gradual Gray Square Filter TIANYA filter for Cokin P series J236 $6.97 Time Remaining: 3d 22m Buy It Now for only: $6.97 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon 18 55mm VR Vibration Reduction Lens $8.79 Time Remaining: 12d 7h 3m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 Combination 58mm Lens Cap + White Balance Diffuser Disk $12.95 Time Remaining: 9d 20h 47m Buy It Now for only: $12.95 Buy It Now | Add to watch list |
 72mm Neutral Density ND4 Filter for 72mm lens $5.12 Time Remaining: 26d 59m Buy It Now for only: $5.12 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for CANON EF 50mm f 18 II $8.79 Time Remaining: 21d 8h 30m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 67mm 3PC Digital Filter Kit UV FLD CPL For Sony 28 75MM Lens $13.95 Time Remaining: 2d 8h Buy It Now for only: $13.95 Buy It Now | Add to watch list |
 52mm 3 Filter Kit for Nikon D5100 18 55mm Lens $8.79 Time Remaining: 18d 8h 55m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 77mm Professional UV CPL FLD lens filter set for Mamiya RB67 RZ67 + microfiber $27.59 Time Remaining: 2d 16h 41m Bid now | Add to watch list |
 Golden Mike 20M USB PC Camera Web Cam Computer Webcam $13.98 Time Remaining: 4d 22h 32m Buy It Now for only: $13.98 Buy It Now | Add to watch list |
 37MM Telephoto Zoom + Fisheye + UV Filter + Cleaning Kit for Panasonic PV GS80 $54.99 Time Remaining: 20d 20h 41m Buy It Now for only: $54.99 Buy It Now | Add to watch list |
 77mm 3PC Digital Filter Kit UV FLD CPL For Canon EF 24 105mm IS USM Lens $15.99 Time Remaining: 25d 5h 56m Buy It Now for only: $15.99 Buy It Now | Add to watch list |
 52mm 3 Filter Kit for Nikon D5000 18 55mm VR Lens $8.79 Time Remaining: 1d 12h 21m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon 18 55mm IS Image Stabilizer Lens $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 Digital Cameras 52mm White Balance Lens Filter Cap Disk $8.48 Time Remaining: 20d 18h 53m Buy It Now for only: $8.48 Buy It Now | Add to watch list |
 Flycam 3000 Body Pod 80mm matte box for 5d hv 20 dv cam $279.00 Time Remaining: 22d 22h 29m Buy It Now for only: $279.00 Buy It Now | Add to watch list |
 72mm 3PC Digital Filter Kit UV FLD CPL For Canon EF 28 135mm IS USM Lens $13.79 Time Remaining: 25d 5h 56m Buy It Now for only: $13.79 Buy It Now | Add to watch list |
 White Balance 67mm WB Lens Cap for Digital SLR Camera $16.95 Time Remaining: 29d 7h 37m Buy It Now for only: $16.95 Buy It Now | Add to watch list |
 49mm 3PC Digital Filter Kit UV FLD CPL For Sony NEX 18 55MM Lens $11.99 Time Remaining: 2d 8h Buy It Now for only: $11.99 Buy It Now | Add to watch list |
 58MM HOOD + UV CPL FILTER + WHITE BALANCE CAP + LENS PEN FOR CANON T1i T2i T3i $18.52 Time Remaining: 2d 16h 41m Bid now | Add to watch list |
 52mm 52mm Neutral Density ND4 Filter for 52mm lens of camera kit J015 $3.99 Time Remaining: 2d 1h 32m Buy It Now for only: $3.99 Buy It Now | Add to watch list |
 Tripod Mount Ring for Canon EF 70 300mm f 4 56L IS USM $26.65 Time Remaining: 17d 55m Buy It Now for only: $26.65 Buy It Now | Add to watch list |
 52mm White Balance Disk set custom WB on Nikon D80D300 $12.95 Time Remaining: 25d 11h 12m Buy It Now for only: $12.95 Buy It Now | Add to watch list |
 Combination 52mm Lens Cap + White Balance Diffuser Disk $12.95 Time Remaining: 25d 17h 12m Buy It Now for only: $12.95 Buy It Now | Add to watch list |
 58mm CPL UV filter kit set for Canon EOS 500D Rebel T1i $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon 50mm F 14D Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 BRNO baLens 58mm White Balance Disk Lens Cap New $55.00 Time Remaining: 10d 5h 57m Buy It Now for only: $55.00 Buy It Now | Add to watch list |
 67mm White Balance Disk Lens Cap $13.50 Time Remaining: 9d 9h 55m Buy It Now for only: $13.50 Buy It Now | Add to watch list |
 62mm White Balance Disk Lens Cap $13.50 Time Remaining: 9d 9h 57m Buy It Now for only: $13.50 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon 75 300mm III Lens $9.29 Time Remaining: 1d 12h 21m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 52MM CPL FILTER +LENS HOOD +CAP FOR NIKON D3000 D5000 $17.81 Time Remaining: 16h 11m Bid now | Add to watch list |
 49mm UV CPL Polarized FLD lens filter kit for Sony Alpha Nex 3 Nex 5 $13.99 Time Remaining: 16d 17h 41m Buy It Now for only: $13.99 Buy It Now | Add to watch list |
 58MM LENS HOOD + UV FILTER + CAP FOR CANON 550D 500D $14.49 Time Remaining: 15d 20h 31m Buy It Now for only: $14.49 Buy It Now | Add to watch list |
 Filter Holder+49mm Ring Adapter+New Neutral Density ND8 ND 8 Filter for P Series $14.99 Time Remaining: 7d 15h 55m Buy It Now for only: $14.99 Buy It Now | Add to watch list |
 67mm 3PC Digital Filter Kit UV FLD CPL For Canon EF S 17 85mm IS Lens $12.99 Time Remaining: 25d 5h 56m Buy It Now for only: $12.99 Buy It Now | Add to watch list |
 BlueMan 20M Web cam PC Webcam Computer camera Skype Mic $19.98 Time Remaining: 6d 15h 47m Buy It Now for only: $19.98 Buy It Now | Add to watch list |
 67mm 3PC Digital Filter Kit UV FLD CPL For Nikon AF S 18 105mm VR Lens $13.29 Time Remaining: 25d 5h 56m Buy It Now for only: $13.29 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon D5100 55 200mm VR Lens $8.79 Time Remaining: 1d 12h 21m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Nikon 50mm F 14G Lens $9.29 Time Remaining: 1d 12h 21m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 Filter Holder+52mm Ring Adapter+Gradual Brown tobacco Colour Filter for P series $10.99 Time Remaining: 7d 18h 35m Buy It Now for only: $10.99 Buy It Now | Add to watch list |
 37mm UV FLD PL filter lens kit microfiber for Sony HVR HD1000U HVR A1U HDR CX160 $11.99 Time Remaining: 20d 10h 41m Buy It Now for only: $11.99 Buy It Now | Add to watch list |
 37mm UV FLD PL filter lens kit microfiber for Sony HVR HD1000U HVR A1U HDR CX160 $13.79 Time Remaining: 2d 16h 27m Bid now | Add to watch list |
 55mm UV CPL Polarized FLD filter lens kit for Sony Alpha DSLR A100 A200 A300 $13.49 Time Remaining: 22d 12h 41m Buy It Now for only: $13.49 Buy It Now | Add to watch list |
 New Blue Square Filter TIANYA DSLR lens filter for Cokin P series J242 $6.97 Time Remaining: 3d 20m Buy It Now for only: $6.97 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon D5000 55 200mm VR Lens $8.79 Time Remaining: 1d 12h 21m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 46mm UV CPL FLD filter lens kit for Panasonic HDC HS700 HDC HS900 $9.99 Time Remaining: 12d 7h 41m Buy It Now for only: $9.99 Buy It Now | Add to watch list |
 62mm 3PC Digital Filter Kit UV FLD CPL For Sony18 200MM Lens $13.99 Time Remaining: 2d 8h Buy It Now for only: $13.99 Buy It Now | Add to watch list |
 58mm Polarized PL + UV + FD CAMERA FILTER Kit Set 58 mm $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 58mm 3 PC Filter Kit for Canon Rebel XSi XT T1i 18 55mm $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 Filter Holder+49mm Ring Adapter+ Graduated Sunset Grey Color Filter for P Series $14.99 Time Remaining: 7d 18h 15m Buy It Now for only: $14.99 Buy It Now | Add to watch list |
 49mm 3PC Digital Filter Kit UV FLD CPL For Sony 50MM 18 Lens $11.99 Time Remaining: 2d 8h Buy It Now for only: $11.99 Buy It Now | Add to watch list |
 37MM Telephoto + Wide Angle + Fisheye + UV Filter f Canon Vixia HF10 HF20 HFM31 $54.99 Time Remaining: 21d 17h 48m Buy It Now for only: $54.99 Buy It Now | Add to watch list |
 58MM LENS HOOD + UV FILTER + CAP FOR CANON T1i T2i T3i $13.77 Time Remaining: 1d 15h 11m Bid now | Add to watch list |
 UV ultraviolet FLD CPL Polarized filter lens kit for Nikon D5000 Pentax K10D $14.99 Time Remaining: 11d 17h 41m Buy It Now for only: $14.99 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon EF 50mm F 14 USM Lens $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 62mm 3PC Digital Filter Kit UV FLD CPL For Nikon AF 85mm Lens $13.29 Time Remaining: 25d 5h 56m Buy It Now for only: $13.29 Buy It Now | Add to watch list |
 67mm 3PC Digital Filter Kit UV FLD CPL For Nikon AF S 35mm 14G Lens $13.29 Time Remaining: 25d 5h 56m Buy It Now for only: $13.29 Buy It Now | Add to watch list |
 72mm 3PC Digital Filter Kit UV FLD CPL For Canon EF S 15 85mm F 35 56 IS Lens $12.89 Time Remaining: 25d 5h 56m Buy It Now for only: $12.89 Buy It Now | Add to watch list |
 52mm 3 Filter Kit for Nikon D300s AFS 18 55mm VR Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 67mm 3PC Digital Filter Kit UV FLD CPL For Canon EF 70 300mm Lens $13.99 Time Remaining: 25d 5h 56m Buy It Now for only: $13.99 Buy It Now | Add to watch list |
 55mm 3PC Digital Filter Kit UV FLD CPL For Sony 75 300MM Lens $11.99 Time Remaining: 2d 8h Buy It Now for only: $11.99 Buy It Now | Add to watch list |
 58mm 3 PC FILTER KIT Polarizing polarizer+UV+ FLD 58 MM $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL FOR ANY 52 mm Lens NEW $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 52MM LENS HOOD +UV CPL FILTER + CAP +CLEANING KIT +MICROFIBER FOR NIKON D5100 $18.99 Time Remaining: 3d 16h 11m Bid now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon 24mm F 28D Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon 60D 55 22mm VR Lens $8.79 Time Remaining: 1d 12h 21m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 62mm 3PC Digital Filter Kit UV FLD CPL For Sony HDR V1U $11.99 Time Remaining: 25d 5h 56m Buy It Now for only: $11.99 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Nikon 55 200mm Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon GL2 $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 52mm 3 Filter Kit UV FLD CPL for Canon EF 28mm F 28 Lens $8.79 Time Remaining: 25d 5h 56m Buy It Now for only: $8.79 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Canon 55 250mm IS Image Stabilizer Lens $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 72mm 3PC Digital Filter Kit UV FLD CPL For Canon XL2 XL2S $13.29 Time Remaining: 2d 8h Buy It Now for only: $13.29 Buy It Now | Add to watch list |
 NEW Professional 58mm 3 Piece Kit UV FLD CPL Filters $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
 58mm 3 Filter Kit UV FLD CPL for Nikon 50mm F 18G Lens $9.29 Time Remaining: 25d 5h 56m Buy It Now for only: $9.29 Buy It Now | Add to watch list |
More Great Information on Balance Disk:
Self-stabilizing autonomous bicycle (Hackaday)
For [Gunnar]'s diploma thesis, he wanted to build an autonomous bicycle.
There's an obvious problem with this idea, though: how, exactly does a robotic
bicycle stand upright? His solution to balancing the bicycle was a reaction
wheel that keeps the bicycle upright at all times. A bicycle is basically an
inverted pendulum; something we've seen controlled [...]
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