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ROB-12629 Wheel Encoder Kit
ROB-12629 Wheel Encoder Kit
US$18.13
Each wheel encoder kit consists of two neodymium 8-pole magnets with rubber hubs and two hall-effect sensors terminated with 150mm cables and 3-pin female servo headers. These wheel encoders require a supply voltage of 3-24V with a supply current of 4mA.
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DFR0251 16A Relay Module (Arduino Compatible)
DFR0251 16A Relay Module (Arduino Compatible)
US$20.93
The 16A relay module can be used in interactive projects. It can also be used to control the lighting, electrical and other equipments. It can be controlled through the digital IO port, such as solenoid valves, lamps, motors and other high current or high voltage devices.
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1489-ADA Tactile Switch Buttons (6mm slim) x 20 pack
1489-ADA Tactile Switch Buttons (6mm slim) x 20 pack
US$8.67
These are half the width of classic 6mm tactile switches so they line up better on a breadboard, just plug them into every-other row. These work best in a PCB but can be used on a solderless breadboard. The two pins are normally open (disconnected) and when the button is pressed they are momentarily closed.
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1490-ADA Tactile Switch Buttons (6mm tall) x 10 pack
1490-ADA Tactile Switch Buttons (6mm tall) x 10 pack
US$5.69
These work best in a PCB but can be used on a solderless breadboard. The pins are normally open (disconnected) and when the button is pressed they are momentarily closed. These are extra tall which are useful when putting your project in an enclosure and you want the buttons to stick out.
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VEL-MAGNET6 Magnet Ø12 x 3mm - 6 pcs
VEL-MAGNET6 Ø12 x 3mm - 6 pcs Rare Earth Magnet
US$12.53
Features: Barrel-shaped Plated with bright Nickel for added durability Very powerful magnets Permanent magnetic strength Specifications: Material: rare earth (Neodymium) Rating: N35 ~ N45 Dimensions: Ø31/64" x 1/8".
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VEL-MAGNET8 Magnet Ø10 x 5mm - 10 pcs
VEL-MAGNET8 Ø10 x 5mm - 10 pcs Rare Earth Magnet
US$23.80
Features: Barrel-shaped. Plated with bright Nickel for added durability. Very powerful magnets. Permanent magnetic strength. Specifications: Material: rare earth (Neodymium). Rating: N35 ~ N45. Dimensions: Ø13/32" x 13/64".
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VEL-MAGNET7 Magnet Ø18 x 3mm - 3 pcs
VEL-MAGNET7 Ø18 x 3mm - 3 pcs Rare Earth Magnet
US$11.13
Features: Barrel-shaped. Plated with bright Nickel for added durability. Very powerful magnets. Permanent magnetic strength. Specifications: Material: rare earth (Neodymium). Rating: N35 ~ N45. Dimensions: Ø23/32" x 1/8".
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FIT0324 Encoder Adapter
FIT0324 Encoder Adapter
US$6.25
This adapter is especially designed for DFRobot 12V DC Motors.
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VEL-VR15M121C Miniature Relay- 15A/28VDC-125VAC 7A/220VAC 1 x inverter 12Vdc
VEL-VR15M121C Miniature Relay- 15A/28VDC-125VAC 7A/220VAC 1 x inverter 12Vdc
US$2.79
Coil voltage: 12V DC. Coil resistance: 360ohm. Contact: 1 x inverter. Nom. power consumption: 450mW. Dielectric strength: 1000V / 50Hz (1 minute). Temperature range: -40°F to 158°F. Internal contact material: AgCd0.
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VEL-TV4 Piezo Transducer 30Vac 0.5-20Hz 75dB LEAD TYPE
VEL-TV4 Piezo Transducer 30Vac 0.5-20Hz 75dB LEAD TYPE
US$2.27
The piezoelectric ceramic buzzer has a simple structure in which a ceramic piezo-element is glued to a vibration plate.
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VEL-SV/PS1 Mini Piezo Siren 6-15VDC / 140mA 107dB W/Leads
VEL-SV/PS1 Mini Piezo Siren 6-15VDC / 140mA 107dB W/Leads
US$8.33

Specifications: ABS. Wired siren. Operating voltage: 6-15Vdc. Current consumption (at 12Vdc with siren): 200mA. Oscillating frequency: 1.5-3.5kHz. Sound pressure level (at 1m): 107dBA. Dimensions: 1.5" x 1.7" x 2.2". Mounting holes: 0.87".

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PBS-A-105 16mm Panel Mount Momentary Pushbutton - Black
PBS-A-105 16mm Panel Mount Momentary Pushbutton - Black
US$1.84
It's not that exciting, no LEDs, no bells & whistles. But we really like it anways, look at that lovely rounded shape, that elegant bevel. If you're going to go with a momentary pushbutton, let it be this one! 
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PBS-A-110 16mm Panel Mount Momentary Pushbutton - Green
PBS-A-110 16mm Panel Mount Momentary Pushbutton - Green
US$1.99
It's not that exciting, no LEDs, no bells & whistles. But we really like it anways, look at that lovely rounded shape, that elegant bevel. If you're going to go with a momentary pushbutton, let it be this one! 
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PBS-A-115 16mm Panel Mount Momentary Pushbutton - Yellow
PBS-A-115 16mm Panel Mount Momentary Pushbutton - Yellow
US$1.99
It's not that exciting, no LEDs, no bells & whistles. But we really like it anways, look at that lovely rounded shape, that elegant bevel. If you're going to go with a momentary pushbutton, let it be this one! 
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VEL-R13244BG/LED Green LED Illuminated Rocker Switch 2P DPST /ON-OFF 12V
VEL-R13244BG/LED DPST /ON-OFF Green LED Illuminated Rocker Switch 2P 12V
US$5.53

Specifications: Illumination: Green LED (12V). Contact rating: 16A/ 12Vdc. Electrical life: 20000 cycles. Mechanical life: 50000 cycles. Contact resistance: 50mohm. Insulation resistance: min. 100Mohm at 500Vdc. Dielectric strength: 1500Vac / 1 minute.

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