Sparkfun

CA$8.05
This is a wireless transmitter to work with our 434MHz receiver. They can easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link.
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CA$10.18
This is a wireless receiver to work with our 434MHz transmitter. They can easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link.
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CA$12.23
This is a 2.4GHz Duck Antenna 2.2dBi with Reverse Polarized - SMA RF connector. Perfect for prototyping with our RF ICs. 50 ohm impedance. 4" long.
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CA$15.31
This is a 2.4GHz Large Duck Antenna 5dBi with Reverse Polarized - SMA RF connector. Perfect for prototyping with our RF ICs. 50 ohm impedance.
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CA$13.14
This is a 900 - 1800 MHz Duck Antenna 2dBi with regular Reverse Polarized -SMA RF connector. Perfect for use with the XBee 900MHz units. 50 ohm impedance. 105mm long.
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CA$7.62
Cable interfaces UFL RF connectors to RP-SMA antennas. Use it to attach any standard RP-SMA 2.4GHz antenna to the DPAC 802.11 modules. Dimensions: 4" Length.
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CA$7.62
This is a 4" connector cable that interfaces U.FL RF connectors to regular SMA connections.
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CA$2.76
This is a coin cell holder for the common CR2032 type battery. The holder has a neat pop-in, pop-out feature that makes changing the battery easy. The feet of the holder have a small hole that allow it to be sewn without modification.
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CA$28.71
This is a 36" high temperature Type-K Thermocouple with glass braid insulation. Features: Type-K Thermocouple (Ni-Cr). 30 gauge stripped and prepped wires. Thermocouple range : -270 to +1372C (-454 to +2501F). Glass braid insulation range : -73 to +482C(-100 to +900F). Yellow + / Red -. 
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CA$16.85
This is a relative humidity sensor module comprised of a capacitive type humidity sensor, a CMOS capacitor to frequency converter and an EEPROM used to hold the calibration factors. Due to the characteristics of capacitor type humidity sensor, the system can respond to humidity change very quickly.
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CA$7.85
This is a breakout board for the TEMT6000 Ambient Light Sensor. Only what you need, nothing you don't. Sensor acts like a transistor - the greater the incoming light, the higher the analog voltage on the signal pin.
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CA$2.30
This is an integrated Hall effect latched sensor. Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor.
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CA$3.00
Side-looking Infrared Emitters and IR Detectors. These simple devices operate at 940nm and work well for generic IR systems including remote control and touch-less object sensing.
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CA$2.31
This is a 3-pin JST connector with red, black, and yellow wire colors cut to a length of 5 inch out. This cable comes fully assembled as shown and connects directly to many different Sharp sensors. Quick and easy, this cable will save you 15-20 minutes over making your own wiring harness.
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CA$3.07
A simple breakout PCB for the GP1A57HR photo interrupter. This PCB has three connections for PWR, GND, and Signal. When the gate is clear, SIG will be high (>4.9V). When the gate is blocked by a finger, writing utensil, food pellet, or anything else - SIG will go low (<0.4V).
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