Adafruit

US$7.00
These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter.
Delivery within 2-3 weeks
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US$7.23
This proto-board is the PCB you always wish you had, but never realized it! We took the basic layout of a half-sized breadboard and turned that into a beautiful PCB. The top side has a white silkscreen, and the same markings you're familiar with, to make transferring components easy.
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US$7.23
The ADAFRUIT 5545 is a GPIO Expander Breakout - an affordable 8-channel I2C expander.
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US$7.23
The Adafruit LTR-303 Light Sensor a simple and popular low-cost I2C digital light sensor that is easy to integrate into your project for reliable and wide-ranging light measurements.
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US$7.23
The Adafruit LTR-329 Light Sensor a simple and popular low-cost I2C digital light sensor that is easy to integrate into your project for reliable and wide-ranging light measurements.
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US$7.43
This rotary encoder is the best of the best. It is a high quality 24-pulse encoder, with detents and a nice feel. It is panel mountable for placement in a box, or you can plug it into a breadboard (just cut/bend the two mechanical side tabs.) We also include a nice soft-touch knob with an arrow in it, fits perfectly and looks great.
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US$7.49

Compatible with both male and female wires, these fully customizable wire housings bring DIY to a new level, giving you near limitless options when using jumper wires in your project. This is a pack of small, dual row housings. This pack includes: 5 x 2x2 housing, 5 x 2x3 housing, 5 x 2x4 housing, 5 x 2x5 housing, 5 x 2x6 housing. 

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US$7.61
A button is a button, and a switch is a switch, but this LED illuminated arcade buttons is in a class of its own. Its the same size as a 'standard' 30mm arcade but has a built in LED that can be controlled separately from the switch action - either to indicate or just to look good. 
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US$7.62
The heat sink is a 0.25" x 0.25" (6.5mm x 6.5mm) square with 9 little 'fins' sticking out the top. The total height is 0.15" (3.65mm) so it will fit in any case or enclosure. They even come with a bit of thermal tape already on the bottom! Ideal for medium flat BGAs, TSSOPs, QFNs, etc!
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US$7.62
Connect this to that without soldering using these handy mini alligator clip test leads. 5" overall cables with alligator clip on each end, color coded. You get 12 pieces in 6 colors. Strong and grippy, these always come in handy! We often use these in conjunction with a multimeter so we don't have to hold the probes in place.
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US$7.62
These great looking LEDs are also fast and responsive with diffused color that will make your project glow! 
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US$7.62
This is the FeatherWing Proto - a prototyping add-on for all Feather boards. Using our Feather Stacking Headers or Feather Female Headersyou can connect a FeatherWing on top or bottom of your Feather board and let the board take flight!
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US$7.62
These Simple RF receivers are the easiest way possible to add wireless control, painlessly! There's no programming, configuring or addressing - simply power the receiver with 5-10VDC and press the buttons on our matching RF keyfob remote. When the A button is pressed, it activates the first pin, when the B button is pressed, it activates the second one, and so forth for all four buttons. There's no microcontroller required, its just a simple one-to-one link.
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US$7.63
This I2C digital temperature sensor is one of the more accurate/precise we've ever seen, with a typical accuracy of ±0.25°C over the sensor's -40°C to +125°C range and precision of +0.0625°C.
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US$7.63
The Adafruit TPL5110 Power Timer is a stand-alone breakout that will turn any electronics into low-power electronics! It will take care of turning your project on/off using a built in timer that can vary from once every 100ms up to once every two hours. Basically, the TPL will turn on periodically, adjustable by potentiometer or resistor, and turn on your project's power. It will then wait until a signal is received from the project to tell the TPL that it can safely turn off the power. If the TPL does not receive a signal by the set time-out, it will reset the device like a watchdog timer.
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