Adafruit

US$17.24
This Mini External USB 2.0 Speaker does not require or use a 3.5mm audio jack. You'll get great audio, even with a device that doesn't have a head phone jack. And since it is powered over USB, there's no need to charge it by other means, merely plug it into your desired device's USB port and listen to the audio flow. Compact and convenient to carry, it's simple and practical. With 2 built-in speakers and no battery or adapter needed, this plug-and-play speaker is perfect if you need a quick and portable audio solution.
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US$22.67
For precision temperature sensing, nothing beats a Platinum RTD. Resistance temperature detectors (RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes, basically a kind of thermistor. In this sensor, the resistor is actually a small strip of Platinum with a resistance of 100 ohms at 0°C, thus the name PT100. Compared to most NTC/PTC thermistors, the PT type of RTD is much most stable and precise (but also more expensive) PT100's have been used for many years to measure temperature in laboratory and industrial processes, and have developed a reputation for accuracy (better than thermocouples), repeatability, and stability.
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US$21.79
For precision temperature sensing, nothing beats a Platinum RTD. Resistance temperature detectors (RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes, basically a kind of thermistor. In this sensor, the resistor is actually a small strip of Platinum with a resistance of 100 ohms at 0°C, thus the name PT100. Compared to most NTC/PTC thermistors, the PT type of RTD is much most stable and precise (but also more expensive) PT100's have been used for many years to measure temperature in laboratory and industrial processes, and have developed a reputation for accuracy (better than thermocouples), repeatability, and stability.
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US$34.92
The Bluefruit LE SPI Friend makes it easy to add Bluetooth Low Energy connectivity to anything with 4 or 5 GPIO pins. With SPI, you don't have to worry about baud rates, flow control, or giving up a hardware UART port. Connect to your Arduino or other microcontroller using the common four-pin SPI interface (MISO, MOSI, SCK and CS) plus a 5th GPIO pin for interrupts (to let the Arduino know when data or a response is ready).
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US$5.17
This here is your standard A-microB USB cable, for USB 1.1 or 2.0. Perfect for connecting a PC to your Arduino Leonardo and Raspberry Pi (among other things). Approximately 6.5" long from end to end. Its a little more compact than our classic 3' long cable.
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US$6.92
Now you can hook up your LiPo Charger or a Arduino Micro/Leonardo/Raspberry Pi using the same cable. Approximately 8" long from end to end. This cable does not contain a hub, so you can only connect one USB device at a time (to either end). The micro end does data and power, the mini side only does power (not data).
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US$34.92
This is the LoRa 9x @ 900 MHz radio version, which can be used for either 868MHz or 915MHz transmission/reception - the exact radio frequency is determined when you load the software since it can be tuned around dynamically. These are +20dBm LoRa packet radios that have a special radio modulation that is not compatible with the RFM69s but can go much much farther. They can easily go 2 Km line of sight using simple wire antennas, or up to 20Km with directional antennas and settings tweakings.
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US$6.92
Our Raw Male/Male Jumper Wires are perfect for making a custom jumper wire sets for wire harnesses or jumpering between headers on PCB's. These premium jumpers are a little over 6" (150mm) long and come in a 'strip' of 40 (4 pieces of each of the ten colors).
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US$5.17
Our Raw F/F Jumper Wires are perfect for making custom jumper wire sets for wire harnesses or jumpering between headers on PCB's. These premium jumpers are a little over 6" (150mm) long and come in a 'strip' of 40 (4 pieces of each of the ten colors).
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US$5.17

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 large, single row housings. This pack includes: 5 x 1x6 housing, 5 x 1x7 housing, 5 x 1x8 housing, 5 x 1x9 housing, 5 x 1x10 housing. 

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US$3.42

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$3.42

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, single row housings. This pack includes: 10 x 1x1 housing, 10 x 1x2 housing, 10 x 1x3 housing, 10 x 1x4 housing, 10 x 1x5 housing.

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US$7.88
Make your own custom DE-15 cable or DE-15 interface with ease, using this DE-15 Socket to Terminal Block Breakout. You get a nice solid PCB with an DE-15 socket and two strips of terminal blocks that you can use with stranded or solid core wire to quickly assemble your own wiring jigs.
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US$35.42
This is our take on an microcontroller with a RFM69HCW packet radio transceiver plus built in USB and battery charging. Its an Adafruit Feather M0 with a 900MHz radio module cooked in! We have other boards in the Feather family, check'em out. This is the 900 MHz radio version, which can be used for either 868MHz or 915MHz transmission/reception - the exact radio frequency is determined when you load the software since it can be tuned around dynamically.
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US$9.45
We now have an all in one digital audio amp breakout board that works incredibly well with the Raspberry Pi! If you're looking for an easy and low cost way to get you digital sound files bumpin' then the MAX08357 I2S Amp Breakout is for you. It takes standard I2S digital audio input and, not only decodes it into analog, but also amplifies it directly into a speaker. Perfect for adding compact amplified sound, it takes 2 breakouts (I2S DAC + Amp) and combines them into one.
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