Adafruit is an online store synonymous with the word “maker”. They sell electronic parts and kits to “make” gadgets that in most cases you can buy fully built. For example their MintyBoost is a $20 AA to USB charger you “make” yourself and it doesn’t work on all phones. However for $5, You can buy an already-assembled similar gadget on Ebay (screenshot).
Another example is this WiFi adapter designed to work with Linux systems like the Raspberry Pi and the BeagleBone Black.
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