3.3V USB Converter/Adapter
thingiverse
USB-A male to USB-A female converter/adapter with integrated 3.3V voltage regulator AMS1117-3.3. Can be used to program and power a device like an Arduino with 3.3V. This is useful if you want to run the Arduino with only 3.3V instead of 5V e.g. because 3.3V components are connected (ESP8266, NRF24L01, ...). Also useful to convert a 5V logic level USB-RS232 converter to a 3.3V logic level one (e.g. for ESP8266). Just uploading this to spread the idea of using a 3.3V regulator in the power path of a USB device instead of using level shifters ;) Parts used:http://www.aliexpress.com/item/-/32351569056.html (AMS1117-3.3)http://www.aliexpress.com/item/-/1924302835.html (USB male)http://www.aliexpress.com/item/-/1228315433.html (USB female)http://www.aliexpress.com/item/-/1554364460.html (10µF caps, optional, depending on application)
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