Recently I bought a little gizmo called as “USB Charger Doctor” from an online store. The little usb bus powered device features a passthrough usb connection to connect the usb source port and usb ...

C1, C2, C3, and C4 are used to reduce the supply noise. D1 is an LED that indicates a proper supply (Type-C cable) connection. R1 limits the current to the LED. CON1 is a Type-C female USB connector.

In their project, [Septillion] and [Hugatry] use a 3.3 V Arduino Pro Mini to talk to the charger in question through a small circuit consisting of a few resistors and diodes.

The USB charging circuit runs through the coat hanger, using some conductive cloth and steel thread in the inside of the jacket’s shoulders.

Charging a supercapacitor from a 5V USB port may seem simple at first, but to charge three supercapacitors to 7V and to limit the input current to the 500 mA maximum limit on the USB port is somewhat ...

There’s one USB-C port (supporting 3A output, which Nomad claims is enough to support quick-charging on an iPhone X assuming you’ve got a Lightning to USB-C cable handy), one USB Type-A (2.4A ...

There are already a bunch of USB-C car chargers available; they retail for around $10 to $15, and many of them even support the quick-charging features of advanced USB-C devices like the Nexus 6P ...

If the extension uses 28AWG wire (which seems to be typical per Google) the total resistance in the charging circuit will be increased by 1.3Ω (28AWG wire is 64.9Ω per 1000', and you're adding ...

You’ll need a few components to get this project going, like a soldering iron, some rechargeable AA batteries, a 4V or higher solar panel (the project calls for this one), a USB charging circuit ...