Jesus Echavarria wrote a how-to on adding a USB power port to a switch: I want to start some projects with Arduino and IoT, so the first things I need is an Arduino board, an Ethernet shield and a switch to connect it to the net. Also I need a power supply for the Arduino board, […]
Tag Archives: USB port
App note: Dynamic siphon steals current from USB port
rsdio tipped us to an app note on USB-port power: Very cool! This is like an audio ducking compressor for voiceovers, but for charging. This circuit exploits all the power available from a USB port by dynamically adjusting the amount of current delivered to the load, thereby siphoning a relatively constant (and maximum) current from the […]