For when you need to inject power into a USB cable from a different sourceDesigned by Muxtronics, Ships from Netherlands
This very simple device allows you to inject power from an independent source - a lab power supply, battery, powerbank or solar panel - into a USB cable. I originally made it for my (pending) prog...Read More…
This very simple device allows you to inject power from an independent source - a lab power supply, battery, powerbank or solar panel - into a USB cable.
I originally made it for my (pending) programmable powerbank project, which both charges and communicates over USB. Unfortunately, most PCs only allow 500mA of current over the USB port. So if I wanted to charge my powerbank at full bore AND still communicate with the PC, I had to use my lab power supply for power while still keeping the D+/D- data lines connected. That's why I made this little PCB.
The board accepts three connections: A USB Micro-B input carrying the data signal, a pluggable screw terminal (very handy!) to supply the power and a USB type-A output that combines data and power to your device.
Be very careful when wiring power to the screw terminal! It only fits in one way, but you still have to screw in the power at the right polarity. Double-check with the silk-screened '5V' and 'GND' markings. Also make sure the input voltage is neither too low nor too high for your device - USB generally requires 4.5-5.5V on the power lines. Do something wrong here and you can blow up your USB device!
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PostNL: Untracked standard shipping (Non-EU)
2-6 weeks typical delivery time
PostNL: Registered Post (non-EU)
Typically takes 2-6 weeks to deliver Tracking only applies to: Entire EU, Russia, Cyprus, Japan, Saudi Arabia, South Korea, Singapore, Croatia, Taiwan (Chinese Taipei), Gibraltar, Malaysia, Turkey, Malta, United Kingdom, Hong Kong, China, Moldova, United States of America, Nigeria, Switzerland, Indonesia, Iran. Other countries may have no or partial tracking. If you wish to have you package tracked up to your destination and you do NOT live in the EU or one of the countries listed above, please contact me.
DHL: DHL Express Small Parcel
Next-day delivery in most countries!
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Hey there! Like most people on this website I make electronics. In fact, I design a *lot* of electronics, over 100 designs per year. Most of them I make for me or for customers. Sometimes, I find a design so handy that I like to share it with others. For that, there is my Tindie store. My name is mux by the way, and I don't just make electronics, I make muxtronics!
As for more of my background: I am an electronic design engineer by trade and mostly design power electronics - that is: dc/dc converters, AC power supplies, power measurement equipment, electronic loads and the like. Aside from that I have a fairly broad engineering education and background, which means I like to do systems design, design for manufacturing, build enclosures using a variety of methods and so on.
I also blog and vlog, so check me out on my website: https://muxtronics.nl