An exciting development from Shea Silverman’s Blog: induction powered Pi!
So I said I had some cool hardware to show off today, and here it is: Seeed Studio’s Wireless Charging Module.
This kit uses inductive charging to transfer power “wirelessly” from one coil to the other. You put in 12v 1A on the transmitter end, and on the other end you get 5v 0.6A.
I initially had some trouble getting it setup. I was trying connectors in every different position, every combination I could think of. It took me a day to realize my power supply was set to 9v rather than 12v. Once I upped the voltage, I could hold the coils an inch away from each other and still keep a charge. I also tried putting things in between the coils to see how much interference it could take. It had no problems with a coupon book, business cards, a small plastic mint case, though it did have issues being between a remote.
Now, me being me, I had to try this with the Raspberry Pi, and I knew I had to do something special. My coworker Mike has been fiddling with bare metal assembly on the Pi, and has ported NyanCat to the system. His github repo with the source assembly code and pre built binary is available here.
By connecting the receiver coil to the 5v and GND GPIO pins, I was able to wirelessly power the Pi….
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