I came across this while looking for a schematic for the Sonicare (toothbrush) inductive charger, figuring on stealing their ideas, and it was recently on the forum.
It is a paper on combining inductive charging with data transfer across the charging air gap. Nice application might be a sealed waterproof data logger or something of that sort - or just to tell you the battery at the point of use is fully charged and to turn off the charger. Only 300 baud bidirectional, 85 Khz carrier, 16 watts (!).
From the abstract:
"A bidirectional communications system operates between the base station and
connected pickups, and uses the same inductive link that transfers power.
Forward communication uses amplitude shift keying to modulate data, while for
reverse communication the pickup varies the load to change the reflected voltage
at the base station."
www.instructables.com/files/orig/FK9/HKLG/FAQDX9YM/FK9HKLGFAQDX9YM.pdf
Its a little thin on ready to build schematics, but there's a lot of good info here if inductive (wireless) charging or data is you game.
Another paper on microcontroller inductive power transfer (100 ma/3 volts) with schematics and values
http://dx.eng.uiowa.edu/power supply paper.pdf
"Continuous, Inductively Charged Power Supply for Portable Embedded
Applications"
It is a paper on combining inductive charging with data transfer across the charging air gap. Nice application might be a sealed waterproof data logger or something of that sort - or just to tell you the battery at the point of use is fully charged and to turn off the charger. Only 300 baud bidirectional, 85 Khz carrier, 16 watts (!).
From the abstract:
"A bidirectional communications system operates between the base station and
connected pickups, and uses the same inductive link that transfers power.
Forward communication uses amplitude shift keying to modulate data, while for
reverse communication the pickup varies the load to change the reflected voltage
at the base station."
www.instructables.com/files/orig/FK9/HKLG/FAQDX9YM/FK9HKLGFAQDX9YM.pdf
Its a little thin on ready to build schematics, but there's a lot of good info here if inductive (wireless) charging or data is you game.
Another paper on microcontroller inductive power transfer (100 ma/3 volts) with schematics and values
http://dx.eng.uiowa.edu/power supply paper.pdf
"Continuous, Inductively Charged Power Supply for Portable Embedded
Applications"