Hello,
I am currently working on a wireless charger project, where I am to use a 120/24V transformer as a power source to create a wireless charger module for a regular 5V/<1A USB output plug. I have attached my transmitter circuit below. I am using a colpitts oscillator using a pair of 0.1uF caps and a 100uH inductor to produce a 73 kHz frequency. I am also getting a 11.4Vpp output. I have a couple questions if anyone can help.
1) Where would I connect the other end of my transmitter coil? I get a output from the oscillator circuit but I dont know where to connect the other end to.
2) Is 11.4Vpp enough to power my charger at the transmitter side? It is going through a bridge rectifier to a 5V regulator to a female usb plug.
3) Anyone have a suggestion to improve this circuit? I heard a MOSFET would help in place of the BJT but how would taht affect my circuit?
Thank you for the help in advance! I am working solo on this and any help would be appreciated
I am currently working on a wireless charger project, where I am to use a 120/24V transformer as a power source to create a wireless charger module for a regular 5V/<1A USB output plug. I have attached my transmitter circuit below. I am using a colpitts oscillator using a pair of 0.1uF caps and a 100uH inductor to produce a 73 kHz frequency. I am also getting a 11.4Vpp output. I have a couple questions if anyone can help.
1) Where would I connect the other end of my transmitter coil? I get a output from the oscillator circuit but I dont know where to connect the other end to.
2) Is 11.4Vpp enough to power my charger at the transmitter side? It is going through a bridge rectifier to a 5V regulator to a female usb plug.
3) Anyone have a suggestion to improve this circuit? I heard a MOSFET would help in place of the BJT but how would taht affect my circuit?
Thank you for the help in advance! I am working solo on this and any help would be appreciated
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