jidagraphy
Active member
I'm not too familiar with circuitry so please excuse my lack of knowledge
So I've got a USB Host Board mini from this site http://www.hobbytronics.co.uk/midi-player-tutorial
and following the guide to connect the usb host board to teensy, except that I am not using the
audio adaptor anymore.
But where it says "We need to supply the USB Host board with 5V and GND from the Teensy board"
really confuses me. As far as how I understand, teensy 3.2 only provides v3.3, no?
So I use my best guess to connect the 3.3v out from teensy to a pin named 3v3 on the usb Host Board. It works.
I try connecting 3.3v from teensy to 5v on the USB Host Board. Oddly it works. I'd would have guessed that it wouldnt.
I try connecting Vin from teensy to 5v on the USB Host board. It works. I thought Vin only takes in power from batteries
or any external power supply........?
(btw im using usb connection to supply power to the teensy)
I could have stopped where it works, but the USB Host Board introduces a constant hum when connected to a device.
And I'm on my way to deduce where this is coming from so I'm trying to understand how power supplies work.
Thanks in advance !
So I've got a USB Host Board mini from this site http://www.hobbytronics.co.uk/midi-player-tutorial
and following the guide to connect the usb host board to teensy, except that I am not using the
audio adaptor anymore.
But where it says "We need to supply the USB Host board with 5V and GND from the Teensy board"
really confuses me. As far as how I understand, teensy 3.2 only provides v3.3, no?
So I use my best guess to connect the 3.3v out from teensy to a pin named 3v3 on the usb Host Board. It works.
I try connecting 3.3v from teensy to 5v on the USB Host Board. Oddly it works. I'd would have guessed that it wouldnt.
I try connecting Vin from teensy to 5v on the USB Host board. It works. I thought Vin only takes in power from batteries
or any external power supply........?
(btw im using usb connection to supply power to the teensy)
I could have stopped where it works, but the USB Host Board introduces a constant hum when connected to a device.
And I'm on my way to deduce where this is coming from so I'm trying to understand how power supplies work.
Thanks in advance !