Non-bus powered bare schematic

General discussions about V-USB, our firmware-only implementation of a low speed USB device on Atmel's AVR microcontrollers
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kyoo

Non-bus powered bare schematic

Post by kyoo » Tue Feb 19, 2008 10:53 pm

Can someone point to a simple non bus powered schematic? I don't need you to show the outputs, or the sip interface, just the hardware that avr-usb needs to work on external (5v) power. (The chip I have on hand is a atmega324p, but any chip would be fine.)

Is there a tutorial somewhere I'm missing, or do I just have to read the source to PowerSwitch and hope I catch it all?
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kyoo

Re: Non-bus powered bare schematic

Post by kyoo » Wed Feb 20, 2008 12:16 am

Wow, I should have previewed that: I mean there's no need to show other outputs the circuit is controlling, or the ISP interface.
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christian
Objective Development
Objective Development
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Joined: Thu Nov 09, 2006 11:46 am

Post by christian » Thu Feb 21, 2008 10:17 pm

PowerSwitch actually IS an externally powered device. In order to circumvent some problems when only one power supply is available, the AVR is ALSO powered from the USB.
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