Re: [softrock40] Re: I2C problem?
----- Original Message -----
Subject: [softrock40] Re: I2C problem?
> Details? This seems like a good idea. Are there any downsides?
> > --- In firstname.lastname@example.org, "Alan" <alan4alan@...> wrote:
>> Looking at it from a different point of view the 5V USB line can be
>> completely. I power the AVR directly from the Softrock. Then the Softrock
>> will start on your favourite preset frequency with, or without, the USB
>> When USB is connected it is recognised and operates normally.
I can hardly claim this is a tried and trusted method, as far as I know I am
the only one to have tried it.
I have 4 Softrock Lites to which I have added an Si570. These are used for
long-term monitoring on a single frequency, I just need to set the frequency
and may not need to change it for a long while. Recently I added USB
controllers saving me the need to reprogram the PIC.
After setting and storing the frequency with CGFSR I need them to start with
the AVR powered up but do not need a USB connection. So, effectively I have
removed and insulated the red 5V wire from the USB plug. From where it was
connected on the USB controller I connected to the Softrock power. I
actually used the 3V3 supply but the 5V rail would be better. I have found
that the controller does not need to be powered by the USB line, when
connecting USB it is recognised and works normally.
73 Alan G4ZFQ