On Tue, Nov 16, 2010 at 11:19 AM, C. Scott Ananian csc...@laptop.org wrote:
On Mon, Nov 15, 2010 at 4:19 PM, fors...@ozonline.com.au wrote:
Just make sure you keep in mind the difference between the specification
and what is likely to be acceptable. One value is better suited to
personal
On Tue, Nov 16, 2010 at 11:38 AM, Walter Bender walter.ben...@gmail.com wrote:
On Tue, Nov 16, 2010 at 11:19 AM, C. Scott Ananian csc...@laptop.org wrote:
On Mon, Nov 15, 2010 at 4:19 PM, fors...@ozonline.com.au wrote:
Just make sure you keep in mind the difference between the specification
Scott
Thanks for your comments. As this is now more a discussion on
education, I have copied to IAEP.
Background for the IAEP list:
Suggested experiments for using TurtleArt with external sensors are at
http://wiki.sugarlabs.org/go/Activities/TurtleArt/Using_Turtle_Art_Sensors
The
In Tony's defense, he was reminding us to fix what was
an acknowledged omission in XO-1 (the C3 motherboard
which fixed it was never put into production). We never
reflected the change in the 1.5 specs, causing further confusion.
I apologize for accepting an 0402 for the current limiting
This was done starting with the XO-1.5, and will also be
done on the 1.75.
Regards,
wad
On Nov 13, 2010, at 3:55 AM, fors...@ozonline.com.au wrote:
I would like to make a request for a protection resistor between the
microphone socket and the protection zener diode on the 1.75 so it can
This was done starting with the XO-1.5, and will also be
done on the 1.75.
thanks
what is the allowable input voltage, i dont think its on the wiki?
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From the XO-1.5 hardware spec at
http://wiki.laptop.org/images/f/f0/CL1B_Hdwe_Design_Spec.pdf
2.7.4 External Microphone Input
A stereo jack is provided on the laptop for connecting an external microphone,
switch, or other sensor. This jack is connected to the audio codec’s microphone
input,
The published XO-1.5 spec is very conservative.
But unfortunately, layout concerns prevented me from
providing too much protection. The parts used (1/16W)
should protect up to 9V continuously, and up to
higher voltages for shorter periods of time.
With excessive voltage, the protective
From the XO-1.5 hardware spec at
http://wiki.laptop.org/images/f/f0/CL1B_Hdwe_Design_Spec.pdf
2.7.4External Microphone Input
.
An external voltage applied to this input is limited to between 0 and 3.5 V.
Inputs exceeding this range may cause excessive current to flow through a
The published XO-1.5 spec is very conservative.
But unfortunately, layout concerns prevented me from
providing too much protection. The parts used (1/16W)
should protect up to 9V continuously,
ignore previous mail, question answered
thats +-9V?
Just make sure you keep in mind the difference between the specification and
what is likely to be acceptable. One value is better suited to personal
tinkering, the other to widespread propagation.
- Ed (who was disappointed to learn this weekend that Zener is not in
the official
Just make sure you keep in mind the difference between the specification and
what is likely to be acceptable. One value is better suited to personal
tinkering, the other to widespread propagation.
Good point. As background to my questions Turtle Art 103 now supports sensor
input.
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