Populated IrDA?

2008-02-28 Thread Alan Ide
I see in the tech specs of the FreeRunner that the CPU has IrDA built in,
but I cant find anything listed in the specs that shows it as being used.
However I saw a youtube interview the other day that I believe had a passing
mention about it being available for use. Could someone please let me know
if it is or is not populated / usable?? I really want to be able to use my
FreeRunner as my universal remote using LIRC. Thank you.

Alan
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Re: Populated IrDA?

2008-02-28 Thread joerg
Am Do  28. Februar 2008 schrieb Alan Ide:
 [...] Could someone please let me know
 if it is or is not populated / usable?? I really want to be able to use my
 FreeRunner as my universal remote using LIRC. 
+1
Though i think there's no way to have an IrDA inside GTA01 (OT, i know) for 
there's no specs for any IR-window in the case.
Maybe related(also GTA01, no schematics;-( for 02): what's the use of TX-IRDA, 
RX-IRDA on 1.  2. ring of headset connector(3,4), ending on GSM-module pins 
of same name, enabled by pulling 3. ring to GND (4.ring, base)? How is this 
supposed to be used? In case of an external IR-adapter: where to take TX-LED 
power from? I suppose mic bias (2k2) won't suffice.
Near OT: what's Hold on 3. ring of same connector supposed to signal to CPU? 
RC (A/D - R-cascade. in case: supposed R-values?)?
An application sample for full featured external (RC-)headset / other 
(IR-)device(s) might help!

completely OT: ambient light sensor? (PCU is supposed to support...)

jOERG

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Re: Populated IrDA?

2008-02-28 Thread joerg
Am Do  28. Februar 2008 schrieb joerg:
 Near OT: what's Hold on 3. ring of same connector...
Sorry: Hold on 1.ring aka tip / MIC. 
3. ring = jack insert sense / LOut (/ IR_enable).

j

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Re: Populated IrDA?

2008-02-28 Thread Shawn Rutledge
On Thu, Feb 28, 2008 at 10:33 AM, Alan Ide [EMAIL PROTECTED] wrote:
 if it is or is not populated / usable?? I really want to be able to use my
 FreeRunner as my universal remote using LIRC. Thank you.

IrDA and CIR (consumer IR) are usually not the same thing.  If you
start looking for the actual components you'll see there are several
wavelengths of light in use.  OTOH the phototransistors used in the IR
receivers are sensitive to a range of wavelengths (sensitivity vs.
wavelength is a bell curve), so they don't always have to match
exactly.

The Agenda (an early Linux PDA back in 1999 or 2000) had a CIR emitter
for just that purpose.  It was also possible to use the Palm's IrDA
port for remote-controlling your TV etc. but the range was very short,
like 3 feet or less.  Another company was selling a CIR emitter you
could plug into the HotSync port to get longer range.

Of course if you install an IrDA transceiver in your PC, you could use
an IrDA handheld as a remote for it.  But then why not use Bluetooth
or WiFi?  IR is too directional.

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