HP Forum Archive 14

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Anyone has remote control software for the 49G+? Message #1 Posted by Chan Tran on 7 Oct 2004, 12:47 p.m. Thinking about buying one of these and it hit me that if I really hate it may be I can use it as a programmable remote control for TV etc...? I have a remote package that run on the 48GX very well. For $139 it is relatively cheap for a remote control.

Re: Anyone has remote control software for the 49G+? Message #2 Posted by karl on 7 Oct 2004, 1:53 p.m., in response to message #1 by Chan Tran no software able, and Irda mode is not the same as used in the 48G series. Bye

Re: Anyone has remote control software for the 49G+? Message #3 Posted by Wayne Brown on 7 Oct 2004, 3:21 p.m., in response to message #1 by Chan Tran If such software existed it wouldn't do you any good; the range of the IR transmitter on the 49G+ has been crippled so that you'd have to hold it very close to the TV for it to work.

Re: Anyone has remote control software for the 49G+? Message #4 Posted by Chan Tran on 7 Oct 2004, 3:48 p.m., in response to message #3 by Wayne Brown I don't know about the 49+ but the 48GX has very short range IR too when they're communication with each other but when using as remote control it works at distance better than 10ft.

Re: Anyone has remote control software for the 49G+? Message #5 Posted by Wayne Brown on 7 Oct 2004, 4:10 p.m., in response to message #4 by Chan Tran Yes, the receiver of the 48 series is limited to short-range use only, but the transmiter has a much greater range, so it makes a good remote control. But the range of the transmitter of the 49G+ has also been reduced. Here's a link to an article from Jean-Yves Avenard in which he says, among other things: Quote: Also, the IR LED is seriously crippled to no more than 5cm, so unlike the HP48 where only the receive LED was crippled having a remote with such a short range woulb be useless IMO anyway.

How about for the 48? Message #6 Posted by db(martinez,california) on 7 Oct 2004, 8:30 p.m., in response to message #5 by Wayne Brown Can someone tell me how to find the software for a 48 remote?

Re: How about for the 48? Message #7 Posted by James M. Prange on 7 Oct 2004, 9:17 p.m., in response to message #6 by db(martinez,california) Just a wild guess, but you might try: http://www.hpcalc.org/search.php?query=remote&hp48=1 Regards, James

Re: How about for the 48? Message #8 Posted by Chan Tran on 11 Oct 2004, 8:57 a.m., in response to message #6 by db(martinez,california) I used this software on my 48GX and it works great. It does not work as well on the 48SX though. http://www.hpcalc.org/hp48/utils/comms/rem34bg.zip

Re: Anyone has remote control software for the 49G+? Message #9 Posted by James M. Prange on 7 Oct 2004, 9:53 p.m., in response to message #5 by Wayne Brown I'm surprised that JYA wrote that, and that I apparently didn't notice at the time. I expect that he meant "SIR" instead of "RedEye". The 49g+ does have the capability to send in "RedEye" mode to the 82240A and 82240B printers, but, experimentally, the range is about 5 cm, compared to 1-2 m from a 48 series. As far as I've been able to determine, the "Serial IR" used on the 48 series isn't available on the 49g+. The 49g+'s "IrDA" is seriously (and intentionally) crippled to 10 cm on the 49g+ to accomodate the "educational community". Cyrille wrote that both the transmitter power and the receiver sensitivity are low. Experimentally, 10 cm does indeed seem to be about the maximum range that I can get between my 49g+ and IrDA/RS-232 converter. It might be possible, using ARM programming, to directly control the IR transmitter and detect light pulses at the receiver in a "raw" state, but I expect that the extremely short range would make it rather impractical to use it as a remote control. Of course, it might be possible to modify the hardware to increase the range to the 1 m that's normal for an IrDA device. Another idea is to build an "IR amplifier" that would be slipped onto the 49g+. Regards, James

Re: Anyone has remote control software for the 49G+? Message #10 Posted by Dimitri Turbiner on 16 Oct 2004, 10:43 p.m., in response to message #9 by James M. Prange "Another idea is to build an "IR amplifier" that would be slipped onto the 49g+." Or to unsolder the transmitter resistor used to reduce current (I think there is one). I was actually looking at some photos of the inside of the hp and saw a bunch of SMT resistors and condensators around the IR and usb plug. Have a nice time everybody! Dimitri

Re: Anyone has remote control software for the 49G+? Message #11 Posted by James M. Prange on 17 Oct 2004, 2:36 a.m., in response to message #10 by Dimitri Turbiner Actually, short out whatever limits the power, presumably a resistor. Or, more likely, replace it whith a lower resistance. But which one? And of course it would void any remaining warranty. Edited: 17 Oct 2004, 2:37 a.m.

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