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Iriver HXX0: remote control

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brenzi:
Even if the project is old, this here might be interesting:

http://web.tiscali.it/minidisc/

That guy is working with a PIC16F84 and a digital potentiometer. If there's a small controller with integrated DAC somewhere, one could do it with less components. (which brings me back to the question: what controller are you using, bluebrother? ;-)
I guess it doesn't matter if we use a digital potentiometer or a DAC.

Actually, for the low accuracy needed it could even be enough to let the controller output a PWM signal to a RC-lowpass to get an analog signal.

bluebrother:
Sorry I didn't answer earlier, but I'm quite busy these days -- left at 6 in the morning today for an exibition and just came back (almost midnight here :o ).


--- Quote from: brenzi on February 14, 2007, 05:47:58 PM ---Actually, for the low accuracy needed it could even be enough to let the controller output a PWM signal to a RC-lowpass to get an analog signal.
--- End quote ---

I used an ATtiny2313 (mostly because I had one around from another project and because I have a hardware debugger for it -- and I don't like PICs) and simple PWM generation. I used its 16 bits timer so the resolution should be way enough.

As I'm like sleeping with eyes open atm I will post more details at some point later. Maybe I get around looking into it again over the weekend. Please don't hold your breath too much, I definitely will publish my results once its finished but uni is quite greedy regarding my time at the moment.

harpster:
Any update on success making an unwired remote control for the H1xx? The new Olympus LS-10 (not yet released) is touting that it has a remote control that allows you to start recording from a distance. Maybe one of you could sell your design for the H1xx and make a few bucks. It would be great for those in a band who want to start the recording from stage (like me!).

bluebrother:
Well, it's still a project of mine to complete it. Unfortunately interfacing turned out to be harder than I thought first. My try with PWM and a low pass produced jumping values due to the time the ADC requires. I tried using an R2R network but the output current wasn't enough for the ADC. That's the point where I stopped working as I changed location for a new job.

Perhaps I'll start looking into it again at some point (I haven't given up!) but the current status isn't working -- and my test hardware is somewhere out of my direct reach.

Tirithen:
Hello, I'm trying to make a remote for my H320 as well. I would like to use the resistance values on:
http://www.rockbox.org/twiki/bin/view/Main/IriverHardwareComponents#Remote_Control

Then experiment with a pic16f84 or similar to control it via ir or just cable and buttons since I have not got a remote at all.

The thing I wonder is how to make the simplest experiment by connecting a resistor with a value of 470 ohm to RMC connector to invoke the + button . Should I simply connect the resistor from the RMC to GND or do I need to connect it in some other way? do I need to use some other resistor to tell my H320 that it has a remote connected?

Or am I doing this in a totally wrong way?

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