QUOTE (Meccano @ 12 Nov 2013, 10:48)
<{POST_SNAPBACK}>By the way, I could probably use your setup with my current software and it should worl fine. Do you have pit entrance and exit implemented (so I can run the virtual fuel option...) ? if not, is it something likely to happen ?
The mbed has 18 detection inputs so you could use some of those pit in/out if you wanted. The mbed just knows it has seen a detection at lane N at time T and that is what it tells the host PC. It is up to the RMS on the host PC to decide what to make of that information. I am planning on working on is improving the configuration of this as I want to make it easier to set up sector timing. So the PC will be told the mbed has seen a detection at location L, lane N at time T. This should also allow it to work better with digital systems where one sensor can see any one of the different car IDs (which are equivalent to lane IDs in analogue).
QUOTE (Si. @ 21 Nov 2013, 21:32)
<{POST_SNAPBACK}>Wierd OS's & hardware, that NASA might use; ain't practical for slot-car timing IMO.
I agree. One of the biggest challenges with the mbed was getting it to work reliably in the presence of all the EM noise from the cars. I suspect this problem would be even harder for the R-Pi (although it may not be).
QUOTE (Meccano @ 22 Nov 2013, 09:59)
<{POST_SNAPBACK}>Considering that the mBed board is doing the timing, the events could be queued or not and still have accurate timing (does this make sense ? Sorry, English is not my mother tongue...).
Si, if you're saying that the Pi is good for our needs (what I believe), I'm all for it ! And, on the other side of the mbed, we could have (if I understood well) the trigger set we want (IR, Hall effect, Reed, Photocells,...).
I'll look into Python to see what it's like.
Bernard
P.S : Al, if you can post what you have worked on, maybe we can help.
I have schematics on things I did (Reed switches to Parallel port on a laptop with DOS software.... I even designed a PCB to simulate a stop on a photocell with two Reed switches per lane for Pit entry and exit....) and it coule easily be modified if needed.
The mbed does indeed queue all events for sending to the host so they are always accurately timed.
It can also be configured to detect on inputs going low or high so it is suitable for use with a variety of different detectors with appropriate front end circuitry.
I have circuits working nicely for photo diodes, hall effect sensors, and the SSD digital system.
I think if you are serious about doing something on a Rasberry Pi, you should probably start a new thread for that.
).
