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Cerberus

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About Cerberus

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    RC-Cam Visitor
  1. Marlin P. Jones & Associates ( http://www.mpja.com ) has a 75Mhz 6 Channel R/C Transmitter/Receiver on sale this month for $9.95 . This appears to be the same system as Mr. RC-Cam posted about in this thread. They also have a data sheet on building a decoder circuit for the servos. Link: VEX Transmitter & Receiver set
  2. I have found 4 ebay listings for a video headset with a/v input and thought someone might be interested. They don't have much info listed for them but have some pretty good pictures. (and they are rather inexpensive at the moment) http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...em=220353683091 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...em=380100771728 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...em=250365564805 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...em=250365564767 Disclaimer: Not my auction and I am not affiliated with them in any way. ~Cerberus
  3. Sound Card Oscope

    HERE is a DIY PC-based digital oscilloscope that can be built for under $100. The unit shown is rated at 100 mega-samples-per-second, but there are options to go to 200MS/S. It is RS-232 based but may be used on USB with an adapter. Software is included.
  4. MyVu Personal Media Viewer Glasses

    From member RetroPlayer at www.teamhackaday.com : "Here's how to connect any composite video source to these MyVu "fully loaded edition for Ipod 5th gen only" personal video viewer (that's a mouthful!) Simply pull up the Ipod_Tx line using a 100 ohm resistor between it and the 3.3v input. Make sure that REM_SENSE and IPOD_DF lines are left floating. Especially, Ipod_DF which will try to initiate communication with the ipod if it is pulled low. Also, you must have both audio and video present in order for the glasses to turn on and stay on. When video or audio is lost, the glasses will turn off. If you press the brightness button for a second or so and release it, the glasses will power back on. The pullup needs to be present already when you supply power. This tells the processor not to emulate an Ipod remote. That's all there is to it. Well, except for supplying 3.3v that is. I can't really take credit for this, because I cheated and called myvu. I was only looking for some hints, but I was transferred to the engineer that designed these, who was extremely helpful and interested in helping out. This model uses the same base hardware and firmware as the solo edition (not the solo plus) so this mod should work for the ipod version of that as well. The fully loaded just added the battery pack and ipod sleeve, I believe. Now, since these glasses actually use two cyberdisplays, I would love to see a stereo video mod. It may be possible to control which display is on and sync it with alternating video frames for each eye."
  5. MyVu Personal Media Viewer Glasses

    A few thoughts on this: The KCD-A210-BA display controller requires having configuration registers set and being initialized before being used. This is performed by the MSP430F2131 microcontroller through a serial data interface. The TW9910 video decoder also requires having configuration registers set and initialization before use. This is also performed by the MSP430F2131 microcontroller through a serial data interface. The MAX9723 headphone amp is connected to the MSP430F2131 through a serial data interface to control volume. The MSP430F2131 reads the pushbutton switches and sends the commands to the proper chip. The MSP430F2131 connects to the serial bus on the iPod. It may read data from the iPod or it may read & write. Apple Accessory Protocol From these observations it appears that the MSP430F2131 microcontroller is in charge and to wake up the MyVu, the MSP430F2131 must be woken up. One way that this may be done is have the MSP430F2131 listen to the iPod serial bus for chatter. If there is activity, the iPod is turned on and the MSP430F2131 could wake up. If this is the case, then you could connect a 4.7K resister from iPod TX to Vin & a 4.7K resister from iPod RX to Vin (as per W3FJW-Ron's idea) to wake up the unit. The MSP430F2131 could also be listening for a certain bit of data/command from the iPod to wake up. If that is the case, a PIC would need to be programmed to send the wake up command or the MSP430F2131 would need to be reprogrammed to bypass this. Pinout for the iPod cable inputs on the remote PCB (Cable comes in from left, pin 1 is at the top) 1. RFM - connected to AVGND 2. IPOD DF 3. Right Audio 4. AVGND 5. Left Audio 6. Unknown (looks like a video signal input) 7. VID 8. IPOD TX 9. IPOD RX 10. VIN (+3.3v) 11. GND (power ground) A note on "6. Unknown (look like a video signal input)" - This connects to the TW9910 video decoder through a capacitor. That would indicate that this is a video related analog input, possibly part of a S-video input?
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