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The output jack is not directly connected to an Arduino pin. It is connected to the digital to analog converter (DAC) chip.
No, TVout is written in AVR assembly.
Hmm, there must be a connectivity problem for the SRAM chips or the SPI select pins for the chips. I have never had this problem before.
Can you send good pictures of front and back of board to support [at] nootropicdesign.com? I’ll take a look.
Debugging is difficult because the code runs really fast. Did you add debugging inside the ISR function? That won’t work. You can try reducing the sample rate to see if that helps. That will give non-ISR code more time to run.
It would require a total rewrite because the video generation library (TVout) is written in AVR assembly.
I would like to design a new board (not a shield) from the ground up using a faster microcontroller but I just don’t have time. It’s a ton of work to develop a new product. Maybe someday.
The Lumazoid code is not going to work on an 8MHz microcontroller. A .hex file compiled for ATmega328 cannot be loaded onto an 8MHz Nano. If you want to use the source code, you will need to compile it for the target, but 8MHz is not fast enough to perform the audio analysis.
Why don’t you just buy the product from me? I did the hard part for you already.
xtal is 5mm x 3.2mm
Yes, it is a 16MHz crystal. The Lumazoid is essentially an Arduino Uno.
No, you could not use an ATtiny88. The Lumazoid requires a lot of memory.
Yes, that is an ISP connector so I can program the bootloader onto the ATmega328. When I get manufactured boards from the factory, they have no bootloader. Once the ATmega328 has a bootloader, it can be programmed with Arduino over the serial connection.
So, are you trying to replicate this product?
You can install the library by just dropping the TVout folder in your Arduino libraries folder. The library.properties file is not required by Arduino to use a library. Make sure you do not have the original TVout library installed there. Your error indicates it is finding the original TVout.
So, in Arduino/libraries:
TVout ├── TVout.cpp ├── TVout.h ├── TVoutPrint.cpp ├── examples │ ├── ClosedCaptions │ ├── DemoNTSC │ ├── DemoPAL │ ├── EdgeDetection │ ├── ExtractCaptionWords │ ├── NTSCserialTerm │ ├── ObjectTracking │ ├── OverlayDemo │ ├── TVBlaster │ ├── VideoFrameCapture │ └── VideoMIDI ├── keywords.txt ├── spec │ ├── asm_macros.h │ ├── hardware_setup.h │ └── video_properties.h ├── version\ history.txt ├── video_gen.cpp └── video_gen.h
(sorry, this library is over 10 years old, long before the newer specs)
- This reply was modified 9 months ago by Michael.
Nice, thanks for contributing that!
Also, see this:
Others have had the same issue and solved it by reducing the resistance of the 330 by adding another parallel path with another resistor.
I think that this is because your VCR is outputing a voltage that is higher than it should be, so the 1V signal from the Video Experimenter is not high enough to be fully opaque. Try adding a resistor in parallel with the 330 ohm resistor or 1K resistor. For example, if you run another 330 ohm resistor in parallel with it, the effective resistance is 330/2 ohms. I think this will raise the voltage of the output signal and make the “white” more opaque. Try experimenting with different values of resistors in parallel with the 330 and or 1K resistors to reduce that resistance to the output. You won’t break anything and I think you will find a way to make the white more opaque relative to the underylying video signal.
It’s likely that the voltage regulator got fried but maybe not. It’s very likely that the microcontroller got fried. Hard to test the microcontroller. Good news is that it can be replaced because it’s in a socket.
Are you in the U.S.?
Sorry, I haven’t published the schematics or board design because the Chinese have copied my products in the past.
Burning electronics smell always means the same thing: burning electronics. If you hooked up power wrong, it’s fried. The music flows through because input is directly connected to output.