OV7670 Camera module to PC with Arduino (SIMPLIFIED!)
This tutorial is about the model without the fiber chip. This video is a remake of my old ob7670 tutorial. Now you can get the full vj color image over the usb cable or if you are ready to sacrifice the resolution, then you get almost a video stream. The first half of my old tutorial was about compiling the java program. You dont have to do that anymore. I have created the ardo image capture plugin for arduino ide that you can open from the tools menu Music first open, my article about the ob7670 project. The link is in the description box below then download and extract the ardo image capture. Zip file Music create a new folder called tools. Next to the arduino libraries folder Music then move the extracted r2 image capture folder to the arduino tools. Folder make sure that you copy the arduino image capture folder, that directly contains the script files and a tool folder. For example, you might have these nested folders after extracting the zip file. In that case, you must copy the inner art image capture folder without any version numbers in the name. After running the arduino ide, you should see the arduo image capture option under the tools menu. First, you need an arduino uno or a nano. It is preferable to have an arduino clone over a chainian arduino, because for some reason you cant use the one and two megabit portraits with an original arduino Music. The higher baud rates work fine, with a clone that uses the chinese ch340 chip instead of an ftdi serial chip.
But if you only have a genuine arduino, you can still do it, but you are limited to half a megabit baud rate. Unfortunately, this means that the maximum resolution you will get is a quarter vga 320 by 240.. You need an ob7670 camera module without the fifo chip, two 10k resistors for the i squared c connection and one pair of 1k and 680 ohm resistors for the clocks, voltage, divider and finally, a breadboard and a bunch of jumper wires. The very first step is to download the live ob7670 project from github. The link is in the description box below after extracting the zip file copy, the two library folders from source sleep to the arduino libraries folder Music. Now open live ov7670 and switch to the setup.h file by default. The code is configured to work with a tiny screen to switch it to serial communication change. The example1, to example, 3. select the example uart cpp tab from the top. Here you can see a list of pre configured resolutions with various communication speeds. The default value is 320 by 240 at half a megabit pod rate. This works on both the genuine arduino and the clone upload. The code to arduino now comes the first checkpoint. Open tools are to image capture, ensure that the correct comport is selected and the baud rate is 500 thousand. Then click on listen, Music. You should see a solid red rectangle. This means that the communication is working, but the live ob7670 code did not detect the camera module lets start by creating a voltage divider for the camera input, clock arduino will generate the clock pulses and since it is a 5 volt signal, we need to get it Down to about 3.
3 volts for the camera module, the 1k resistor will connect to the Music ground, the 680 ohm resistor to the arduino d3 pin Music and the output of the voltage divider to the cameras. Xclock input Music now im going to connect the i squared c wires: 3.3 volt pull up resistors, Music, arduino, pins a4 and a5 to the pull up, resistors Music, a wire from a4 to siod and finally, a wire from a5 to sioc. The vsync wire can be connected directly from arduino pin d2 to the cameras, vsync output, Music, the same thing with the pixelbook arduino pin d12 to cameras, p clock output to power up the camera. We also need to connect the 3.3 volt power output from arduino to the cameras, 3.3 volt input and ground to the ground Music. To make sure that the camera will run. We need to pull the cameras reset, pin to 3.3 volts and power town bin to the ground. Now comes the second checkpoint, open order, image, capture and click on. Listen. You should see a solid, clear rectangle. Then, within a couple of seconds, you should see vsync in the message box and then the image should go black or maybe some random noise, since all the pixel wires are still floating. If the image is still red, recheck all the wiring. If the image is green and wheezing doesnt appear check the using wire if the picture stays green then check the pixel clock wire.
The final step is to connect all the pixel data wires, connect arduino, pins a0 to a3 to cameras d0 to d3 and arduino pins d4 to d7 to cameras d4 to d7 Music, open, rdo image capture again and click. Listen now. You should see a 320 by 240 image appear on the screen. If not check the pixel wires Music, you can change the uart mode parameter to experiment with different resolutions. You have to select the correct portrait that matches the selected mode. You can also check out my other tutorial connecting the ob7670 to a tiny lcd screen with that you can get the speed up to 10 frames per.
