CMOS camera interfacing

Started by ampd in comp.arch.embedded6 years ago 16 replies

Hi, I've been wanting to start a project to build a small camera. I'm looking to take a cmos camera (most likely 1.3mp such as omnivision 9655)...

Hi, I've been wanting to start a project to build a small camera. I'm looking to take a cmos camera (most likely 1.3mp such as omnivision 9655) and take a still image and store on a sd card. Speed isn't really a concern, but I wasn't sure what the best way to deal with the amount of data being sent out by the cmos camera. I'd like to keep the cost and complexity as low as possible. Would...


PSRAM is SDRAM , but at .00007 amps !

Started by werty in comp.arch.embedded11 years ago 1 reply

The M 69 AW 024 2 megaByte DRAM is so low power , they did not want to call it DRAM , so they tagged it ...

The M 69 AW 024 2 megaByte DRAM is so low power , they did not want to call it DRAM , so they tagged it PSRAM All the transistor methods are pulling about same milliwatts/megahertz , so CMOS is same as DRAM . CMOS at 50Mhz gets hot ! So why not just use DRAM !! Besides , 2MegaBytes is impossible ,in CMOS at that price and density ... ...


CMOS camera to USB

Started by cerbero85 in comp.arch.embedded7 years ago 15 replies

Hi all. I'm making a project with a low-resolution camera and I want to transmit the captured frames over an USB channel. The camera is an...

Hi all. I'm making a project with a low-resolution camera and I want to transmit the captured frames over an USB channel. The camera is an Omnivision CMOS with 400x400pixel resolution(it uses a bayer pattern) and 10/8 bit Raw output. I saw the CMUcam project and if was possible i would make a similar project. I thought I'd use the following chips: Camera CMOS + FIFO buffer(Texas Instrumen...


Choice between CMOS 4099 or 74HC259

Started by MM in comp.arch.embedded12 years ago 10 replies

Is anything to be gained from substituting 74HC/HCT259 chips for CMOS 4099 ones? The 4099 chips shown in the circuit in question hook up to a...

Is anything to be gained from substituting 74HC/HCT259 chips for CMOS 4099 ones? The 4099 chips shown in the circuit in question hook up to a 16F84 PIC and to a 74LS138. MM


CMOS sensor where to buy

Started by USB wcam in comp.arch.embedded8 years ago 1 reply

Where can I can find a CMOS sensor (ST, Omnivision, etc)with the lens, somebody sales the sensor with the lens ? ...

Where can I can find a CMOS sensor (ST, Omnivision, etc)with the lens, somebody sales the sensor with the lens ? --------------------------------------- This message was sent using the comp.arch.embedded web interface on http://www.EmbeddedRelated.com


cmos camera with a pic

Started by peres in comp.arch.embedded11 years ago 13 replies

Hi, i need only to store a picture when an event happens, i want to do it with a pic16f876A, i dont need to do any kind of image processing...

Hi, i need only to store a picture when an event happens, i want to do it with a pic16f876A, i dont need to do any kind of image processing i think, just take a picture and store it into a flash, so my question is what cmos camera do you recomend for this? thank you in advance


CMOS Camera still shots - SD storage - Design recommendations

Started by fvnktion in comp.arch.embedded7 years ago 11 replies

Hi there, I am looking into doing a new design which requires taking periodic still shot pictures from a CMOS camera and storing them into SD...

Hi there, I am looking into doing a new design which requires taking periodic still shot pictures from a CMOS camera and storing them into SD memory. I am looking into the feasiblity of this using a Microcontroller to do this. I have used mainly PIC 16 bit products in the past. There may be a better option available out there. I would like to get some feedback from some you experienced design...


CMOS design rules

Started by Mike Turco in comp.arch.embedded13 years ago 16 replies

If I want to tie CMOS (74HCXX) pins hi or low, do I need to use resistors? If I need resistors, can I connect pins together and then tie them...

If I want to tie CMOS (74HCXX) pins hi or low, do I need to use resistors? If I need resistors, can I connect pins together and then tie them hi/lo through a single resistor?


Configuring sccb for OV9650 cmos camera

Started by maximili in comp.arch.embedded8 years ago 3 replies

Hi all. I have just purchased the omnivision 9650 cmos camera for my project of image processing and i wish to interface the camera with...

Hi all. I have just purchased the omnivision 9650 cmos camera for my project of image processing and i wish to interface the camera with the Altera DE2 FPGA board. For this I need to write the configuration in verilog code program but I do not have a clue about how to write it. Can anyone here provide any guidance? Thanks a lot. --------------------------------------- This messa...


Depleted CMOS device with integral battery repair

Started by msg in comp.arch.embedded10 years ago 3 replies

Greetings: A recent thread in this N.G. addressed the issue of dead batteries in CMOS Clock/Calendar/RAM devices such as the Dallas DS1287,...

Greetings: A recent thread in this N.G. addressed the issue of dead batteries in CMOS Clock/Calendar/RAM devices such as the Dallas DS1287, DS12887, Twinhead TH6887A, and others; some of these devices are no longer available as new stock and old stock is often also unusable and for many there are no equivalent replacements. Surgery to permit attaching external backup power sources is poss...


Floating buses (hardware problem)

Started by Geoffrey in comp.arch.embedded12 years ago 7 replies

Hi Everyone In the case of a simple configuration comprising a CMOS microprocessor plus one external CMOS SRAM, it may well happen that the...

Hi Everyone In the case of a simple configuration comprising a CMOS microprocessor plus one external CMOS SRAM, it may well happen that the processor's external bus interface becomes inactive for long periods (for instance, when the uP is accessing code and data in internal memory). In this case, the bus is high impedance, and could, in principle, float to a voltage mid-way between the p...


Battery-backed RAM

Started by Geoffrey in comp.arch.embedded12 years ago 2 replies

Hi Everyone I'm designing a system which uses low power SRAM powered by battery as a backup device. The data sheet states that all I/Os mus be...

Hi Everyone I'm designing a system which uses low power SRAM powered by battery as a backup device. The data sheet states that all I/Os mus be kept within 0.2V of either Vcc or GND for the standby current to be guaranteed. This is no surprise, one CMOS device must be held firmly in the off state. The I/Os will be connected to a powered down CMOS buffer while in standby mode, and my ...


C3088 CMOS Imaging Sensor Questions

Started by Anonymous in comp.arch.embedded11 years ago 11 replies

Hi all, I'm looking to purchase the C3088 CMOS imaging sensor. I plan to interface it with a PIC microcontroller in order to do some...

Hi all, I'm looking to purchase the C3088 CMOS imaging sensor. I plan to interface it with a PIC microcontroller in order to do some image processing on-board my robot. I was wondering if someone could take a moment and answer a couple of questions for me. (1) Would this be reasonable code for capturing a frame of data from the C3088 row=0; col=0; // generate interrupt if VSYNC ...


convert cmos to lvds

Started by SHAI in comp.arch.embedded11 years ago

Hi i want to use the ads8422 adc but his outputs are 16 parallel cmos type i can't find a solution to convert it by serdes to lvds line another...

Hi i want to use the ads8422 adc but his outputs are 16 parallel cmos type i can't find a solution to convert it by serdes to lvds line another problem is on the reciever side ...i want to use a lvds reciever to convert it from lvds to a single spi line can anyone recommend any devices for this application or any other tips Thanks Shai


CCD / CMOS affordable camera kits???

Started by vitoal18t in comp.arch.embedded12 years ago 6 replies

I tried searching the web, but failed to find what I need, that's wh I am posting. I am trying to get up to speed in Digital Image Processing...

I tried searching the web, but failed to find what I need, that's wh I am posting. I am trying to get up to speed in Digital Image Processing based o FPGA design I am having hard time finding a camera kit (cmos or ccd) with VG resolution. I know Atmel, Omnivision, Kodak, provide sensors, but don't want to bother with board layout at this point. I simply wan to read raw image data from th...


CMOS camera chip + microcontroller = Home made camera

Started by Hugo Muccho in comp.arch.embedded12 years ago 8 replies

I am studying digital electronics and I need to build a low-resolution camera unit which can transmit the captured frame over an RS232 comm...

I am studying digital electronics and I need to build a low-resolution camera unit which can transmit the captured frame over an RS232 comm channel. I will use a CMOS camera chip and a low cost microcontroller (ATMega or PIC) because of limited student budget. Can you tell me if you can see any design tricks/pitfall on this project that I need to be aware of? Where can I order a low...


cmos fet driver

Started by Hul Tytus in comp.arch.embedded10 years ago

comp.arch.embedded cmos fet driver The cd4041ub looks good for driving an fet with about 2500 pf at the input. In the test circuit, the...

comp.arch.embedded cmos fet driver The cd4041ub looks good for driving an fet with about 2500 pf at the input. In the test circuit, the 4041 is driven by an optical isolator's output with rise & fall times in the neighborhood of 5 micro sec's. In this setup, the 4041 noninverting output drives 2500 pf in about 1/4 of a microsecond, rising & falling - well within limits. However, th...


CMOS Image sensor & Two-wire serial interface

Started by Kcin in comp.arch.embedded7 years ago 9 replies

Hi, I tried to look for similar topics in the archive but no luck. I have a cmos image sensor, and it has a "two-wire serial interface" to...

Hi, I tried to look for similar topics in the archive but no luck. I have a cmos image sensor, and it has a "two-wire serial interface" to read/write its on-chip registers. I tried to treat it like a I2C protocol, and fed a 100KHz at SCL, and write an address byte at SDA, but cannot get the acknowledge bit. Is it about the values of pull-up resistors in SCL and SDA? Or the clocking frequ...


Looking for ARM with Ethernet MAC+ Keypad interface + CMOS interface....

Started by Y.Young. LEE in comp.arch.embedded10 years ago 4 replies

Hello all, I am looking for an ARM processor with integrated Ethernet MAC and keypad interface & CMOS interface. Appreciate any suggetsions.

Hello all, I am looking for an ARM processor with integrated Ethernet MAC and keypad interface & CMOS interface. Appreciate any suggetsions.


interfacing PS/2 voltage levels to CMOS

Started by Laszlo Cser in comp.arch.embedded14 years ago 16 replies

I would like to interface the inputs of a CMOS microcontroller with a PS/2 signal. What interface circuitry should I put in between the PS/2...

I would like to interface the inputs of a CMOS microcontroller with a PS/2 signal. What interface circuitry should I put in between the PS/2 signal and the microcontroller inputs? It should be able to accept the standard PS/2 input voltages. Supply Voltage is 5V dc. Standard PS/2 input voltages: High-Level Input Voltage: 5.0V - Pullup (minimum) Low-Level Input Voltage: 0.5V ...