PLL recommendations?

Started by William Meyer in comp.arch.embedded15 years ago 11 replies

I need a good PLL, and the frequency I need to generate is well beyond the range of any 4046 type device. In particular, I have a need...

I need a good PLL, and the frequency I need to generate is well beyond the range of any 4046 type device. In particular, I have a need for almost 80MHz. Any recommendations? I'm looking for inexpensive, small parts count, and CMOS. -- Bill Posted with XanaNews Version 1.16.1.1


What's wrong?

Started by Anonymous in comp.arch.embedded15 years ago 5 replies

Hi all, I'm really losing my mind now, been fighting with this for 8 days now, I give up. I hope you can tell me what's wrong in my setup....

Hi all, I'm really losing my mind now, been fighting with this for 8 days now, I give up. I hope you can tell me what's wrong in my setup. :( I self made a PIC18F8720 development board, and it seems to work, because I can program the chip with no problems. I'm using 100 nF SMD capacitors near every Vdd (including AVdd), and an integrated clock oscillator. It's a 24 MHz CMOS part by Epso...


Development boards for audio/video product.

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

Any good development boards for putting the input of CMOS ( audiio/ video ) over ethernet link? Thanks for suggestions and pointors;) I'm happy...

Any good development boards for putting the input of CMOS ( audiio/ video ) over ethernet link? Thanks for suggestions and pointors;) I'm happy with average frame rate as far as things are cost effective. ali


Ethernet based programable sensors

Started by Anonymous in comp.arch.embedded15 years ago 2 replies

Does anybody know of a cmos based camer that has an intergrated microcontroler which can be programed to process images, background subtraction...

Does anybody know of a cmos based camer that has an intergrated microcontroler which can be programed to process images, background subtraction - point tracking and then stream custom data across tcp/ip? It just seems so wrong to be using usb cameras, I'm streaming 4 into my computer at the moment and the bandwidth on my usb2 is already critical - what i want is a cloud of customisable visi...


Low resolution imagegrapping

Started by Cellist in comp.arch.embedded10 years ago 6 replies

Hi all. I am doing a project on building a radiocontrolled model submarine. I have been thinking about incorperating a small lowresolution...

Hi all. I am doing a project on building a radiocontrolled model submarine. I have been thinking about incorperating a small lowresolution camera in the sub, then I found this forum and started reading on CMOS image sensors. The main problem is the transmitting up to the surface. I have developed a theory on using some ultrasonic transducers to get a data transfer speed at 320 kilo bit per ...


DSLR Image Sensors

Started by woko in comp.arch.embedded11 years ago 5 replies

Hi everyone, the great DSLR camera manufacturers like CANON or Sony equip their camera now with CMOS sensors. I could find out, that they...

Hi everyone, the great DSLR camera manufacturers like CANON or Sony equip their camera now with CMOS sensors. I could find out, that they develop their sensors on their own. Does anybody know do they also sell their sensors for custom designs? Thanks in advance, Wolfgang Kopp


What uses most power in Ebook-reader aps.?

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

I've had this pocket calculator to 10 to 20 years: marked "2 penlight..for over 22,00 hours of continuous use, -- auto shut off". It's use...

I've had this pocket calculator to 10 to 20 years: marked "2 penlight..for over 22,00 hours of continuous use, -- auto shut off". It's use for a few minutes, about 10 times a year. I replace the AAs approx after 2 years. I think it's got a [originally Fairchild of '70] F8 u-proc. inside. Q. It must be [partially] live all the time, to read the on-key, or can a single CMOS gate acheiv...


Image Sensor Interface

Started by pes in comp.arch.embedded11 years ago 3 replies

Hi, I' m looking for solutions to interface a 1.3Mpixels CMOS image sensor, I' ve thought to use a FPGA but it seems to be a little...

Hi, I' m looking for solutions to interface a 1.3Mpixels CMOS image sensor, I' ve thought to use a FPGA but it seems to be a little expensive. What about the market? Is there dedicated circuits to realize the interface and stock the data? Is there processors with DMA transfert which allow to interface the sensor? Thanks for your help.


Help trouble shooting MAX232 interface

Started by Sal P. in comp.arch.embedded12 years ago 4 replies

I'm attempting to interface a CMOS camera module [C328-7640] to my PC via the RS232 com1 port to learn how to interface with the chip. The...

I'm attempting to interface a CMOS camera module [C328-7640] to my PC via the RS232 com1 port to learn how to interface with the chip. The modem cable is working ( I tested it by connecting the Tx & Rx pins (2& 3) then opened hyperterminal and when I type any letters they get written on the terminal ) I put both the schematic and how the breadboard is wired on my website to show what I d...


Intel D101GGC Motherboard

Started by shimul in comp.arch.embedded11 years ago

PROBLEM I have a Soltek SL-75MRN motherboard that won't boot. I just get a long beep which is repeated and nothing on the screen. I have...

PROBLEM I have a Soltek SL-75MRN motherboard that won't boot. I just get a long beep which is repeated and nothing on the screen. I have reset the cmos, but there is no change. I have tried to boot up from my Window XP cd but still just get the beep. find the solution here http://pc-solution4u.blogspot.com/search/label/Intel%20D101GGC%20Motherboard


Image processing using microcontroller

Started by anex in comp.arch.embedded9 years ago 6 replies

hi.. i want to develop an embedded system using a micro controller and a cmos sensor.. i have chosen atmega16 and c3088 sensor.. however I...

hi.. i want to develop an embedded system using a micro controller and a cmos sensor.. i have chosen atmega16 and c3088 sensor.. however I am certain that memory constraints will be a problem for storing the images..i am aware of avrcam and cmucam and realize that such a system is possible..however i cannot find a way around the memory problem..can someone please suggest some way to solve this pro...


cmos camera, low power consumption

Started by Sal P. in comp.arch.embedded12 years ago 12 replies

Hello all, I am helping a local wildlife conservation group research the the feasibility of a digital camera which can last for about 3 weeks...

Hello all, I am helping a local wildlife conservation group research the the feasibility of a digital camera which can last for about 3 weeks with out being recharged (they approached a few camera companies and were told that the number of cameras ordered would be too low for them to be interested). The camera will be located outdoors in a wooded area with no access to power, and the 3 ...


cmos image sensor to usb

Started by momaley79 in comp.arch.embedded12 years ago 1 reply

Hello, I'm working on a personal project where I'd like to basically make my own webcam from scratch. I am looking for a camera in the...

Hello, I'm working on a personal project where I'd like to basically make my own webcam from scratch. I am looking for a camera in the VGA/15fps range. The most important factor in my design is form factor. I'd like to make it as "pencil-like" as possible. For example, I basically want something like this: http://www.aurora-optical.com/modules/CM036U%20Preliminary%208-8-07.pdf from Aurora O...


Coolrunner 2 CPLD IO

Started by Dave the Lurker in comp.arch.embedded15 years ago 6 replies

Hi, Taking advantage of a good exchange rate to the USA at present, I bought a coolrunner 2 CPLD evaluation kit from xilinx. I didn't check...

Hi, Taking advantage of a good exchange rate to the USA at present, I bought a coolrunner 2 CPLD evaluation kit from xilinx. I didn't check the IO standards of the supplied device though. I've now found it uses LVTTL amongst other things. The top end voltages of LVTTL is about mid range on standard bipolar TTL and in the linear area of CMOS. Does anyone have any experience of in...


OV6620 image sensor headaches

Started by john orlando in comp.arch.embedded15 years ago 15 replies

Hello, I am currently working on a project using the Omnivision OV6620 CMOS color image sensor (the same one used by the CMUcam). I have...

Hello, I am currently working on a project using the Omnivision OV6620 CMOS color image sensor (the same one used by the CMUcam). I have the OV6620 interfaced to an Atmel AVR microcontroller, and I am able to extract images from the camera and display them on a PC (through a PC app I wrote...the images get sent up over the serial port). Anyway...my question has to do with the Bayer image ...


build camera using cmos3088

Started by ysugand in comp.arch.embedded11 years ago 2 replies

Hay, I have just purchase a cmos 3088 and planning to build my own camera from it. I am just wondering what are the others components that I need...

Hay, I have just purchase a cmos 3088 and planning to build my own camera from it. I am just wondering what are the others components that I need to purchase to build the camera. I also want to do some image processing so that the camera can take the x-y coordinates for a black object's centroid, therefore I need to use a micro controller, any body have a code for that? I am planning to use atme...


Mixing logic families design rules

Started by Dave Boland in comp.arch.embedded14 years ago 3 replies

I need to design a card that has a 3.3 volt processor on it, a couple of 5 volt CMOS parts, and interface to TTL. This is turning into a...

I need to design a card that has a 3.3 volt processor on it, a couple of 5 volt CMOS parts, and interface to TTL. This is turning into a headache, so I'd appreciate some advice from experienced system/logic designers. Let me start by telling you what I think I know, and you can correct me. The processor is called 5 volt tolerant, which seems to mean it will handle a 5.1 volt input w...


Video capture/compression

Started by Meindert Sprang in comp.arch.embedded12 years ago 8 replies

Can anyone point me to manufacturers of video capture/compression chips? I'm not looking for mainstream PCI bus solutions but something that can...

Can anyone point me to manufacturers of video capture/compression chips? I'm not looking for mainstream PCI bus solutions but something that can be controlled by a microcontroller and a frame buffer. A bit like what is on chip with the Omnivision CMOS camera chips and the OV528 compressor. But I need to be able to connect standard analog CCIR camera's Meindert


____SRAM_gets__cleared use CS2 to power

Started by werty in comp.arch.embedded12 years ago

SRAM has 2 ChipSel lines , modern CPU with battery backup has a std method of safeing SRAM , using this 2nd ChipSelect pin ... ...

SRAM has 2 ChipSel lines , modern CPU with battery backup has a std method of safeing SRAM , using this 2nd ChipSelect pin ... "CS2" -------- SRAM has 2 sizes , small is CMOS , 5 microamps stdby Big is DRAM , 70Microamps stdby but they call it PSRAM . ______________________________________________________- Thx for the info. But, Gel file comes into picture, onl...


OV7620 RGB demosaicing problem

Started by ksanthos in comp.arch.embedded12 years ago 4 replies

Hello, I'm working on an imaging system which uses C3188A digital cmos camera(contains OV7620 image sensor). It is controlled by a PIC18F452...

Hello, I'm working on an imaging system which uses C3188A digital cmos camera(contains OV7620 image sensor). It is controlled by a PIC18F452 and each frame I want to view is stored in a FIFO buffer, AL422B. I can store a frame and transfer it to my PC by RS232. However I have a problem with the images, they look gray scale although they should be RGB. I have configured OV7620 to transmit QVGA...