(Revised) Simple PCB circuit-tracing technique (1 or 2 sided)

Started by msg in comp.arch.embedded13 years ago 2 replies

(reposted due to error in URL embedded in previous post -- can't cancel through our nntp host) Hello all, Although this is certainly...

(reposted due to error in URL embedded in previous post -- can't cancel through our nntp host) Hello all, Although this is certainly elementary, I thought I'd share it since it may help someone in a pinch; here is my simple technique to create a preliminary schematic from a populated 1 or 2 sided pcb: http://ipx1.cybertheque.org/homebrew/pcb-photog/ Regards, Michael Grigoni Cy...


PCB Express, Advanced Circuits, etc.

Started by Robert Scott in comp.arch.embedded15 years ago 11 replies
PCB

My favorite local circuit board maker has just gone out of business, so I am looking at the on-line out-of-town companies for boards...

My favorite local circuit board maker has just gone out of business, so I am looking at the on-line out-of-town companies for boards in prototype quanties. The two that I know of are PCB Express and Advanced Circuits. Does anyone have any comments, pro or con, on these two companies, or any suggestions on other PCB board vendors? -Robert Scott Ypsilanti, Michigan (Reply through this ...


Plastic Housing for USB Stick

Started by Heiner Karlin in comp.arch.embedded13 years ago 7 replies

Hello, We need to convert a custom interface to USB. This requires only a small electronic PCB. The most elegant solution would be to fit the...

Hello, We need to convert a custom interface to USB. This requires only a small electronic PCB. The most elegant solution would be to fit the PCB into one of the common USB stick housings. We found that Samtec makes USB connectors that can be soldered directly to PCB boards, as the ones used in USB sticks. What we still look for is a plastic housing, like the ones used for the commo...


Requesting help from EAGLE PCB users

Started by techie_alison in comp.arch.embedded13 years ago 25 replies

Hello, Please may I request help from an Eagle PCB designer users out there? What's confusing me is if my design is suitable for submission to...

Hello, Please may I request help from an Eagle PCB designer users out there? What's confusing me is if my design is suitable for submission to a PCB manfacturer in Gerber format. I see alot of manufacturers quoting 2 layer boards for 1 price, then 4 layer boards etc. etc. I'm guessing this refers to multi layered boards with additional tracks sandwiched inside the board? But using Eagle ...


USB 2.0 High speed 480Mbit device controller

Started by Anonymous in comp.arch.embedded13 years ago 2 replies

Hi, It seems I can't find anything else than CY7C68013? With the plenty of USB 2.0 High speed devices around novadays (like cameras, audio,...

Hi, It seems I can't find anything else than CY7C68013? With the plenty of USB 2.0 High speed devices around novadays (like cameras, audio, even flash disks) I do wonder what peoples do use? Google and Digikey don't show anything but Cypress. Best regards Tsvetan --- PCB prototypes for $26 at http://run.to/pcb (http://www.olimex.com/pcb) Development boards for ARM, AVR, PIC, MAXQ2000 ...


Question about PCB software (and making the boards at home)

Started by Gunnar in comp.arch.embedded14 years ago 26 replies

Hi all, I stumbled over an ad on www.circuitcellar.com about free PCB software (http://www.pcb123.com/). I would like to have some feedback...

Hi all, I stumbled over an ad on www.circuitcellar.com about free PCB software (http://www.pcb123.com/). I would like to have some feedback about this software from anyone using it, possibly comparing it to other PCB software out there. My needs are simple, I am planning to build small projects for personal use. On that note, how many of you are making your own boards at home? I used t...


engineering services needed - arm/pcb design

Started by sg in comp.arch.embedded13 years ago 10 replies

We are looking for engineering assistance developing a ARM SoC PCB for a commercial product. Ideal candidate will be US based, Chicago area a...

We are looking for engineering assistance developing a ARM SoC PCB for a commercial product. Ideal candidate will be US based, Chicago area a big plus. Demonstrated experience in pcb design with ARM SoC's, with some references of past work. Company Engineer who is looking to make some side money, or graduate EE student perhaps. /// Rough requirements are (more details will be provided ...


High quality Prototype PCB suppler?

Started by Anonymous in comp.arch.embedded14 years ago 4 replies
PCB

Short Version: Does anyone know of any inexpensive prototype board houses that can do 20 mil via (10 or 12mil hole) and 5 mil lines and spaces...

Short Version: Does anyone know of any inexpensive prototype board houses that can do 20 mil via (10 or 12mil hole) and 5 mil lines and spaces in 4 or 6 layers? Long Version: There are a lot of prototype PCB suppliers that produce 4 and 6 layer PCB's at realativly low cost. less than $400 a lot, some a lot less. None of these that I am aware of can do 20mil vias (10 ro 12 mil holes) ...


High speed PCB design tools

Started by Theo Markettos in comp.arch.embedded6 years ago 3 replies
PCB

Can anyone give recommendations for PCB programs for high speed digital design? By high speed I mean up to 10Gbps, though relatively simple...

Can anyone give recommendations for PCB programs for high speed digital design? By high speed I mean up to 10Gbps, though relatively simple boards. I've done 6Gbps in Eagle and it worked, but there was no way to verify the performance without fabbing the board and measuring it. It looks like we have some options of: 1. Cadence Allegro Design Authoring, Allegro PCB Designer, Allegro SI/P...


Looking for a switch

Started by Jim Stewart in comp.arch.embedded6 years ago 15 replies
PCB

Does anyone know of a pushbutton switch that can be surface mounted to the back side of a PCB with the actuator button protruding through a...

Does anyone know of a pushbutton switch that can be surface mounted to the back side of a PCB with the actuator button protruding through a hole in the PCB?


PCB grounding

Started by abrous in comp.arch.embedded8 years ago 1 reply

Hi to all, I am designing a PCB with a digital circuit based on a STM32F103 MCU with USB,LAN and RS232 ports. The power comes from an external...

Hi to all, I am designing a PCB with a digital circuit based on a STM32F103 MCU with USB,LAN and RS232 ports. The power comes from an external wall type 12V/2.5A switching type regulator. There are 3 grounds in my PCB : a digital ground (GND), a connector frame ground (FGND) which is connected to GND through a 3.9nF/1KV capacitor and the input ground (the common which comes from the external po...


23.8mm (15/16") spacer

Started by Ross Marchant in comp.arch.embedded14 years ago 4 replies
PCB

Does any one know a source for such a thing? I'm trying to space two pcb's an inch apart to fit on two rails in a 19inch rack: 25.4mm - 1.6mm...

Does any one know a source for such a thing? I'm trying to space two pcb's an inch apart to fit on two rails in a 19inch rack: 25.4mm - 1.6mm (pcb) = 23.8mm. Is there another way to do this? Ross


Program for PCB/Circuit Design

Started by BoysBoysBoys in comp.arch.embedded12 years ago 39 replies
PCB

What program do PCB makers use to layout all of the circuits before printing?

What program do PCB makers use to layout all of the circuits before printing?


What is the Best PCB Layout software ? (Money no object)

Started by Anton Erasmus in comp.arch.embedded6 years ago 52 replies

Hi, There have been quite a few discussion regarding cheap PCB/Schematic layout packages recently. What package(s) are considered the best...

Hi, There have been quite a few discussion regarding cheap PCB/Schematic layout packages recently. What package(s) are considered the best if money is no object ? What features does this/these package(s) have that are not available in the cheaper PCB/Schematic packages ? What packages are used to do the layout of these new generation ultra compact cell phones and other high volume consum...


Ground Fill and track impedance

Started by steve in comp.arch.embedded5 years ago 2 replies
PCB

I am designing a impedance controlled PCB and have ended up with 0.1mm tracks over ground plane spaced 0.1mm away. My PCB vendor has asked me to...

I am designing a impedance controlled PCB and have ended up with 0.1mm tracks over ground plane spaced 0.1mm away. My PCB vendor has asked me to ground fill on inner layers of the PCB to balance the copper. I am going to use 0.2mm copper clearance (0.017 thick copper foil). Is this liable to have much effect on my track impedance, my feeling is that it will reduce the impedance by a


Source for tock PCB shielding covers

Started by Jim Stewart in comp.arch.embedded12 years ago 7 replies
PCB

I'm looking for a small copper or tin "box" that fits over an area of a PCB to shield that area. I know there are plenty of shops that will...

I'm looking for a small copper or tin "box" that fits over an area of a PCB to shield that area. I know there are plenty of shops that will do a custom, but the shape is non critical and I can lay my board out around a standard part if they exist.


PCB: www.olimex.com

Started by Optimist in comp.arch.embedded15 years ago 34 replies

Hi guys, anybody used www.olimex.com to order PCB? Looks inexpensive at least for prototypes. Thanks. -- Dmitriy...

Hi guys, anybody used www.olimex.com to order PCB? Looks inexpensive at least for prototypes. Thanks. -- Dmitriy Fitisov ---------------------- http://www.radier.ca/pic/pictimer.php


Another PCB Fab Thread

Started by rickman in comp.arch.embedded3 years ago 24 replies
PCB

I was just in a conversation of "where do you get your PCBs fabbed?" But I can't find it, so I'm starting another. I like oshpark.com and...

I was just in a conversation of "where do you get your PCBs fabbed?" But I can't find it, so I'm starting another. I like oshpark.com and someone else mentioned www.pcb-pool.com/ which I don't recall having seen before. I know there are a couple of Chinese fabs with good prices and decent quality, but I don't recall who they are. -- Rick


Small volume microvia PCBs

Started by Tim in comp.arch.embedded7 years ago 6 replies
PCB

Laser drilled Microvia fab is widely available from volume PCB houses. But does anyone have a prototype recommendation for a microvia PCB?

Laser drilled Microvia fab is widely available from volume PCB houses. But does anyone have a prototype recommendation for a microvia PCB?


Eurocard question...

Started by Ross Marchant in comp.arch.embedded13 years ago 1 reply
PCB

On a typical 3U eurocard style module, does the front panel sit flush against the PCB or out a bit??? I'm trying to work out where to put the...

On a typical 3U eurocard style module, does the front panel sit flush against the PCB or out a bit??? I'm trying to work out where to put the front panel mounting holes. i.e. | | -> | |