18F8720 symbols and footprints for PROTEL or EAGLE PCB-CAD?

Started by Fredrik Krook in Piclist16 years ago 12 replies

Hi!   Does anyone have these??? I need to make a PCB and it has to bee ready to send to manufacture by next...

Hi!   Does anyone have these??? I need to make a PCB and it has to bee ready to send to manufacture by next week... :/


Non Linearity problem (OP-AMP)

Started by R Ramesh in Piclist17 years ago 5 replies

 Hi all,   My design is to  control the current and it to be stable.     Current Range is  0-40A . What I...

 Hi all,   My design is to  control the current and it to be stable.     Current Range is  0-40A . What I made is in my PCB , I made a wider portion of copper coating  ( like shunt )  for feed back   and at


Multi microcontroller system design

Started by jr goco in Piclist16 years ago 1 reply

hello!, I am designing a system that requires multiple MCUs. Can somebody give insights in design issues and suggestions?...

hello!, I am designing a system that requires multiple MCUs. Can somebody give insights in design issues and suggestions? Especially in pcb prototyping. thanks! jr goco


44 TQPF ZIF socket

Started by Eirik Karlsen in Piclist16 years ago 7 replies

Hi, my project is nearing completion, and I will be producing maybe a hundred PCB's. I'll be using the PIC18F442 in a 44 lead TQPF...

Hi, my project is nearing completion, and I will be producing maybe a hundred PCB's. I'll be using the PIC18F442 in a 44 lead TQPF (10x10mm square chip). The chip will have a bootloader, but to get the bootloader into the chip I'll need a ZIF socket. I've been looking all over for su


PCB direct toner transfer methode

Started by Vasile Surducan in Piclist16 years ago 17 replies

Hi list, I'm interested into a viable, direct toner transfer methode PCB producing. I would be glad if someone could point...

Hi list, I'm interested into a viable, direct toner transfer methode PCB producing. I would be glad if someone could point to any *tested* methode. I'm interesting mostly on homebrew, without using special transfer papers. Thank you in advance, Vasile


100vdc Mosfet H-Bridge w/Drivers

Started by mr0x1001001 in Piclist16 years ago 6 replies

Hi, Anyone have a reference design or pcb layout (Eagle pref.) for an 100vdc MOSFET H-Bridge w/drivers? I have ir2110 and...

Hi, Anyone have a reference design or pcb layout (Eagle pref.) for an 100vdc MOSFET H-Bridge w/drivers? I have ir2110 and 300vMOSFETS, but am open for others. Cheers


PCB house

Started by Eirik Karlsen in Piclist16 years ago 4 replies

Hi, have anyone of you had any experience (jobs) with Elprint, < http://www.elprint.no/ > or their MACAOS program < ...

Hi, have anyone of you had any experience (jobs) with Elprint, < http://www.elprint.no/ > or their MACAOS program < http://www.macaos.com/support/howto/ > ?? They're making quite ine


Power Circuit Problem

Started by Scott Lingerfelt in Piclist16 years ago 8 replies

Anyone, I just created a PCB which I have put the following components for my 5V power circuit. I do not get 5V out I am...

Anyone, I just created a PCB which I have put the following components for my 5V power circuit. I do not get 5V out I am getting around 4.2V. Any suggestions? I do not have anything connected but a ULN2803A driver. Should I upsize my 10uF cap? Do I need to load the circ


Simplest remote control using pic

Started by AMIT KAPOOR in Piclist15 years ago 3 replies

hi all Actually in my project i have PIC pcb board which controls motors for X-Y table.....i have to manually turn on one...

hi all Actually in my project i have PIC pcb board which controls motors for X-Y table.....i have to manually turn on one button in pic board to start the process.....what i want is remote control...simplest remote control which jst turn ON one pin of pic so that rest of motion c


Humidity Sensor

Started by Scott Lingerfelt in Piclist15 years ago 5 replies

Can anyone recommend a low cost Humidity sensor? I have been using the Sensirion Temp/Humidity but I am looking for a lower cost...

Can anyone recommend a low cost Humidity sensor? I have been using the Sensirion Temp/Humidity but I am looking for a lower cost product to mount on my PCB. I do not need 0-100% for this application! Preferably low power consumption for the circuit will be battery powered.


PIC18F452, chip interfering with DIP switch

Started by scubagreg7777777 in Piclist15 years ago 1 reply

Hi everyone, I'm pretty new to PICS, but will do my best to characterize my problem and provide as much pertinent info as...

Hi everyone, I'm pretty new to PICS, but will do my best to characterize my problem and provide as much pertinent info as possible. I perplexed as to what is going on with my PIC. I am using an 18f452 on a PICDEM 2 Plus board, and my own PCB that I milled.


humidity sensitive device

Started by Trikoupis Nikolaos in Piclist15 years ago 1 reply

Hello to everyone! I have read somewhere that humidity sensitive devices should have little moisture to burn/solder them on the...

Hello to everyone! I have read somewhere that humidity sensitive devices should have little moisture to burn/solder them on the pcb. I would like to know if there is a problem with humidity in general (working environment) or it is only not to emit water vapor and be destro


[EE] Shelf life of SMT paste solder

Started by Vic Fraenckel in Piclist15 years ago 1 reply

I would like to use SMT paste solder in syringe form for my modest PCB construction. I understand that this stuff has a shelf life...

I would like to use SMT paste solder in syringe form for my modest PCB construction. I understand that this stuff has a shelf life which can be prolonged by refrigeration. My local distributer can supply this to me from Kester, but I need to buy 5 tubes at a time. The price per tube is


Help Needed with PCB File Conversion

Started by enricoderfi in Piclist15 years ago 2 replies

Does anyone out there know how to convert the proprietary files that ExpressPCB genertes into standard Gerber files. I made a...

Does anyone out there know how to convert the proprietary files that ExpressPCB genertes into standard Gerber files. I made a very complex circuit board using the free software that ExpressPCB lets you use. They made a good board, but now I need to have quite a few made, a


Yahoo group for FreePCB open source PCB layout

Started by Anonymous in Piclist15 years ago 5 replies

I could not find much info on users of FreePCB, so I started a Yahoo group. FreePCB is an open source program for PCB layout....

I could not find much info on users of FreePCB, so I started a Yahoo group. FreePCB is an open source program for PCB layout. It works with a PADSPCB format netlist from any schematic package. http://groups.yahoo.com/gro


Free 3D CAD

Started by Dennis Crawley in Piclist15 years ago

Ken Boak (rat_ring list) wrote: List, This company are offering free mechanical CAD software but only if 100,000 ...

Ken Boak (rat_ring list) wrote: List, This company are offering free mechanical CAD software but only if 100,000 pre-register in the next month. Pass this message on to your friends and groups. A direct link to the regisration page is: www.x-cad.net I am not associated with this pro


PCB Assembly ?

Started by Eirik Karlsen in Piclist14 years ago 4 replies

Anyone who can recommend some online companies that will do short run/prototyping board manufacture + assembly with online or software...

Anyone who can recommend some online companies that will do short run/prototyping board manufacture + assembly with online or software price quoting ? Pad2Pad has stopped offering assembly services. -- ******************************************* VISIT MY HOME PAGE: < http://home.onlin


what is scoring and rebating ?

Started by Eirik Karlsen in Piclist14 years ago 5 replies

In PCB-Train's Technical Specifications, Mechanical section, they use the terms: No scoring No rebating What does this mean...what...

In PCB-Train's Technical Specifications, Mechanical section, they use the terms: No scoring No rebating What does this mean...what is scoring and rebating ? Their specs: < http://www.pcbtrain.co.uk/specs.htm > -- ******************************************* VI


O.T: Graphic Overlay?

Started by Eirik Karlsen in Piclist14 years ago 1 reply

Can anyone suggest a source for custom graphic overlays / front panel overlays, low cost, simple ordering, low qty. Seem to remember there was...

Can anyone suggest a source for custom graphic overlays / front panel overlays, low cost, simple ordering, low qty. Seem to remember there was a PCB house that offered this service... -- ******************************************* VISIT MY HOME PAGE: LAST UPDATED: 23/08/2003 ******************************************* Regards Eirik Karlsen


printer driver to output BMP

Started by Lez in Piclist13 years ago 1 reply

Is anyone using a (freeware) printer driver that outputs to a tiff or bmp file format? I have created a test pcb so I can protoype my design...

Is anyone using a (freeware) printer driver that outputs to a tiff or bmp file format? I have created a test pcb so I can protoype my design with the 18f2550, I want to send it as a bmp to my usual paint package so I can add text / clean a few corners etc, and then I can also save it as a jpg thumbnail for a page I have set up on the web to document my (slow) progress. -- Lez