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Messages - voidptr

62
General discussion / Re: wish me luck, I'll try to solder this small cap !
It wasn't bad ,  beside the fact I had to much coffee today !  :o)
I will really need a smaller iron tip tho, I currently only have a flat tip big like the cap  :o/

It surely another story with 0603 and worst 0402 !
No more soldering, I'm gonna clean that a bit and  ... time for a beer :O)
63
General discussion / wish me luck, I'll try to solder this small cap !
I will try to solder this 0805 cap on those pads, who seems to be made for 0603 ...
Board's caps are all 0402, I'm lucky they think a bit about the poor noob who
will solder things they made the pads bigger ...

So any hint before I burn my board ? :O)

64
Client software / Re: Jawi's Logic Sniffer client software - releases
@ Master Jawi  :-)

i took few minutes to play with the new beta2 .
i had many signals to measure ,time and duty cycle,  the new measurement on screen is really awesome !
i managed to lost the measurement side tab at one point tho, it just disappear i tried to find a scenario to
to make it disappear, but i was not able ...  but i was playing with all 3 tabs, and sectioning cursor positions
and resizing the master window...

tabs labels are not displaying correctly,  i used large scale font setting (120 dpi) 'cause i have a  1920x1200 :-)
but this is often a common bug the label is cut at the end ...

i didnt had the time to test other things, maybe this week i will have some time !

Keep the good works !  The next stable version will be awesome !
65
Project logs / Re: PIC32 dip on blade board :-)
Here some interesting comments from my noob previous thread, thank Marcus !

[quote author="markus_b"]Your board  and schematics look good, but a bit empty.

There two things you should do now:
1) DRC (Design Rule Check)
Look at 'Tools' -> 'DRC' and have a look at all the fancy stuff Eagle can check. These are the design rules Eagle can verify when you press the DRC button. They should agree with what your PCB supplier can do. For example if your PCB supplier can do 10mil tracks there should be '10mil' in the 'Wire' field under 'Clearance'.
This allows you to verify that your PCB design can be manufactured by your supplier. If you send him a PCB design that is in violation of these rules then you'll get a non-working PCB !!

2) CAM Processor
This is the tool which created the 'gerber' files from your PCB. Most PCB supplier will use the gerber files to create the PCB, not the Eagle data file (some PCB suppliers do). When entering that dialog you should load a 'Job' file, this is the definition for the gerber files Eagle should create. The creation of the gerber files can be specific to the PCB supplier too, some provide a job file to use with Eagle.
After creating these gerber files you should download and install a gerber viewer and have a look at these files, you'll then understand better how it works.[/quote]


of course DP Tutorials are a must to read and this one need to be read many time :o)
http://http://dangerousprototypes.com/docs/Get_your_PCBs_made
66
Project logs / PIC32 dip on blade board :-)
hey ! 

i moved my noob pcb project here :o)

i'm thinking to design an PIC32 DIP on a blade board,
i took a jump-start from Dangerous Prototype PIC32 board and make few changes,

i used a mini B usb connector in dip format,  i have a bunch of them here ...
i want to have a blade type board, with all the pins ordered.

it is me first board project so be gentle,
i'm currently learning eagle and all other stuff ...

here my first step :
[attachment=1]
[attachment=0]

i think i found the general placement ...
eagle routing seems to be kindof dumb sometime, i think i will have to route by hand ...

? question
i think i should not have any trace going under the xtal to have less interference
is it ok to have traces on the bottom side ?

all advices are welcome !
69
General discussion / Re: I just bought this, and you what did you buy ?
cool :)

i just received my little clock / square wave board adjustable from 1Khz to 33MHz
it is base on LTC1799  and for the price it is pretty good, real decent SW until 5MHz
SW rising edge is a bit cut at 10 MHz and it becomes rapidly a triangle wave until 30MHz ...
freq seems pretty stable and near no noise. 
they design is really simple and  it seems a real keeper to include in my future projects  :o)

 i was using my BusPirate as clock , but i need it in more useful place than just a clock :-)

http://http://www.ebay.ca/itm/130675415827?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
70
General discussion / Eagle parts for noob :-)
I thought it could be good to have a thread where we can share some basic Eagle stuff ...

there's DP tutorial here for ref
http://http://dangerousprototypes.com/docs/Dangerous_Prototypes_Tutorials#Cadsoft_Eagle

Noob starts here :o)

I included  .sch/.brd files of a mini usb through hole I'll need to used  ,  (both resistors are there only to have something to wire to as tests)
here the same item on ebay
http://http://www.ebay.ca/itm/170742316555?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

on the generated board do I have to do something more for the usb connector pads ?,
I means just placing the connector there will tell the pcb builder to make the pads and to drill holes for them ... right ?

and my mini usb connector has an ID pin, should i just let it unconnected ?

:-)
71
Project logs / Re: 8x16 led display
i saw few matrix designs with the pingpong balls and i like the idea ...
i might try  some days, i need a fun coffee table :o)
72
General discussion / Re: USB: ground shield and filter caps?
from USB v2 specs

"6.8 USB Grounding
The shield must be terminated to the connector plug for completed assemblies. The shield and chassis are
bonded together. The user selected grounding scheme for USB devices, and cables must be consistent with
accepted industry practices and regulatory agency standards for safety and EMI/ESD/RFI."

i guest it could means that the shield and the usb connector have traces to the mounting holes of the pcb
in case of many boards and power supply needs to be shield .

i guest it means no  link  between the connector and the pcb ground too in a way to keep cable noise not on the pcb.

am I right ?  :-)
73
Bus Pirate Development / Re: Reset button for v3.5 bus pirate?
[quote author="ian"]If you found the right push button with through-hole leads you could attach it to the ICSP header between GND and MCLR. When you push it it should ground the MCLR pin and reset the PIC.[/quote]

or make one that fit the header, a bit like my lowtech buttons with shorter wires,  i used them short and long wire versions everywhere  :o)
75
General discussion / Re: pic18f2550 with microchip USB demo
@ian
i just tried the free usb demo,
cool :-)  it works great on my Hacked Flash Destroyer :-)  (18F2550)
im pretty sure i can include an usb stack into it, i already using the same clocks setting,

http://dangerousprototypes.com/docs/Ope ... IC_18F2550

so my others timed stuffs won't have to be rethink to much :o)
now i need to find time to plunge  into usb specs ! :oP

thanks to all working to bring this stack to freeware :-)

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