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Topics - fcobcn

2
Project development, ideas, and suggestions / MMA7455L BOB free build
Got two PCBs from Ian some months ago, I was waiting to finnish building a reflow oven, and planned to use them as a test board.
Finally this weekend I got everything sorted out and did a first test. It wasn't a complete succes, one of the boards got shorted pins.
This is probably because I didn't use a stencil. In any case the bad board was later fixed using hot-air.

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I'm using a DIY version of rocket scream's reflow oven controller. http://http://www.rocketscream.com/shop/reflow-oven-controller-shield-arduino-compatible
NOTE: I have six PCBs left, and I won't be using them...
Here's how things look at the moment,

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The two populated boards were quickly tested using the bus pirate.

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Thanks DP!
3
Bus Pirate Support / WIP - Bus pirate v4c case
I have started working on a case for the BP v4c, this will be a sort of continuation of this thread:

viewtopic.php?f=4&t=2666

At the moment I have exported the eagle files to solidworks via IDF translation, the process is a bit tedious, but works really well.
The two most time consuming parts are preparing the eagle file with basic footprints and finding 3D representation of components.
Probably this can be simplified over time with creation of proper libraries.

Here are some pics with the current state of development:

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4
Project logs / PIC 18F2550 BOB free build
I worked on this great pcb a couple of weeks ago, finally I have time to post some pics.
I'm pretty sure this board won't stay on a desk drawer, It's a fantastic design, perfect for learning.
Right now it has diolan bootloader.
I'm only missing the 0603 10uf cap and the reverse polarity protection diode.

Thanks DP!

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5
Project logs / IRtoy free build
Yesterday I finished building my free IRtoy V2, previously I did the trough hole version, but I sent it by mistake to my home country (wich is far from here).
The smd crystal came from an old hard disk drive, the right angle pinheader is from a floppy disk drive.
I love recycling!

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Quick test, everything seem to be working ok!

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I couldn't get it to work with three leds in series, so for the moment I'm using only one.

Thanks Ian for providing us countless hours of free fun!
6
Project logs / TMP006 BOB free build
Just in time for today's blog post, I received and quickly built the TMP006 temp sensor board.
Had luck, it worked the first time, so my succes rate with BGA soldering is 100% at the moment. ; )

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Here's the finished pcb having a ultrasonic bath in alcohol, got a cleaner last week very cheap on ebay. No more sticky boards!

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Here's the board connected to my bus pirate

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Quick test, it's working!

Thanks Ian!
7
Bus Pirate Support / Cheap DIY Bus Pirate v.4 cable
I wasn't using my free build Bus Pirate v.4 until now, because of the lack of cables and pinheader.
While browsing a junk box the other day I found this:

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It came from an old compaq server I dismantled  years ago.
As the cables go out parallel to the connector, I decided to use an angled pinheader.
I didn't have any, so back to the junk box I found an old disk drive;

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I had to cut it, here's how it ended up looking:

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I personally prefer having the angled connector, it makes the Bus Pirate more stable over my desk.
I took a look at other desktop tools like the Saleae logic or USBee, they all have the pins coming parallel to the board.
This could be something to take into account for future DP designs.

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The probe hooks are from ebay, they are really cheap, I got one hundred of them for less than 20 dollars.
8
Project logs / Cygni free build
Today I finished populating my free Cygni PCB (only missing the smd pinheader)
Also managed to compile the complete tool chain on my mac machine.
At the moment I'm looking on how to burn the bootlader via UART.

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Big thanks to Brian and Ian!
9
Bus Pirate Support / Bus Pirate v4 free build
Finally I got all the components to finish my BPv4, everything went OK without issues at the first run.
I managed to bootstrap without soldering the icsp header, just holding the pickit2 cable with my hands while uploading.

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Quick question: Is this PCB considered the final v4 version?
I'm just checking before I start working on adapting my BP case design to this new PCB layout.

Thanks Ian!
10
Project logs / Arhi's soldering iron controller v2.0 build log
First, thanks to Arhi for sharing his fantastic work on the SIR, and also big thanks for sending me a PCB to build my own!
I haven't go as fast as I would like with this project, but as usual, life is full of distractions, some of them wich are nice :)
I'm not posting on the original forum thread because it's geting very long, and this version of the circuit it's already outdated.
Here you can see the current state of my build:

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I'm looking for a replacement for the MOC3031M, have found this:

-IL4116 http://www.vishay.com/docs/83628/il4116.pdf
-vo4156 http://www.vishay.com/docs/84797/vo4154.pdf
-vo4158  http://www.vishay.com/docs/84634/vo4157.pdf

I'm not sure wich one is more appropriate, also, for the triac I found this:

-MAC8S http://www.onsemi.com/pub_link/Collateral/MAC8S-D.PDF

Is it right? Help is highly appreciated!

This version of the PCB was designed to work with a 7805, wich must be changed, I have to look for a suitable solution.

And probably most important, I have to choose wich soldering iron to mate the circuit, recommendations are welcome!
11
Bus Pirate Support / cheap DIY Bus Pirate v2go case
I made this case a couple of years ago for my first bus pirate, v2go.
I took some pictures before putting it in a box, and sending it to the other side of the ocean.
As I'm probably moving next year, I have started to prepare my lab abroad.
If I remember correctly this was from the batch that didn't came with firmware, wich motivated me to build my first PIC programmer.
The case came with some samples, [s:]but I cannot remember wich IC manufacturer was...If anyone knows please drop a line.[/s:]
UPDATE: as arupbsk pointed out, the case came with some intersil samples
The light pipes are made from pieces of a CD case, they work great.

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12
Project logs / PICqueno DIP free build - "Quartz tower"
This one came out very quick, since I had most of the parts from my previous build.
It's a very nice board, have great plans for it.

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3 notes;
-Everything hand soldered.
-I'm using a REG113NA-3.3 from TI, it's a 400ma LDO, before finding it, I was using my bus pirate as a power supply to program the pic.

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-Need to find a smaller quartz! The one on the previous picture was defective.

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Thanks Ian!
13
Project logs / PICqueño free build
As usual with my builds, most of the components were free sourced or recycled.
Total cost were around 3€, for FTDI chip and USB socket.
Caps, resistors, LEDs, transistors, crystal and even pinheaders were all recycled (I really need to get a 0603 kit!!)


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A couple of components are missing, like the 5v regulator, power socket and diodes. But it's possible to work with USB power.
The bootloader was burnt using a DIY pickit2.

I couldn't upload sketches on a mac, but works perfectly on a vm XP system.

Thanks Ian!
14
Project logs / free SuperProbe built.
I have been using a DIY superprobe for some time, It's really handy, I always keep it around my desk.
So far I have used it to test servo motors, stepper motor drivers, uart connections, midi connections, etc.
So what could be better than a superprobe? Well, a smaller one!
Here are some pics of both versions,
I'm still missing a couple of components; the voltage regulator, a 20ohms resistor and two push buttons.

Thanks Ian!

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15
Bus Pirate Support / WIP - Bus Pirate milled case
I have been working over the week on this project.
It's has taken a lot of time, mainly because I had to solve a lot of problems:
-How to mill plastic; spindle speed, feed speed and cutting tool.
-How to import the PCB design into a 3D CAD package in order to produce an accurate model.
-How to generate the G-Code to use in EMC2.
-And last, but not least, how to make it a good looking design.

Here are some pictures of the current version, it still need a couple of refinements, but it's on the last iterations.
Currently I'm designing an engraving for the top and bottom, with pin name labels and a table with the pinout for the different modes.
Besides that I'm looking for a material, like some kind of resin, to add color dots on top of the case, to make it easy to find the correct probe in different modes.
Also, I'm looking for a rod of transparent plastic with a diameter of 2.5 mm to bring the light of the led out.

I have a question, maybe somebody can give me a clue. I would like to use small magnets, to hold both parts, but I'm not sure if this will interfere with the circuit. http://www.ebay.co.uk/itm/2x1mm-Neodymi ... _894wt_863
There will be a magnet on each corner of the case. Is it a bad idea?

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If everything goes as expected, I plan to make a couple of these to send for the free PCB drawer (Probably in about 3 weeks, I'm leaving for vacations now :)
After that, I will continue with another case design for other DP project (probably the superprobe), the only limitation I have is the size of the XY milling table, wich is something like 120x46.


Here's a test engrave for the bottom of the case.

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You may be asking why pink, it's because real hackers carry pink tools ;) http://berlinsides.org/node/40
(jokes off, I found a lot of discarded material around the corner of my house)

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