Author Topic: Show your prototype board  (Read 2044 times)

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Offline 001

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Show your prototype board
« on: January 16, 2018, 08:29:22 am »
Show your prototype board (also custom-made bredboards and breakout boards)!



I interested  in hardware prototyping technics
« Last Edit: January 16, 2018, 08:32:42 am by 001 »
 

Offline rx8pilot

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Re: Show your prototype board
« Reply #1 on: January 16, 2018, 08:49:35 am »
Some prototypes need small parts requiring considerable effort in a PCB that looks like a real product....yet still a fragile prototype with all the bugs. Bodge wires, cut traces, etc....

Some recents....
Factory400 - the worlds smallest factory. http://www.youtube.com/c/Factory400
 
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Offline Yansi

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Re: Show your prototype board
« Reply #2 on: January 16, 2018, 09:11:14 am »
I'll add one myself to the collection.
« Last Edit: January 16, 2018, 09:14:12 am by Yansi »
 
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Offline 001

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Re: Show your prototype board
« Reply #3 on: January 16, 2018, 09:27:09 am »
awesome  :-+
 

Offline rx8pilot

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Re: Show your prototype board
« Reply #4 on: January 16, 2018, 10:04:38 am »
I'll add one myself to the collection.

Big POWER !!
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Offline Red Squirrel

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Re: Show your prototype board
« Reply #5 on: January 16, 2018, 11:41:46 am »
Here's one I did for a solar power pack for backup/camping.   Nothing super crazy, basically just an Atmel with arduino code to control an LCD display to show voltage and current.  The current is all messed up, I apparently am not good at doing the whole shunt + op amp thing and never manage to get a good reading. :P  Need to go back and see if I can tweak that some day.     I also did a serial interface.  If you console in with USB you get all sorts of command line options like to calibrate voltage, shut off threshold etc. There's a latching relay that will shut the whole system down at the set point to protect the battery.


 



Lid was added later down the line, painted after


There's a small compartment to put the cables and a few lights/accessories


60w Solar panel (2x 30w)


This is probably what I can consider my first serious electronics project.  Though I feel using the arduino code is cheating, I really want to learn how to use the "raw" code.  Just need to find a good book/resource that shows all the different commands like how to flip pins etc without using Arduino.   

I originally wanted to show the solar panel voltage/current too but the input of the charge controller is not floating so it messed up ground referencing.  I was not sure how to deal with that so had just not bothered.   I eventually want to completely redesign this and actually build my own charge controller and inverter and everything in one system.   I built it so it's modular, the two circuit boards are screwed on a piece of wood that acts as a "card" that slides in.  I eventually may look at making it use some kind of backplane so it's easy to take out and put back for tweaking.
« Last Edit: January 16, 2018, 11:47:00 am by Red Squirrel »
 
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Offline georges80

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Re: Show your prototype board
« Reply #6 on: January 16, 2018, 12:54:55 pm »
Running 35 - 60V input, 150W output (dual independent 75W LED driver channels).

Up and running this past weekend, just optimising some of the firmware dimming control now. Couple of 'blue wires' for authenticity :)

Thermal performance looks good at approx 95% efficiency.

cheers,
george.
 
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Offline blueskull

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Re: Show your prototype board
« Reply #7 on: January 16, 2018, 01:40:59 pm »
An 8W max optical output power 3-level (0, 1, 2) high speed laser transimtter, used to modulate both power and signal to a 65kV SiC super cascode gate driver.

Main chip is PSoC4, DC/DC module is LMZ series, the vertical flex board is TEC controller based on DrMOS, laser diode is a Chinese 105/250 multimode fiber module.



Here is the teardown of a similar laser module from the same manufacturer (FocusLight):

« Last Edit: January 16, 2018, 01:43:58 pm by blueskull »
SIGSEGV is inevitable if you try to talk more than you know. If I say gibberish, keep in mind that my license plate is SIGSEGV.
 
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Offline Z80

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Re: Show your prototype board
« Reply #8 on: January 16, 2018, 10:20:45 pm »
Wow, your prototypes are all so neat and tidy, I feel ashamed  :-DD

 
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Online rdl

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Re: Show your prototype board
« Reply #9 on: January 17, 2018, 09:09:12 am »
My dummy load which I built by following Dave's video. It didn't really work right at first but I finally got it fixed well enough for what I wanted it for. Maybe I'll try again someday.

 
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Offline BU508A

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Re: Show your prototype board
« Reply #10 on: January 17, 2018, 09:31:22 am »
Speaking of prototyping boards:

Which ones are you using?

I'm using the boards from Roth Electronic. They aren't the cheapest, but they have a great quality.
They also provide a lot of different prototyping boards.
http://www.roth-elektronik.com/en/produkte

The one I'm using most is the RE200-C3:


http://www.roth-elektronik.com/en/produkte/detail/artnr/RE200-C3/category/Prototyping+Boards+Dual+Inline?grid=2%2C54

You can get them for example at reichelt for EUR 4,40 incl. VAT plus shipping:
https://www.reichelt.de/Prototyping-Boards/RE-200-C3/3/index.html?ACTION=3&GROUPID=7787&ARTICLE=105475&SEARCH=RE200&START=0&OFFSET=100&

I'm not affiliated in any kind to the companies mentioned above.
« Last Edit: January 17, 2018, 09:39:01 am by BU508A »
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 
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Offline NiHaoMike

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Re: Show your prototype board
« Reply #11 on: January 17, 2018, 01:29:21 pm »
I have done a lot over the years, so I'll start with a fairly complex one - a hybrid air conditioner/water heater. Keep in mind that was before ESP8266 hence why there's an old OpenWRT development board being used for the network interface.
Cryptocurrency has taught me to love math and at the same time be baffled by it.

Cryptocurrency lesson 0: Altcoins and Bitcoin are not the same thing.
 
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Offline NiHaoMike

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Re: Show your prototype board
« Reply #12 on: January 17, 2018, 01:31:57 pm »
I suppose parts of the PC I'm still using as my main PC counts as well.
Cryptocurrency has taught me to love math and at the same time be baffled by it.

Cryptocurrency lesson 0: Altcoins and Bitcoin are not the same thing.
 

Offline NiHaoMike

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Re: Show your prototype board
« Reply #13 on: January 17, 2018, 01:39:15 pm »
And now a HD audio DAC:
Cryptocurrency has taught me to love math and at the same time be baffled by it.

Cryptocurrency lesson 0: Altcoins and Bitcoin are not the same thing.
 
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Offline Dubbie

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Re: Show your prototype board
« Reply #14 on: January 17, 2018, 01:52:45 pm »
I need a stiff drink after looking at that NiHaoMike!
 

Offline Barbouri

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Re: Show your prototype board
« Reply #15 on: January 21, 2018, 02:26:01 pm »
Latest prototype version 2.25 of the Programmable Voltage Reference project.

Blog post of 2.12 version at https://www.barbouri.com/2016/07/23/programmable-voltage-reference-v2-12-completion/

 
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Offline rx8pilot

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Re: Show your prototype board
« Reply #16 on: January 22, 2018, 07:01:28 am »
Why did you air-float the pins of the reference?

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Offline Barbouri

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Re: Show your prototype board
« Reply #17 on: January 22, 2018, 08:51:35 am »
Quote
Why did you air-float the pins of the reference?
Hi rx8pilot,
The reason for floating the "NC" pins and the PCB “peninsula” is to reduce leakage, thermal and mechanical stress on the voltage reference IC.
See Linear Technology’s Application Note AN-82 page 5 and 7, for a detailed explanation.
http://cds.linear.com/docs/en/application-note/an82f.pdf

Barbouri
 

Offline rx8pilot

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Re: Show your prototype board
« Reply #18 on: January 22, 2018, 10:40:18 am »
Wow! That is nano volt stuff where everything influences everything.

Is it working as designed?

Short and misplld from my mobile......

Factory400 - the worlds smallest factory. http://www.youtube.com/c/Factory400
 

Offline jpanhalt

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Re: Show your prototype board
« Reply #19 on: January 22, 2018, 11:07:56 am »
In the past few years, I have gone to solderable prototype boards for anything except the most simple, temporary circuit.  I prefer PTH and a layout that mimics the "standard" breadboard, but I have used other layouts.   Here's an example of the former for some work with WWVB:

http://www.eevblog.com/forum/chat/show-your-prototype-board/?action=dlattach;attach=388536


John
« Last Edit: January 22, 2018, 11:10:30 am by jpanhalt »
 
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Offline Barbouri

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Re: Show your prototype board
« Reply #20 on: January 22, 2018, 12:04:20 pm »
Quote
Wow! That is nano volt stuff where everything influences everything.

Is it working as designed?

Yes, the circuit is working well. These prototypes are mainly to try out different voltage references, output op-amps, and layouts to further reduce noise.
Currently the analog component noise is well within specs, but there is still more digital noise getting into the analog section than I would like.

Barbouri
 

Offline Yansi

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Re: Show your prototype board
« Reply #21 on: January 22, 2018, 08:23:56 pm »
Quote
Why did you air-float the pins of the reference?
Hi rx8pilot,
The reason for floating the "NC" pins and the PCB “peninsula” is to reduce leakage, thermal and mechanical stress on the voltage reference IC.
See Linear Technology’s Application Note AN-82 page 5 and 7, for a detailed explanation.
http://cds.linear.com/docs/en/application-note/an82f.pdf

Barbouri

I think you did not pay much attention reading the appnote, did you? The orientation of the stress releasing slots is wrong.  This way when the PCB is bent in the longitudal axis, the stress is coupled almost directly into the IC. Also no reason for floating the NC/DNC pins. REF50xx is nothing worth such care.
 

Offline BU508A

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Re: Show your prototype board
« Reply #22 on: January 22, 2018, 09:14:26 pm »
I think you did not pay much attention reading the appnote, did you? The orientation of the stress releasing slots is wrong.  This way when the PCB is bent in the longitudal axis, the stress is coupled almost directly into the IC. Also no reason for floating the NC/DNC pins. REF50xx is nothing worth such care.

The AN is from LT but the chip used is from TI. Probably there is a difference? Is there a similar AN or something from TI? On a short search, I did not find anything.

Thanks.
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 

Online MasterTech

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Re: Show your prototype board
« Reply #23 on: January 22, 2018, 09:15:00 pm »
This is the prototype im most proud of, a 2500 to 5V buck converter, and it works ^-^
 
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Offline richard.cs

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Re: Show your prototype board
« Reply #24 on: January 23, 2018, 12:48:29 am »
This is the prototype im most proud of, a 2500 to 5V buck converter, and it works ^-^
Can you tell us more about that? It sounds interesting.
 


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