Show your prototype board

[001]

Show your prototype board (also custom-made bredboards and breakout boards)!



I interested  in hardware prototyping technics

[rx8pilot]

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....

[Yansi]

I'll add one myself to the collection.

[001]

awesome 

[rx8pilot]

I'll add one myself to the collection.

Big POWER !!

[Red Squirrel]

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.   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.

[georges80]

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.

[Z80]

Wow, your prototypes are all so neat and tidy, I feel ashamed 

[rdl]

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.

[BU508A]

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.

[NiHaoMike]

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.

[NiHaoMike]

I suppose parts of the PC I'm still using as my main PC counts as well.

[NiHaoMike]

And now a HD audio DAC:

[Dubbie]

I need a stiff drink after looking at that NiHaoMike!

[Barbouri]

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/

[rx8pilot]

Why did you air-float the pins of the reference?

[Barbouri]

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

[rx8pilot]

Wow! That is nano volt stuff where everything influences everything.

Is it working as designed?

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

[jpanhalt]

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:

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


John

[Barbouri]

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

[Yansi]

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.

[BU508A]

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.

[PartialDischarge]

This is the prototype im most proud of, a 2500 to 5V buck converter, and it works

[richard.cs]

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.

[fourtytwo42]

Here is something of mine before I blew it up in the name of experimentation (or was that a small oversite)