PDU #9 - Why Do I Do It? [Upcycle It Challenge]

18 May 2017

Ever get so far in a task/project and wonder if it is worth doing or if you could do it over if you would do it different? I know, all the time. This weeks update is no different. I was making my relay control board that I mentioned in the last BLOG entry and I have had a hundred "why am I doing this" moments when making this circuit.

Here is the circuit I am building, but eight of these, so they will fit on one board right? Oh my, yes, but in hind sight I might have done it different. Maybe even etched a board and I have not etched a board in 25 years, since high school.

I have added a 7805 and a few capacitors to get 5V. I will bring in 12V from the Edison interface board and then return 5V to the Edison board for use with the LCD. Only other thing I am missing on the board is pins to run to the LED board. I have tested for continuity and made sure all that needs to be isolated does not have continuity. Also there is a dual line header at the end opposite of the relay header and that will be for a ribbon cable to the Intel Edison board.

Here is what it looks like:

{gallery} The Board
Top view. I cannot imagine putting anything more on this board, this was almost too much already.
Bottom
Mated with the relay board
Another view of it mounted.
Bottom view
Side view, sporty and fast.

{gallery} The Board

Top view. I cannot imagine putting anything more on this board, this was almost too much already.

Bottom

Mated with the relay board

Another view of it mounted.

Bottom view

Side view, sporty and fast.

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Workshopshed over 8 years ago

I was planning on soldering up something very similar in the next few days but with 3 outputs and two inputs. PCBs are good if you know what you will need early on but you need to get those critical path items sorted early in the project. So it's a bit late for me.
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jasonwier92 over 8 years ago in reply to Workshopshed
I would not have done the power conversion on this board if I planned it better. There was already two changes:
- First I was doing the LED resistors here, but decided that was not needed, it can be the LED circuit and it would be less wires.
- I had all the transistors running 90 degrees to where they are now, but then decided ground side and 5V side
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jasonwier92 over 8 years ago in reply to jasonwier92

Oh and looking back, I would have run the ground around the outside and the 5V down the middle, just because I think that design is better.
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Workshopshed over 8 years ago in reply to jasonwier92
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Workshopshed over 8 years ago in reply to jasonwier92
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