CraftBeerPi - Raspberry Pi Software

SHvanBommel · Aug 31, 2016

Any reason I can't use 2n2222 or 2n2222a or 2n3904 instead of the bc337?

terragady · Aug 31, 2016

i guess you can, you can basically use any NPN transistor which will saturate with given current and be more than lets say 500mA
you can also use some mosfets but then the pinouts might be different

SHvanBommel · Aug 31, 2016

So I could mix 2n3904 and 2n3906 so long as they are the same pinout?

terragady · Aug 31, 2016

2n3906 is PNP not NPN. I have never used them to I do not know but if they meet requirements they should work, just check datasheets and compare to bc337 for example, check maximum ratings. In our case there are no high currents or voltages here.

SHvanBommel · Sep 1, 2016

Sweet, looks like 2n3904 is a suitable replacement for the bc337, it saturates at 200ma vs the 800 of the bc337. The only change is that it needs to be rotate 180 degrees when placing it on the pcb and looking at silkscreen orientation.

terragady · Sep 1, 2016

800mA is not a saturation from base, its a current limit collector-emitter i think, so basically how much SSR can draw which is fine because it use ~20mA.

SHvanBommel · Sep 1, 2016

you're right, it seems the data sheet only talks about base-emitter saturation from the voltage standpoint.

terragady · Sep 1, 2016

that you can calculate, but if its similar to bc337 you are fine, take notice that GPIOs from raspberry are 3v3 only and 20mA max. But still most of transistors would work. You could have a bigger problem with MOSFETs but there are also logic level mosfets which will work.

SHvanBommel · Sep 1, 2016

yeah, all looks good on both ends, i'll try with these while bc337's arrive on the slowboat from china and i will update.

arvix · Sep 1, 2016

Hello guys!

There is any chence use RTD PT100 sensors on craftbeerpi?

SHvanBommel · Sep 1, 2016

Not without one of these:

http://www.playingwithfusion.com/productview.php?pdid=25

Bigdaddyale · Sep 5, 2016

I just ordered a set of terragady's pcb from Dirt Cheap.If anybody is interested in getting one comment on this post. I price them just enough to cover postage and to break even. I will send a board to terragady so there should be 7 to 8 boards available.
Version 4.1

SHvanBommel · Sep 5, 2016

Int, which set, v3 or v4

Bigdaddyale · Sep 5, 2016

SHvanBommel said:
Int, which set, v3 or v4

I knew I was forgetting something. It's his latest file which is v4.1

SHvanBommel · Sep 5, 2016

Sure, how much?

Bigdaddyale · Sep 5, 2016

SHvanBommel said:
Sure, how much?

I'm thinking $4.00 including shipping in the USA.I have to see how many boards the manufacture ships to me.

SHvanBommel · Sep 5, 2016

I'll take 3

Bigdaddyale · Sep 5, 2016

SHvanBommel said:
I'll take 3

This is just the PCB with out the components I'm offering -just so there is no misunderstanding.

SHvanBommel · Sep 5, 2016

I'm clear, I have enough components for three.

KiwiRob · Sep 5, 2016

I'm interested in 2.

Bigdaddyale · Sep 5, 2016

SHvanBommel said:
I'm clear, I have enough components for three.

Do you have a BOM list for this project?Maybe someone can set up a Mouser BOM and post the link.

Bigdaddyale · Sep 5, 2016

SHvB=3
KiwiRob=2
Schaze= 1
gromitdj= 1

terragady · Sep 5, 2016

Nice to hear that someone is using my designs

I am not sure what this PCB house is making but check if it is not toxic, I heard some has toxic components and heavy metals on surface like lead. Dirty Cheap is also a prototyping (i think you have chosen this option) so not all of them may work, please double check this although design is pretty straightforward with huge distances between traces so should be fine

Let me know how they did it!

schaez · Sep 5, 2016

I'm interested in 1.

Bigdaddyale · Sep 5, 2016

terragady said:
Nice to hear that someone is using my designs
I am not sure what this PCB house is making but check if it is not toxic, I heard some has toxic components and heavy metals on surface like lead. Dirty Cheap is also a prototyping (i think you have chosen this option) so not all of them may work, please double check this although design is pretty straightforward with huge distances between traces so should be fine Let me know how they did it!

Thanks for the blessing and sorry for not giving you a proper slap on the butt -it is college football season- earlier on in this thread.Not sure about Dirt Cheap's environmental practices,and I wouldn't be surprised if half of the Chinese crew spent the off season hunting whales. disappointed, but not surprised. They put out what they advertise- Cheap PCB boards.I got the thumbs up from a respected member of this site about the quality of the boards, so I confident the pcb manufacturing part of this project is solid.The lead content ,dolphin killing part I'm interested in but have know Idea.

gromitdj · Sep 6, 2016

I'd be interested in getting one as well, if still available.

terragady · Sep 6, 2016

haha right

I didn't mean about practises and environment what they have there, I meant your safety to NOT be poisoned by some additives or heavy metals. Sounds ridiculous but actually very small traces of some compounds might be bad for you. I work in molecular biology lab and we had cases of such things.
Other than that I hope you will be happy with the boards, I heard that Dirty Cheap are doing nice job but if you have some complicated boards then it happens that not every board is working (not this case).

I would love to have your feedback back so I can improve the board for future use.
I actually cannot decide what to use for my main setup, stay with ArdBir with dutch software or move to CraftBeerPi. I might try to use RaspberryPi Zero and check if it will be enough to run the software. I have pretty small and easy setup. One pot, one mesh basket, pump and heating element of 2kW. (plus plate chiller, hopstopper etc).

SHvanBommel · Sep 6, 2016

quick question, when orienting the mp1854 on the on the board there's in+ and in- and out+ and out-. where do the out + and - go? I think + goes to 5V pin2 (L/R from "top") ansi'm not sure where out- goes.

SHvanBommel · Sep 6, 2016

Also, are there any Kernel mods that need to be done in order to use different pins for 1wire?

terragady · Sep 6, 2016

both "-" are ground, same ground, it doesnt matter. You just need to worry about "+" so +IN is 12V and +OUT is 5V, double check with multimeter if there is 5V on output, if not you have small screw there to regulate it. It is pretty stable. I love those small bucks

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