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Rich S.

Hardware Discussion  - 
 
Hi everyone, I have been struggling with the Wiring PI aspect of this project. I have a B+ model with a breadboard attached with LEDs.When I follow the GPIO Readall, the numbering doesn't match up.

Example - Wiring PI indicates that channel 3 should be at physical pin 15 but through trial and error, I found channel 3 at 26. 

Any ideas as to the issue?

I am still trying to locate channels 0 and 4, but have gone through each pin individually. I attached a photo to help. 

Thanks everyone. I apologize if this is a noob mistake. :)
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Tom Enos's profile photoBruce Goheen's profile photo
2 comments
 
Just at a glance is this ribbon cable perhaps backwards on the pi side?
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Raspiono Lelono

Hardware Discussion  - 
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chris usey
moderator

Hardware Discussion  - 
 
Interesting ! I like the fact that HDMI is on a breakout board because it something I don't normally use anyway.  Would love to know the amount of GPIO and types it has.  http://makezine.com/2015/05/07/next-thing-co-releases-worlds-first-9-computer/
Cheaper and more powerful than Raspberry Pi, "Chip" by Next Thing Co. could be the next revolution in single-board computing.
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Bruce Goheen's profile photoTom Enos's profile photo
2 comments
 
8 digital GPIOs, one PWM pin, SPI, TWI, UART, USB, MIPI-CSI, Parallel LCD output, touchpanel input, and a whole bunch of power rails in and out. Most of these are set by the processor, but others are still subject to change as we finalize part selections. We’ll post more specific pinouts and electrical specs when we have finalized the design for “Alpha” modules in September.

https://www.kickstarter.com/projects/1598272670/chip-the-worlds-first-9-computer#project_faq_132940
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Jason Telemax

Hardware Discussion  - 
 
Kernel panic on B Rev 2.

My brother-in-law and myself both got our lps set up in the last few weeks. Amazing piece of software! He is running off of a b+ plus, I have a B rev2. With almost identical wiring, outlets, and everything, using saensmart mechanical relays from banggood. If i activate more than three channels, I get a kernel panic a few seconds into a song. His b+ just barrels through.

I'm not sure if this has to do with the lower power consumption of the B +, or if it is just able to sink more current than the B. Has anyone else ran into any problems powering 8 relays and controlling them with the B revision 2?
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Tom Enos's profile photoJason Telemax's profile photo
4 comments
 
Will do. Thanks! 
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Duncan Lam

Hardware Discussion  - 
 
Does anyone have suggestions on wiring for the RasPi B+? 
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chris usey's profile photoDuncan Lam's profile photo
2 comments
 
Thank you, I got it all figured out.
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paul dunn

Hardware Discussion  - 
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paul dunn's profile photoCarlton and Melody Cabral's profile photo
2 comments
 
Thanks for the share
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chris usey
moderator

Hardware Discussion  - 
 
Updated schematic to correct error in previous posting.
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Todd Giles
owner

Hardware Discussion  - 
 
So I bought an RGB led strip to play around with from one of the myriad chinese outfits on ebay - will look on adding support for it in interesting ways to my light show for next year, or for potential installation in our basement for karaoke / dance / etc... time will tell.  I'll post more about it once I get it and make the time to play with it ;)

Note, I opted to start with the cheaper ones, i.e. not the individually controllable RGB led strips, as I'd like to continue to focus on ways to make relatively inexpensive light shows compared to other more expensive options already out there.

Link to the leds I've initially purchased:

http://www.ebay.com/itm/371206878520?_trksid=p2060778.m2749.l2649&var=640343925622&ssPageName=STRK%3AMEBIDX%3AIT

If others of you have experience with these already, I'd be interested to hear about it.  Otherwise, I'll let you know how it goes in a future post.  They won't arrive for several weeks (coming from China), but excited to play with them once they arrive ;)
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Yohan Bohan's profile photo
13 comments
 
But I think it no more than a dumb rgb strip that can be controlled via DMX using USB DMX dongle. The DMX controllers use the same MOSFETS transistors. 
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chris usey
moderator

Hardware Discussion  - 
 
A pic of my first attempt at creating a custom board for the expander chips. This one is designed so that I can set the chip address with the three rows of pins and some jumper cables. I'm sure dip switches would have been cleaner but I don't have any currently. I have soldered before but never created a board from scratch. I'm sure some of my methods are not by the book but it works and I learned a lot for my first try !
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chris usey's profile photopaul dunn's profile photo
8 comments
 
I drew up a schematic for a board with 3 expander chips on it. Was thinking that it and Pi could be together and then run CAT5 from this board out to remote relay boxes. Only problem with that is with the 8 conductors I could only run 7 relays per CAT5 pull. Wire with more conductors seems really pricy. Ebay prices are still $1/ft.
If SPI or I2C will daisychain over distances, your idea might be better overall
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ben ellis

Hardware Discussion  - 
 
I am trying to put a build list together for my build of my box for 8 channels. I was looking at the extension cables that have a female plug at one end and wire at the other. Can someone tell me what those are called or where to get them? I was going to build the outlets but i think the cables will allow me to have more space in the enclosure that i chose. 

Here is my list so far.

Rasberry Pi 2 with Canakit and wifi starter kit - $84.99
or
Rasberry pi 2 with canakit - $69.99
Breadboard and gpio board - $14.99


5V Eight 8-Channel Relay Module With optocoupler - $5-10
or
SainSmart 8 Channel 5V Solid State Relay Module Board - $20-35 1- Power plug and casing for power to pi - $5

Rg-59 copper wire $15-20 

Enclosure: 
http://www.lowes.com/ProductDisplay?partNumber=145145-223-E989N-CAR&langId=-1&storeId=10151&productId=3260229&catalogId=10051&cmRelshp=req&rel=nofollow&cId=PDIO1 Plastic Case - $22.98

Just need to add the outlets or the extension cable and then maybe some small sheets of ply wood and screws.. etc.. 

Anyone got a shopping list like this or atleast can help me point in the direction of the extension cables im looking for?
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ben ellis's profile photo
11 comments
 
I will test it since I ordered it and I'll let you know what I find out. If not I'll just send it back as defective and do the pifm
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Per Fredelius

Hardware Discussion  - 
 
I'm trying to figure out the feasibility of making a worn-in-clothes lightshow that responds to external sound in real time. Something that is technically very similar to this (made with arduino): https://youtu.be/6sKBVGYkpFI?t=2m5s

It seems that this should be doable with Lightshow Pi but would additional hardware (even non-portable) hardware be needed?

I'm thinking a raspi, a Sound Adapter, a battery pack and lights should be the major components needed.
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Tom Enos's profile photo
 
LightshowPi supports audio in.  So all that is required for that part is a USB sound card or USB Mic.  

Todd Giles has a karaoke setup https://www.youtube.com/watch?v=yDx0S6-tLWI

Paul Dunn has a portable Halloween helmet https://www.youtube.com/watch?v=1k-N0t6B5Ps
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Alvin Wong

Hardware Discussion  - 
 
I'm new to this but I was able to hook up some leds to a breadboard and got ligtshowpi running. I'm thinking of trying to move onto Christmas lights but all tutorials I've seen involve some wire cutting. I want to check if there's any easier tutorials/instructions out there that don't involve any soldering or wirecutting. Thanks. 
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Tom Enos's profile photo
 
Look at this relay.  It's kind of expensive at $20.00 for one channel, so that adds up to $160.00 for a 8 channel setup, but no cutting, no soldering, just hook up 2 wires and your good to go.

http://www.powerswitchtail.com/pages/powerssrtail.aspx
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Gabozho

Hardware Discussion  - 
 
Hi! I have a question about the 8 channel relay board. I already own a 4 channel relay module board and I was wondering if I could work with that instead of buying the 8 channel board?
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Tom Enos's profile photoErik V's profile photo
2 comments
Erik V
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1
 
You will just have to channel the number of channels in the settings. This way it will capture the full range of frequencies.
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Raspiono Lelono

Hardware Discussion  - 
 
This is the video.
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Raspiono Lelono

Hardware Discussion  - 
 
Hi all

I tried lightshowpi with little knowledge of electronics and coding, and successfully to this stage. See youtube: https: //youtu.be/NplF1jHvbUc

But still I failed to connect relay module with the lights. I am using a mechanical relay modules (erm). Is't there a way that I can using as example use of a mechanical relay modules besides solid state (ssr)?

thanks

Sorry with my english is messed up.
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Raspiono Lelono's profile photo
17 comments
 
Yes. I didn't relay data sheet. Success. Thanks for all.
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Harry Saliba

Hardware Discussion  - 
 
Just a couple quick questions from someone who is a bit more comfortable with the software side of things than the hardware side.

1. How would I configure the LightShow to just the gpio pins on the 2b/b+? I read through the config.cfg and I see options to use them but only with an IC.  I tried to just type: gpio_pins = 0,1,2,3,4,5,6,7,22,23,24,25,26,27,28,29 and I got some python errors regarding the function "play_start()".

2. Where could I find a complete wiring diagram for connecting a IC?  I have found the documentation on this subject very light, ie just explaining what ICs work and the configs for them but what pins to I connect to the ICs?
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Harry Saliba's profile photoTom Enos's profile photo
5 comments
 
Your welcome.
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paul dunn

Hardware Discussion  - 
 
scored 20 more Opto22 10amp SSRs for $2.15 each ;-)
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paul dunn's profile photoDaniel D'Amato's profile photo
3 comments
 
Gotta check into some of them. 
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Daniel D'Amato

Hardware Discussion  - 
 
So I had my first circuit boards printed from a company called Oshpark.  Fantastic job.

Here are a few pictures of how the boards were received and after it was populated.  This was the first time I ever soldered on a circuit board.  I got 3 boards and Oshpark charged me $27 not too bad.  The more you order the cheaper the boards are.  I also got the pin headers from a company called Futurelec.  Shipping took forever but they finally go here.  I bought the chips and chip riser on ebay,  a pack of 10 Chips were $14.42 shipped and a pack of 5 risers were $6.07 shipped.  Total cost of each board is $11.79 for everything.  I know there are already solution out there for this but I just wanted to see if I could design and populate the board.  I am happy with how they turned out.

I have metered ever pin and I have no solder points touching each other and all pins pin out correctly with each other.  Now all I have to do is test it with my Pi to see if this works.
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Colin Haven's profile photoTom Enos's profile photo
2 comments
 
Looks great and positive feedback for Oshpark, looking forward to the results of this endeavor.    

Please post your results.
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Mypifi

Hardware Discussion  - 
 
I don't know how useful this will be to everyone, but it's an add on board for raspberry pi that controls neopixel lights all done by the pi. It's £6 a board all you need to supply is the neopixels and power supply.
Paul Brown is raising funds for MyPiFi NeoPixel Controller Board for Raspberry Pi on Kickstarter! A quick, easy way to start controlling neopixels on a Raspberry Pi
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Mypifi's profile photo
7 comments
Mypifi
 
124% funded and into final hours.
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chris usey
moderator

Hardware Discussion  - 
 
If you are still in need of lights or other hanging hardware checkout you local walgreens. I just scored 17 52ct boxes of gator grip clips and 9 boxes of gator grip stakes for 0.29 a piece throw on top two gingerbread houses to keep the kinds entertained and I made out for 14$. Surprisingly these places still have a lot of Christmas stuff on the shelves for close to 70 to 90% off
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Bruce Goheen's profile photopaul dunn's profile photo
2 comments
 
stopped at one yesterday, no clips, no lights, but they did have 9' outdoor extension cords for $2.99 and 9' indoor cords for $1.99.
thinking about grabbing 8 of the outdoor for the 2nd 8 channels on my main controller.
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