Hi

Is mega the only board that can do multiple serial?

thanks

fubbi

I would like to send/receive serial from a roomba over the tx/rx pins on a bluetooth arduino and use the bluetooth connection to send me serial monitor feedback.

Is it possible to write serial commands to two different outputs? And how do I address them individually?

thank you

fubbi

a. Yes.
b. Yes.
There are not much difference between LED and bulbs, except thermal inertia, which is good for PWM

awesome, thanks!

Now how do I calculate the amount of DC current a bulb with say 40w needs?

Basically, I intend to do this like I would a LED matrix, a 74HC595 shift register can't handle this right?
Do I need something more powerful, or transistors?

I am looking for the minimal solution, space and budget wise to do this...

fubbi

Hi

I would like to dim a bunch of (like 400) standard incandescent lightbulbs.

a. Can I run a standard bulb on DC? It would make things a lot simpler
b. Can I dim (plenty and fast) a standard bulb with PWM?

Basically I want to treat a bulb like a LED, but with a sturdier schematic of course...

cheers folks!

fubbi

How can I chain 4 of them? or do i need all those outputs for each chip?

thanks

fubbi

Hello

Does someone know how to wire up a DM74LS47N? (http://www.alldatasheet.com/datasheet-pdf/pdf/51079/FAIRCHILD/DM74LS47N.html)
The outputs for the segments are obvious but I do not understand the inputs.

I need to hook up 4 of them.

Thank you!

Fubbi

I just did a tutorial that uses the 7 segment display as an example of how to code:-
http://www.thebox.myzen.co.uk/Tutorial/Arrays.html

nice!

I guess dimming is a pipe dream. So if I go for switching I should still look at triacs right? I did a lot of relay switching but it is expensive and bulky.

fubbi

I am looking at building a large array of dimmable lightbulbs. Most dimmer circuits I looked at are quite complex (for me). Especially if you need 400 of them.
Any ideas how to simplify the process? Can I dim a lightbulb using a circuit like this http://www.velleman.eu/distributor/products/view/?id=9071 and PWM?

cheers

fubbi

hello Korman

Thanks, thats perfect, I am just about to connect the boards.

The board is powered by the 220v input as I understood it. I intend to power the arduino with the 12v coming out of the K6714-16, bad idea?

cheers

fubbi

Hi

There are some threads about this here, but nothing resolved.
Before I purchase a K6714-16 relay board http://www.vellemanusa.com/downloads/0/illustrated/illustrated_assembly_manual_k6714-16_rev1.pdf I have a few questions:

The assembly instructions states that:
Output 12V CC can be used as a power supply for other kits. Does this mean I could power a Arduino Mega with those 12V?

The ULN2803 type transistor array allows you to control the relays directly from a TTL or CMOS. For controlling the relay with open collector control, don't mount the transistor arrays. How does this apply to the arduino?

And last but not least, I can not figure out if I will be able to control this with my arduino digital outs. Is there enough power there to switch the relays? And do I need something between the arduino and the board?

Thank You

Fubbi

[A]

The manufacturer in china sent me the specs! Its all in there but I still dont get it :-)
I need to create one serial command to change "pages" from A to Z

that last debug suggestion worked

python toledo.py --debug -p "/dev/tty.usbserial" --link="A"  --output

gave me:
<ID00><TA>00010100009912302359A5B<E>

 --link="B"

<ID00><TA>00010100009912302359B58<E>

 --link="C"

<ID00><TA>00010100009912302359C59<E>

Hi

The help does not tell me what the serial data is, just how to control the script.

The debug flag just calls up the help again

Code:

toledo version 0.0.4.3
-------------------------------------------------------------------------
 Always use flags --message and --output last
-------------------------------------------------------------------------

-h (--help)       This screen
-v (--version)    Show toledo version
-p (--port=)      Set the port for use (default /dev/tty.usbserial)
-d (--debug)      Enable debug mode (verbose, call this flag first)
-s (--sid=)       Which Sign ID is in use (default 00)
   --intro=       Set the intro effect (1-16)
   --exit=        Set the exit effect (1-11)
   --bell=        Add a noise to your sign (0-4)
   --speed=       Set the movement speed (1-4)
-f (--font=)      Set the font used (1-5)
-c (--color=)     Set color on supported boards (red, green, orange,
                    ired, igreen, iorange, rog, gor, rainbow
                                     
    --page=       Which page to progam (A-Z)
    --runpage=    Run which programmed page (A-Z) (non-functional)
    --link=       Run which pages in which order (A-Z)
-l (--line=)      Specify line to program, on supported boards (default 1)
    --raw=        Send protocol specific commands
                    Include the FULL string to send, everything between
                    <IDn> and XOR checksum
-m (--message=)   Set the desired message (call this flag before output)
-o (--output)     Output to sign (call this flag last)

-------------------------------------------------------------------------
example: ./toledo.py --link="ABACAB" --output
example: ./toledo.py -p "/dev/tty.usbserial" -m "Holy Toledo" -o
example: ./toledo.py --intro="1" --exit="5" --speed="2" --inverse --page="B"
          --line="2" --message="Holy Toledo" --output

this is the page where i found the script http://freezerpants.com/toledo/

and this is the sign (the one with red leds): http://www.amplus.com.hk/LED_%20AM03127-H13.htm

the python script was the most info I could find so far

Hi

I unfortunately have no datasheet, but luckily I found a python script someone wrote for that display and got it to work.

Anything sent to the board must be in the script somewhere right? Where else would it come from?

thanks

fubbi