redtop's Ferduino controller

are you happy with it? and what else does it do? has some thing there the 5v is connected to... looks cool
 
Rott You can connect a 5 volt regulated power supply to the two screw terminals should back feed the arduino needs a few more tweaks that cool looking thing is your reverse voltage protection the jumpers up near the rtc gives the option to use 18,19 or 20, 21
 
marspeed said:
Rott You can connect a 5 volt regulated power supply to the two screw terminals should back feed the arduino needs a few more tweaks that cool looking thing is your reverse voltage protection the jumpers up near the rtc gives the option to use 18,19 or 20, 21
Click to expand...

That's great. is the plan order a batch or refine further/ typically Is there a way to get the ethernet in the central board also ? ie. without memory element? either chip ?
 
marspeed said:
happy now root
picture.php
Click to expand...

nice work Marc, the reverse voltage protection is a nice addition, I really hadn't thought about that with mine....where do I need to sign up at to get some of these boards that you are designing ? :D

after looking at my boards a little closer, and a schematics, if you're powering via the USB port, it does have the protection, powering as I have mine now does not, I will be rewiring mine to use the USB ports 5v input like I said in a previous post....

I am not an electronic expert by any stretch of the imagination, I try stuff and if it works, great, if not, I buy a new board....I usually learn things the hard way though...I can tell you several ways how not to do some things LOL
 
Redtop I have some of the boards the screw sheild I need to clean up then off to the board house what I would like to do is stack the current board then a second board with a ULN and port expander now I am not sure what pins the port expander uses and may need a bit of guidance I have seen two diffrent connections and confused myself
 
Thanks rott I don't see hardly any screw sheilds like this at least I only found two and one was like almost 100 bucks but this board has the option of switching pins for the rtc or disconnecting it all together a handy feature if your using a port expander I beefed up the power traces if you want to back feed the arduino

Marc
 
marspeed said:
Redtop I have some of the boards the screw sheild I need to clean up then off to the board house what I would like to do is stack the current board then a second board with a ULN and port expander now I am not sure what pins the port expander uses and may need a bit of guidance I have seen two diffrent connections and confused myself
Click to expand...

what part is confusing you ? maybe I can explain it correctly

from the Mega, the expander only needs the 5v, ground, and pins 20 and 21, the RTC is moved to pins 18 and 19 when the expander is used

you'll have up to 16 extra channels with the expander, the code has only 5 of those used for now, but there's plenty of room for upgrade and I believe I read somewhere that Fernando will soon be adding more....

once his updates are added, I'll do my best to update the 7 inch code as well

here's the technical data for the IC http://www.ti.com/lit/ds/symlink/pcf8575.pdf

and schematic I used for my PCF8575 from Fernando

image.php
 
Redtop that works
now as for the uln what pins on the arduino does it connect to I know it is used for tthe dosing pumps I also know how to connect the pumps to it and are there two uln ?
 
marspeed said:
Thanks rott I don't see hardly any screw sheilds like this at least I only found two and one was like almost 100 bucks but this board has the option of switching pins for the rtc or disconnecting it all together a handy feature if your using a port expander I beefed up the power traces if you want to back feed the arduino

Marc
Click to expand...

I've been looking for a good solution for a screw shield for several weeks, and this looks like the best design I've seen - by far. Nice Work!
 
marspeed said:
Redtop that works
now as for the uln what pins on the arduino does it connect to I know it is used for tthe dosing pumps I also know how to connect the pumps to it and are there two uln ?
Click to expand...

you'll have 2 or 3 ULN ICs, here's the schematic for the 2003 used for the dosing pumps, it has 7 channels but uses only 6 if you use all 6 dosing pumps

8674999381_cdbd9cbec7_c.jpg


the ULN2803 connects exactly the same but adds 1 more channel for a total of 8, if you use all 16 channels of the PCF8575, you'll need 2 of these...

the 2803 can be used in place of the 2003 for the dosing pumps too

all the ULN ICs go between your relays and either the Mega for the dosing pumps or the PCF8575 for the 120v outlets

and I have about 380 of the ULN2803 chips so don't buy any :D
 
just when you thought it couldn't get any better
led power indicator , reset switch , proto section , power breakout next to proto +3v, +5v and GND
RTC with jumpers to enable or disable resistors or use pins 18,19 or 20,21 or just disable entire RTC
Terminals to back feed your arduino with regulated 5 volts plus reverse polarity protection and of course screw terminals for all pins

picture.php
 
marspeed said:
just when you thought it couldn't get any better
led power indicator , reset switch , proto section , power breakout next to proto +3v, +5v and GND
RTC with jumpers to enable or disable resistors or use pins 18,19 or 20,21 or just disable entire RTC
Terminals to back feed your arduino with regulated 5 volts plus reverse polarity protection and of course screw terminals for all pins

picture.php
Click to expand...

Nice, I want two!
 
Why not design one witth space for the mega chip itself? Or am I missing something (not that good at reading PCB)?

Tim
 
perkint
you plug it in to the mega it has screw terminals so you can connect wires to the mega very handy and a real time clock built in so you don't need to have a separate one a reset button that you can reach because the shield will bury the one on the mega and a few other features that will work well with Fernandos controller sketch
 
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