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46  Topics / Home Automation and Networked Objects / Re: Looking for ideas on Heat Pump Controller - Power/WIFI on: December 14, 2012, 11:39:11 am
Thanks
47  Topics / Home Automation and Networked Objects / Looking for ideas on Heat Pump Controller - Power/WIFI on: December 11, 2012, 01:16:55 pm
Hi

I have spent quite a bit of time lately trying to decode a Mitsubishi Heat Pump remote control IR signals so I can simulate via Arduino + c# app.

I finally have it mastered and I can now turn the unit on/off, control the mode, control the temperature, control the fan speed, control the swing so pretty much everything I want.

The next problem for me is that I would like to make a small unit (minimal Arduino) that will site in front of the heat pump (about 6 meters in front).

The problem's I see are:

1) I need power to the device
2) I need to send signals to the device to tell it what to do.

What I would like is to automate this so I can have the system automatically maintain a comfortable temperature based on other temperature sensors I already have.

So I need to send a simple Wifi/Bluetooth/2.4G or 443 Mhz signal.

I guess anyone who does any projects like this runs into the same problems - power and communicating with the unit.

The unit location means I do not want to run cables down the wooden beam as it would detract from the beam and it is in my living area.

My ceiling cavity is not accessible either (well I do  not think it is)

Because of the requirement for some sort of wireless communications I know that batteries is a bad idea, but I need power.

I guess if I run cable for power then I could run a serial cable as well.

So just looking for ideas from people who have had similar projects?  What did you do?

Chris
48  Using Arduino / Networking, Protocols, and Devices / Re: How to detect loss of ethernet network? on: October 12, 2012, 10:17:34 pm
Probably a bit of my conform zone - I was hoping there was a quick and simple method.

Chris
49  Using Arduino / Networking, Protocols, and Devices / How to detect loss of ethernet network? on: October 12, 2012, 03:37:53 pm
I have an Ethernet shield and am using the standard Ethernet library.

What is the best way to detect that for example the network is no longer available?

If I pull a cable out of my PC it knows pretty quickly that it is not there any more.

Is there a status I can check for?

Chris
50  Using Arduino / Project Guidance / Re: Running Arduino on 12v + running load on same 12v? on: September 30, 2012, 11:50:10 pm
otherwise your arduino's voltage regulator might run a little warm, but it should be fine as it has protection in the IC

I have also purchased one of these:
 
LM2596 DC-DC Step Down CC-CV Adjustable Power Supply Module Output DC 1.5V-35V

http://www.ebay.com/itm/LM2596-DC-DC-Step-Down-CC-CV-Adjustable-Power-Supply-Module-Output-DC-1-5V-35V-/250954117473

Not sure if I need it since I am unsure if this is better than the simple Voltage Regulator on the arduino?

Would it be worth putting this inline?

Chris
51  Using Arduino / Project Guidance / Re: Running Arduino on 12v + running load on same 12v? on: September 30, 2012, 11:43:40 pm
if its not crowbaring the power supply it will be fine, as far as protection you want to throw a diode across the solenoid ( cathode to + side, anode to - side) so it wont spit out back EMF on your power lines causing spikes and noise

Thanks for the info - any ideas on the spec of the diode? or maybe a part # for me to look into?

Chris
52  Using Arduino / Project Guidance / Running Arduino on 12v + running load on same 12v? on: September 30, 2012, 11:20:30 pm
Hi all

I want to run my Arduino Mega on a single 240v to 12v DC supply that I have.

The 12v DC output is rated at 1a

My circuit will be quite simple:

* Power Arduino Mega - it will run Ethernet, RTC Clock, and a Relay board used to turn on and off the solenoid
* Power a 12v solenoid - seems to pull about 300m-500ma (not sure of the startup current) - see http://nicegear.co.nz/robotics/12v-solenoid-valve-34/

The relay board is from EBAY - see http://www.ebay.com/itm/1-Channel-5V-Relay-Module-for-Arduino-8051-AVR-PIC-DSP-ARM-/180982430549?pt=LH_DefaultDomain_0&hash=item2a2364bb55

Directly wiring up the solenoid to the transformer seems to work fine turning it on an off.

I am planning on just splitting the 12v between the Solenoid and Arduino.

My question is how much of a drain does this put on the Arduino? Could it cause it to lockup while switching on/off?

Should I add any sort of "protection" to the Arduino side of the power supply?  If so what?

Cheers

Chris
53  Using Arduino / Installation & Troubleshooting / Re: Arduino Driver - ATMega2560 - Windows 8 RTM on: September 18, 2012, 02:00:34 pm
Thanks for the tip - I right clicked on the Arduino MEGA 2560.inf and selected install and then it installed.

Funny how when I told Windows to go to the Arduino\Drivers folder it did not find anything?

But I am now away under Windows 8 so thank you for the advise.

ps: I have also enabled the unsigned driver option in Windows.

This method does not require new driver files or installation of a test signature.

1. Windows Key + R
2. Enter shutdown.exe /r /o /f /t 00
3. Click the "OK" button
4. System will restart to a "Choose an option" screen
5. Select "Troubleshoot" from "Choose an option" screen
6. Select "Advanced options" from "Troubleshoot" screen
7. Select "Windows Startup Settings" from "Advanced options" screen
8. Click "Restart" button
9. System will restart to "Advanced Boot Options" screen
10. Select "Disable Driver Signature Enforcement"
11. Once the system starts go to Arduino/Drivers folder and right click on the Arduino device you have and select install.

I think you should be good to go then.
54  Using Arduino / Installation & Troubleshooting / Re: Arduino Driver - ATMega2560 - Windows 8 RTM on: September 18, 2012, 02:57:08 am
Really hoping someone can give me another idea for a driver for AtMega 2560 on Windows 8 RTM

Chris
55  Using Arduino / Installation & Troubleshooting / Re: Arduino Driver - ATMega2560 - Windows 8 RTM on: September 17, 2012, 04:11:44 am
Thanks, but I am not getting a driver error - it says no driver found at all.

I have also enabled the Windows 8 Advanced Boot option about unsigned drivers.

But it is not finding a driver at all so it is not complaining about what it found!

Thanks

Chris
56  Using Arduino / Installation & Troubleshooting / Arduino Driver - ATMega2560 - Windows 8 RTM on: September 17, 2012, 03:55:03 am
Trying to get Arduino ATMega 2560 driver installed on Windows 8 RTM.

It shows as no driver installed.

If I point to Arduino\Drivers it says no driver found.

Any ideas?

Chris
57  Using Arduino / Project Guidance / Re: Aquarium Lighting - LED - 86cm deep on: August 29, 2012, 02:04:20 pm
Thanks for the links - really useful.

I came across some more videos on YouTube and this one (source included) looks interesting...



Main Features:
•5 separate LED Channels for White, Blues, Royal Blues, UV, and Red
•6th Channel for a Sump/Refugium LED Light
•7th Channel devoted to a Real Time Lunar Cycle
•Advanced LED testing features
•Water & Heatsink Temperature Sensors
•Control of a Heater and Chiller
•Audible & Visual Alarm Notices for Defined Temperature Variances
•LED Heatsink Temperature Sensor
•Dynamic Speed Control for Heatsink Fans (Display & Sump Lights)
•Wave Maker / Powerhead control
•Automatic Fish Feeder
•24HR & 12HR Time Formats AND Month DD, YYYY & DD/MM/YYYY Date Formats
•Settings & Preferences stored in EEPROM (Arduino Memory)

Although mine is fresh water - most of this could be really good for me to play around with.

Chris
58  Using Arduino / Project Guidance / Aquarium Lighting - LED - 86cm deep on: August 25, 2012, 09:49:48 pm
I am interested in updating my aquarium lighting - currently two florescent tubes that sometimes flicker when they start.

They are not great but OK.

I would be interested in changing this to LED - I need the LED to:

1) Make my fish Look Good
2) Grow Plants
3) Grow Plants better than my florescent tubes.

I have seen some projects but they are not related to growing plants.

Aquarium Model:
UFO 880
 
Dimensions Tank:
135W x 74H x 77D cm
 
Dimensions Cabinet:
135W x 76H x 86D cm
 
Capacity:
305 L
 
Lighting: 
2x30w PL + 1x20w Flourescent  (Note; NEW SPEC - not MINE)
 


The tank is quite deep 86cm so it is important for light to reach the bottom of the tank for plants to grow down there.

At this time just interested in ideas on LED - I know you can buy "grow lamps" for "indoor gardens" but I want to make this myself.

I know you can get 1W and 2W and 3W leds.

If you have some thoughts or web urls' I would appreciate it

chris
59  Using Arduino / Project Guidance / Re: Looking for ideas on 19" rack mount for Arduino on: August 15, 2012, 12:38:05 am
I am mainly looking at Monitoring Temperature, Humidity but would like to get into Water Leak Detection as well

Are you aware that you can get USB dongles off the shelf that just plug into a handy USB port to do that sort of thing? It seems a bit over the top to add a DIY microcontroller and take up a slot in the rack just for that.

I guess we should not do anything then since everything has already been created!
60  Using Arduino / Project Guidance / Re: Looking for ideas on 19" rack mount for Arduino on: August 14, 2012, 07:41:42 pm
You did say "Professional looking" and this would certainly fit the bill.
    http://www.protocase.com/products/index.php?e=Rackmount
Googling "rackmount project box" turns up additional results.

If you want to do it yourself then you want a "sheet metal nibbler". A manual nibbler will run ~$10 or pneumatic ~$40. Beyond that you would need to move to a milling machine or plasma cutter process. If your total case is light enough you might be able to replace the metal front with an plastic front (ABS or acrylic, etc.) which Pololu.com could cut for you.

Out of curiosity, what are you monitoring? Temperatures or power strips?

Thanks for that - I was thinking when I posted that if I would just get told to go google. But this is quite cool and even has it's own 3d Editor for designing the boxes.

I am mainly looking at Monitoring Temperature, Humidity but would like to get into Water Leak Detection as well

Chris
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