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by BMS Doug
Tue Apr 15, 2014 9:17 pm
Forum: Troubleshooting
Topic: LIRC GPIO Issue
Replies: 4
Views: 1398

Re: LIRC GPIO Issue

However, whenever I send a command like "irsend SEND_ONCE /home/pi/lircd.conf KEY_1", the TV only seems to respond to every other command. I have no idea why this is. I have rerecorded the TV remote commands into LIRC multiple times, reinstalled LIRC, purged it etc. Tried seemingly everything but I...
by BMS Doug
Tue Apr 15, 2014 9:08 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Transistor for IR Transmitter
Replies: 25
Views: 13110

Re: Transistor for IR Transmitter

Hi again, Could you try transmitting the same signal 3 times consecutively with a 400 millisecond delay? That seems to be a default setting on my tablets IR app (touchsquid), I'm not sure why but it seems to work for them. There are other settings to tweak within the app but these should have been p...
by BMS Doug
Tue Apr 15, 2014 12:30 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Transistor for IR Transmitter
Replies: 25
Views: 13110

Re: Transistor for IR Transmitter

[/quote]
tombsage wrote: I have recorded signals from my TV remote using LIRC's irrecord.
Do you have the ability to simultaneously transmit and record? that would allow you to analyse (with your LIRC IRrecord) the signal you are generating to see if there is a variation from the desired output.
by BMS Doug
Tue Apr 15, 2014 11:36 am
Forum: Beginners
Topic: Toggle a device with external power source
Replies: 7
Views: 1602

Re: Toggle a device with external power source

igwb wrote: I need to connect my device with a higher current to a ground different from the one connect to the Pi. Given that my "strong" power source is a battery, where would I get that ground connection from?
your ground for the battery is the battery's negative terminal.
by BMS Doug
Mon Apr 14, 2014 11:17 am
Forum: Beginners
Topic: Data Logging Using RPI
Replies: 2
Views: 1890

Re: Data Logging Using RPI

Hi vachhaninimiT, If your RTU's are Modbus slave units then you should be able to configure the RPi as a Modbus Master and regularly log data. Be warned that logging data regularly can eat your SD Card, so it may be better to write your log data to a removable USB stick (which will still be destroye...
by BMS Doug
Fri Apr 04, 2014 9:26 pm
Forum: General discussion
Topic: One button to power them all
Replies: 15
Views: 1960

Re: One button to power them all

Hi guys, after a lot of tinkering and working with others I have managed to get my project in a good place. As you can see I am using a portable power unit, two ultrasonic sensors which show the data on screen in "real time" as well as there calculated area. This is all great and exactly what I wan...
by BMS Doug
Thu Apr 03, 2014 11:13 am
Forum: Beginners
Topic: Servo and a button
Replies: 4
Views: 2559

Re: Servo and a button

while I think the Pi is a great invention I'm afraid that your application sounds like it doesn't need a Pi at all. take your garage opener remote and open it up. solder a pair of leads across the contacts that are made when the open button is pushed. attach the leads across the relay from the old c...
by BMS Doug
Thu Apr 03, 2014 8:51 am
Forum: Other projects
Topic: Screen Glasses
Replies: 8
Views: 1622

Re: Screen Glasses

Do you have make and model info?

does it have a usb port (maybe mini or Micro)?
Does it have an AVin (probably your best hope but still not a guarantee that it can be made to work with a RPi)
by BMS Doug
Wed Apr 02, 2014 3:11 pm
Forum: Advanced users
Topic: S0 Pulse counter
Replies: 8
Views: 8940

Re: S0 Pulse counter

Hi matizzy, Do you have a link to the datasheet for the pulse meter that you are using? The reason that I ask is that different energy meters operate in different fashions, if your meter is a two wire one then it will probably need a different set of connections from the three wire pulse meter in th...
by BMS Doug
Mon Mar 31, 2014 3:59 pm
Forum: Beginners
Topic: choice of screen??
Replies: 1
Views: 388

Re: choice of screen??

I saw this video on you tube where Ben Heck makes the same thing, I hope this helps.

Doug
by BMS Doug
Mon Mar 31, 2014 2:49 pm
Forum: Beginners
Topic: New user. Logged in. What do we do now?
Replies: 6
Views: 1283

Re: New user. Logged in. What do we do now?

I don't want my RPis to default to a GUI, I never use the GUI - so for me the default value is ideal. You & me both, of course. But the salient points are: 1) We're smart enough to fix it. 2) The default should be what is desired for the majority of people (even if that majority is 51%). And even i...
by BMS Doug
Mon Mar 31, 2014 2:34 pm
Forum: Automation, sensing and robotics
Topic: Beer Brewing Automation
Replies: 3
Views: 1607

Re: Beer Brewing Automation

did you fix your issue of the flame detection sensor melting?

you could try an optical sensor, flame gives light, no flame = dark as long as the sensor isn't going to be subject to light level variations from other sources.

Edit: Ah, reading the blog entries shows that you had considered this.
by BMS Doug
Mon Mar 31, 2014 1:51 pm
Forum: Automation, sensing and robotics
Topic: Actuator motor and board
Replies: 1
Views: 736

Actuator motor and board

We have a bunch of failed actuators at work (they were on heating valves and the temperature made the actuator casing brittle, snapping off the mounting) that I thought I might find a use for in a project. Any suggestions as to what I could use these for? essentially they are a very slow drive time ...
by BMS Doug
Sun Mar 30, 2014 5:02 pm
Forum: Beginners
Topic: IR Sensor help
Replies: 3
Views: 661

Re: IR Sensor help

Firstly, your Android phone won't have an ir transmitter so, no, you don't need an ir sensor for your pi. If you are using RaspBMC you can control your pi over Wi-Fi with an app such as Yatse on your phone. Otherwise, if you're using Raspbian, use remote desktop (e.g. xrdp). There are a few android...
by BMS Doug
Fri Mar 28, 2014 4:22 pm
Forum: Wanted
Topic: Colocation?
Replies: 13
Views: 8339

Re: Colocation?

We can offer Raspberry Pi servers - i.e. renting a Raspberry Pi and using it as a server, with full set of features - remote power control, automatic reinstalls (Raspbian, Pidora and Arch) and rescue mode. No colocation though, since we make some custom hardware modifications to the Raspberry Pi to...
by BMS Doug
Fri Mar 28, 2014 4:15 pm
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3562
Views: 126005

Re: Introduce yourself!

Hi, I'm Doug. I'm a BMS engineer (Building Management systems, or automated control of heating ventilation and air conditioning systems if you prefer). I'm English and I live and work in London. I'm still waiting for my first RPI to arrive (bit of a disaster story with that so far) but I already hav...
by BMS Doug
Fri Mar 28, 2014 2:29 pm
Forum: Beginners
Topic: Controlling AC unit with PI
Replies: 2
Views: 888

Re: Controlling AC unit with PI

Hi Makram, This should give you an idea of the scale of the issue: to create this you will need an IR emitter and a source for the IR codes your AC remote uses and a program to receive your input and look up the desired IR code and send it through the emitter (you can either search the web for the I...
by BMS Doug
Fri Mar 28, 2014 2:06 pm
Forum: Automation, sensing and robotics
Topic: Portable scanner for RaspBerry,
Replies: 2
Views: 2423

Re: Portable scanner for RaspBerry,

Hi Jo3ytjuh, I had a quick look into this for you, you may find that upgrading the DS-620 firmware (via a windows PC) will resolve the issues you are having with the device. There is official Linux support for this scanner, but it seems to require a firmware upgrade. This could definitely be better ...
by BMS Doug
Thu Mar 27, 2014 4:31 pm
Forum: Automation, sensing and robotics
Topic: Controlled Shutdown at Power Failure
Replies: 72
Views: 54973

Re: Controlled Shutdown at Power Failure

I wouldn't recommend this approach for an automotive system - you've got a large battery already as a backup power source. I think that there are other threads dealing with 12V automotive systems. Bud. but that's just it, in my car, the radio turns off as soon as the key is turned to the off positi...

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