Go to advanced search

by malini
Thu Apr 14, 2016 10:10 am
Forum: Automation, sensing and robotics
Topic: smoke sensor
Replies: 0
Views: 342

smoke sensor

Hi! I'm using a mq2 smoke sensor in my home automation project. I have connected the DO pin of the sensor to the Pi and not used the AO pin as i didnt want to use the adc converter. Now how do i set the range for the smoke in the code? I had set it as 0.9 but that was just a random value. Please hel...
by malini
Tue Apr 12, 2016 4:37 am
Forum: Automation, sensing and robotics
Topic: any feedback mechanism for relay control?
Replies: 1
Views: 441

any feedback mechanism for relay control?

Hi! I'm working on a home automation system. I have used a relay to control the lights from anywhere. But my project guide posed me with a question to which i didnt know the answer. If we are outside somewhere and are switching on the lights, is there any mechanism to find out if the lights have act...
by malini
Tue Apr 12, 2016 4:29 am
Forum: Automation, sensing and robotics
Topic: sensor to detect only human presence
Replies: 5
Views: 3258

sensor to detect only human presence

Hi!

I'm working on a security system where an alarm goes off on detecting any intruder movement. I'm using a PIR sensor but that also detects animal movement along with human movement. Is there any sensor which detects only human presence and movement?

Thanks
by malini
Sat Mar 19, 2016 9:41 am
Forum: Troubleshooting
Topic: confusion regarding ngrok
Replies: 1
Views: 506

confusion regarding ngrok

Hi So i've controlled a relay connected to my Pi from anywhere on a local network (I'm using putty and VNC viewer). Now i wish to control it from anywhere in the world. I downloaded ngrok on my Pi and ran it, and it's showing its tunnel status as online (this means it's working right?) I used the co...
by malini
Wed Mar 09, 2016 4:14 am
Forum: Automation, sensing and robotics
Topic: controlling a relay from anywhere
Replies: 0
Views: 486

controlling a relay from anywhere

Hi I'm trying to control a relay from a web browser. I have followed the given tutorial https://www.openhomeautomation.net/control-a-relay-from-anywhere-using-the-raspberry-pi/ The relay is connected to a cloud server here. When i type the ip address of the Pi in the browser and control it. that wor...
by malini
Tue Mar 08, 2016 9:14 am
Forum: Troubleshooting
Topic: problem restarting apache
Replies: 3
Views: 942

Re: problem restarting apache

oh sorry! it was a typing mistake. I meant sudo service apache2 restart
by malini
Mon Mar 07, 2016 12:17 pm
Forum: Troubleshooting
Topic: problem restarting apache
Replies: 3
Views: 942

problem restarting apache

I installed apache2 on my Pi (I'm using Pi 2 model B). It worked the first time. But now when i try to restart it, it doesnt seem to restart. The command sudo service apache2 restart doesnt seem to work at all. So I give the command " sudo /etc/init.d/apache2 restart" and i get the following - [ok] ...
by malini
Sat Feb 27, 2016 11:11 am
Forum: Troubleshooting
Topic: problem in setting up static ip address
Replies: 3
Views: 637

problem in setting up static ip address

Hi I connect my Pi via SSH. Everytime i use a dynamic ip address assigned. I wanted to change to a static one and followed the instructions online. But when i run the command cat /etc/network/interfaces , i don't get the iface eth0 inet dhcp . Why? I get something like this. How to change my Pi's ad...
by malini
Sat Feb 20, 2016 9:11 am
Forum: General discussion
Topic: relay - opposite functioning
Replies: 4
Views: 664

Re: relay - opposite functioning

Oh. Yes, i guess the board indeed is active low. It didn't strike me.
Thanks a lot! :)
by malini
Fri Feb 19, 2016 10:58 am
Forum: General discussion
Topic: relay - opposite functioning
Replies: 4
Views: 664

relay - opposite functioning

Hi! I'm controlling a led using raspberry pi from a relay board. It is interfaced with a photo sensor program wherein the led has to light up when it is dark and vice versa. But when i'm connecting with the relay and giving suppose GPIO.LOW , it's doing the opposite i.e the led is lighting up. Why? ...
by malini
Mon Feb 15, 2016 7:15 am
Forum: Automation, sensing and robotics
Topic: automation - light control
Replies: 8
Views: 1213

Re: automation - light control

the relay is just clicking but the led isn't lighting up! And sometimes when i terminate the program, the relay still keeps clicking. Why so? can someone please help?
by malini
Sat Feb 13, 2016 10:17 am
Forum: Automation, sensing and robotics
Topic: automation - light control
Replies: 8
Views: 1213

Re: automation - light control

and yes.. I am using a resistor with the led.
by malini
Sat Feb 13, 2016 10:15 am
Forum: Automation, sensing and robotics
Topic: automation - light control
Replies: 8
Views: 1213

Re: automation - light control

https://www.google.co.in/search?q=8+cha ... auDqY6M%3A

this is the link.
I guess the diode and everything is built in right?
by malini
Fri Feb 12, 2016 5:02 am
Forum: Automation, sensing and robotics
Topic: automation - light control
Replies: 8
Views: 1213

automation - light control

Hi! I'm trying to control an LED(5 mm LED) from the relay using raspberry pi 2 board. I have an 8 channel 5V relay. I also have a 9V dc battery for the LED. I'm a little confused with the connections regarding the relay because i don't want to damage my Pi. :( So one side of the relay will be the ra...

Go to advanced search