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by IIVQ
Fri May 06, 2016 5:00 pm
Forum: Automation, sensing and robotics
Topic: GPIO picking up stray signals
Replies: 5
Views: 1140

Re: GPIO picking up stray signals

Basically I think the on-BCM pull down is so weak that it gets overwhelmed by the noise picked by your 40cm antenna (oops wire) I would do wire the button as: - Pi GND to one pin of the button - other pin to GPIO - pull GPIO up with a 5k resistor Would inverting the signal help in not picking up st...
by IIVQ
Fri May 06, 2016 3:16 pm
Forum: Automation, sensing and robotics
Topic: GPIO picking up stray signals
Replies: 5
Views: 1140

GPIO picking up stray signals

Hello, I want to sense a few remote things via GPIO. They theoretically work, but I'm picking up what I think is enfironmental EMP which causes random rising and falling edges. Can I filter those out? What I want to do is two things: * Detect a button press to gently shut down the Pi * Detect whethe...
by IIVQ
Sun Sep 08, 2013 8:49 pm
Forum: Networking and servers
Topic: Distribute hostnames: DNS or NIS?
Replies: 3
Views: 1594

Re: Distribute hostnames: DNS or NIS?

Unfortunately, a shortcut in my house (really bad cabling by the renovation company) fried my trusty Linksys 54bg with dd-wrt, where I could do (and did) such things. My current Fritz!box 7010 lacks those capabilities, and the custom firmwares for it lack the proper support for it's ATA's (telephone...
by IIVQ
Sun Sep 08, 2013 6:19 pm
Forum: Troubleshooting
Topic: Pi running "without power"
Replies: 5
Views: 883

Re: Pi running "without power"

I am not at all worried about it; in fact it comes in handy as I intend to power both the hub and the Pi from the same battery pack; this means one voltage regulator less.
by IIVQ
Sun Sep 08, 2013 5:44 pm
Forum: Networking and servers
Topic: Distribute hostnames: DNS or NIS?
Replies: 3
Views: 1594

Distribute hostnames: DNS or NIS?

Hi, I'm running a small home network with a router, 3 Raspberry Pi's, my linux box, windows laptop, android phone and the various devices of friends that come along. 2 of the Pi's (and the router) have a static IP address, the linux box has a semistatic one via DHCP and the others are dynamic (DHCP)...
by IIVQ
Sun Sep 08, 2013 5:33 pm
Forum: Troubleshooting
Topic: Pi running "without power"
Replies: 5
Views: 883

Pi running "without power"

I wanted to reboot my pi today, so I pulled out the power Micro USB plug ... and nothing happened. The power LED stays on. Checking on the monitor confirmed that it was happily running along! Apparently, the Pi can also be powered via the USB out, that's connected to a powered USB hub (although I th...
by IIVQ
Sun Sep 08, 2013 5:19 pm
Forum: Networking and servers
Topic: Bluetooth Networking: access Raspberry from Android
Replies: 3
Views: 3236

Re: Bluetooth Networking: access Raspberry from Android

Yeah sorry, my Desire Z with Android 2.3 doesn't have it :-)
by IIVQ
Fri Mar 29, 2013 1:54 pm
Forum: Networking and servers
Topic: Bluetooth Networking: access Raspberry from Android
Replies: 3
Views: 3236

Re: Bluetooth Networking: access Raspberry from Android

I found that stock Android doesn't have the PAN bluetooth profile, which means that I either need to try networking via DUN (which is really meant to work the other way around - the computer uses the phone to call) or root my android, both things I'm not gonna do today.
by IIVQ
Tue Mar 19, 2013 6:50 pm
Forum: Networking and servers
Topic: Bluetooth Networking: access Raspberry from Android
Replies: 3
Views: 3236

Bluetooth Networking: access Raspberry from Android

Hello, For several projects I would like to control a Raspberry Pi from a browser on an android device; a media player on our ship and a timelapse computer. Both applications are essentially battery powered, so I need a low-power connection solution; enter bluetooth. What I want is to be able to bro...
by IIVQ
Thu Mar 14, 2013 4:57 pm
Forum: Off topic discussion
Topic: Strange Power Consumption
Replies: 23
Views: 2353

Re: Strange Power Consumption

I have no idea whether this has anything to do with it, but it *might* be hints at a solution: - Most USB power supplies nowadays are not transformers, but Switched Mode Power Suplies (SMPS). These basically quickly switch on and off the 230/120V power supply to load or unload a capacitor; result is...
by IIVQ
Thu Mar 14, 2013 2:20 pm
Forum: Off topic discussion
Topic: Happy Pi Day!
Replies: 1
Views: 474

Happy Pi Day!

And, coincidentally, I got my order of 11 Raspberry PI's in today. Here they're shoing off their Pi-ness, enacting the "1415" while the cases form "3 dot". http://sphotos-b.ak.fbcdn.net/hphotos-ak-frc3/893059_10200914172442575_453103842_o.jpg So, what am I going to do with 11 Pi's you ask? Not much;...

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