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by Nav9
Sat May 08, 2021 9:53 am
Forum: For sale
Topic: RPi 3B. Bangalore, India
Replies: 0
Views: 1384

RPi 3B. Bangalore, India

Hi. I'd like to sell my Raspberry Pi. Anyone in Bangalore is welcome to get in touch. I don't think it'd be practical to ship it anywhere else in India. Lockdown is in effect, so meeting after the lockdown is also ok, but do mention your intent to purchase as early as you can. Original Raspberry Pi ...
by Nav9
Sun Oct 25, 2020 12:22 pm
Forum: Off topic discussion
Topic: Plug pin size: power adapters in India
Replies: 11
Views: 1319

Re: Plug pin size: power adapters in India

@Burngate's mention of shaver plug reminded me...I have a Panasonic trimmer that also has thin plug pins, but it fits into the socket just ok. Turns out, one pin is bent inward as visible in the image (the one on the left). I didn't bend it. It was like that when purchased. Anyway, the better soluti...
by Nav9
Sat Oct 24, 2020 10:26 pm
Forum: Beginners
Topic: Necessary components to be bought with Raspberry Pi
Replies: 10
Views: 846

Re: Necessary components to be bought with Raspberry Pi

Well, many times it's not about knowing how to search the web. I had to purchase something else urgently, so the decision to buy RPi was coupled with that. My natural search term was "Raspberry Pi tutorial", to get to know what it is like. I normally do a lot more research than this, befor...
by Nav9
Sat Oct 24, 2020 5:04 pm
Forum: Beginners
Topic: Necessary components to be bought with Raspberry Pi
Replies: 10
Views: 846

Re: Necessary components to be bought with Raspberry Pi

Great necro and you can use your laptop as a “monitor” by installing VNCviewer on it and enabling VNCserver on the pi. Nice to know. I think it'd help if the official tutorial pages led to a page where such "what to buy" tips and precautions were mentioned with the reason. I initially pur...
by Nav9
Sat Oct 24, 2020 8:54 am
Forum: Off topic discussion
Topic: Plug pin size: power adapters in India
Replies: 11
Views: 1319

Re: Plug pin size: power adapters in India

I was given this adapter for my Raspberry Pi 3B (and it's working fine). Well, if it's meant for Europe, then I wonder why it's ending up in India. I went to SP Road Bangalore to purchase it. The fact that they first sold me that ERD smartphone charger and on my second visit when I insisted on the o...
by Nav9
Sat Oct 24, 2020 8:49 am
Forum: Off topic discussion
Topic: Safe shutdown
Replies: 31
Views: 3532

Re: Safe shutdown

Wow! I'd choose microdrive over a microSD anyday.
by Nav9
Fri Oct 23, 2020 3:04 pm
Forum: Off topic discussion
Topic: Plug pin size: power adapters in India
Replies: 11
Views: 1319

Plug pin size: power adapters in India

Hi. I checked the forum, and nobody seems to have reported this yet, so here goes: The plug pins of the original RPi power adapter are a bit too thin for the plug sockets in India. When I first plugged in my RPi and it didn't turn on, I thought the adapter was defective. Then I realized it was too l...
by Nav9
Fri Oct 23, 2020 2:53 pm
Forum: General discussion
Topic: Buying Raspberry Pi in India
Replies: 68
Views: 67544

Re: Buying Raspberry Pi in India

RPi can be purchased from any authorized reseller in India. They already made the list available here: https://www.raspberrypi.org/products/raspberry-pi-universal-power-supply/?resellerType=home CAUTION: DO NOT buy the local power adapters they try to sell you. Buy only the original RPi adapter, els...
by Nav9
Fri Oct 23, 2020 2:47 pm
Forum: Beginners
Topic: Necessary components to be bought with Raspberry Pi
Replies: 10
Views: 846

Re: Necessary components to be bought with Raspberry Pi

I know this is a very old thread, but I'm answering this since I wish somebody had told me a lot of things. I'd have avoided a lot of time and money being wasted. What you need to buy: The RPi board. A USB keyboard and mouse if you don't already have one (any local brand will do). A computer monitor...
by Nav9
Fri Oct 23, 2020 2:23 pm
Forum: Off topic discussion
Topic: Safe shutdown
Replies: 31
Views: 3532

Re: Safe shutdown

Ok, so no solution within reach then...I appreciate the replies. Hope somebody gets a Tony-Stark-in-the-cave type of an idea eventually, to have safe power off's.
by Nav9
Fri Oct 23, 2020 8:35 am
Forum: Off topic discussion
Topic: Safe shutdown
Replies: 31
Views: 3532

Re: Safe shutdown

Nice to know about journalling filesystems. I see there's a lot of other writes that happen, which makes one wish for the invention of a tiny 16GB magnetic disk that could replace the microSD card slot.
by Nav9
Fri Oct 23, 2020 4:34 am
Forum: Off topic discussion
Topic: Safe shutdown
Replies: 31
Views: 3532

Re: Safe shutdown

Just for the sake of brainstorming (I know it's a dumb suggestion): If at the kernel level, the write operations are changed to being something like how database transactions are performed, then when a write operation is incomplete during power failure, when RPi OS is re-started, the write operation...
by Nav9
Fri Oct 23, 2020 4:22 am
Forum: Beginners
Topic: Need a blue light filter to be on continuously (Redshift?)
Replies: 10
Views: 2515

Re: Need a blue light filter to be on continuously (Redshift?)

I don't think there's any need to use Redshift. Even in the year 2000, CRT monitors and even today's monitors have a "warm" setting that reduces blue light. Just use that. Although Redshift got installed on my RPi OS, I got errors like "Gamma ramp size too small: 0" and "Fai...
by Nav9
Wed Oct 14, 2020 7:02 am
Forum: Off topic discussion
Topic: Safe shutdown
Replies: 31
Views: 3532

Safe shutdown

Hi. Just wondering if in future models, whether it would be possible to include logic and capacitors on the board to detect when there is a power failure (which might result in microSD corruption due to loss of power while writing to the microSD), it could give the board just enough energy to interr...
by Nav9
Sun Oct 11, 2020 11:37 am
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

On connecting a 2.1W USB speaker with a 3.5mm jack to my RPi, I couldn't get any sound to play. Surprisingly, omxplayer -o local xxx.mp3 worked. But audio wasn't playing with VLC or Audacious or Youtube. Audacity is able to record inputs from a USB microphone, but is unable to play the audio. But wh...
by Nav9
Wed Sep 30, 2020 11:42 am
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

For posterity: From what I've tried until now, a USB microphone with sensitivity -67dBV/pBar, -47dBV/Pascal (these were mentioned on the back-cover of the microphone packaging) is good enough to just be able to detect human voices. It does get overrun with background noise, but as long as the noise ...
by Nav9
Tue Sep 29, 2020 8:53 pm
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

So I formatted the SD card with Fat32, used Etcher to write Raspbian onto the SD card and it's booting! While it boots it shows a yellow lightning icon, which I realized is the icon indicating a less than 5V power supply. The authorized reseller gave me a cheap 2.4A smartphone power adapter instead ...
by Nav9
Mon Sep 28, 2020 6:45 pm
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

I'm planning to buy a mic and speaker tomorrow or the day after. Need help deciding the right wattage for the speaker.
by Nav9
Mon Sep 14, 2020 4:00 pm
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

Thank you emxsys. Meanwhile, I called up a friend who knows some electronics. He told me I'd have to look at the wattage of the peripherals. For example, my speakers require 6W because they have amplifiers, so since Watt = Amp * Volt, 6W != 500mA * 5V, I won't be able to connect my speaker to the Ra...
by Nav9
Thu Sep 10, 2020 11:06 am
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

the only part that I see fitting the project is "a legal action" :mrgreen: Well, legal action may be possible in your country. Here the dynamics are different. Houses are closely packed, officials are corrupt, neighbours don't realize or don't care about the noise they make...and the poli...
by Nav9
Wed Sep 09, 2020 11:33 pm
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Re: Plugging in parts for a noise drowning project

@emxsys: thank you, but my question was more toward asking if Raspberry pi is simple enough that even with less experience, I could just buy a mic, speaker and plug it to the board via the USB ports and be good to go? I don't need any hardware-specific noise cancellation or thresholding. All that lo...
by Nav9
Sat Sep 05, 2020 6:28 pm
Forum: Beginners
Topic: Plugging in parts for a noise drowning project
Replies: 18
Views: 870

Plugging in parts for a noise drowning project

Intro: Hello. I'm a software programmer with good experience in Python, Linux and machine learning. Although I've learnt the basics of electronics in school and engineering college, I've never even used a breadboard. I did see a post here about a software guy asking how to get started and I followe...

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