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by drgeoff
Mon Nov 19, 2018 11:46 pm
Forum: General discussion
Topic: Raspberry PI NAS
Replies: 3
Views: 408

Re: Raspberry PI NAS

I wanted to have a redundant backup of all my home CCTV footage. I searched it up and the best and cheapest solution was a NAS using a raspberry pi. I would like to know whether a NAS running on raspberry pi can continuously store some videos on it. If yes, what minimum data rates would it require ...
by drgeoff
Mon Nov 19, 2018 9:30 pm
Forum: General discussion
Topic: How to add a fan if no gpio pins available
Replies: 5
Views: 457

Re: How to add a fan if no gpio pins available

When you have learned to solder, things like that will be trivial :) .
by drgeoff
Mon Nov 19, 2018 5:42 pm
Forum: General discussion
Topic: Disable wan0 by jumper?
Replies: 2
Views: 170

Re: Disable wan0 by jumper?

You can use either a jumper to ground or to +3.3. You need respectively a pull-up or pull-down, either internal or external resistor. Also it is preferable to have a resistor between the GPIO pin and the jumper for protection in the event of the GPIO somehow being set to output mode.
by drgeoff
Mon Nov 19, 2018 11:49 am
Forum: Beginners
Topic: SSH using Cellular Modem and Static Public IP
Replies: 7
Views: 361

Re: SSH using Cellular Modem and Static Public IP

Are you rebooting the RPi, or otherwise making it acquire the changed IP addresses, after enabling IPPT on the modem?
by drgeoff
Sun Nov 18, 2018 6:29 pm
Forum: Beginners
Topic: Powering a Raspberry Pi 3Model b+
Replies: 9
Views: 224

Re: Powering a Raspberry Pi 3Model b+

Hello There guys. Im going to cut things short. Is it possible to power the Pi with this? https://solarbotics.com/product/bholdaa-5cell-p/ The batteries will be re-chargable. I dont know how to solder, it would be a lot easier if i did. Could you please spare 5 mins of your time and gimme some answ...
by drgeoff
Sun Nov 18, 2018 8:26 am
Forum: Off topic discussion
Topic: WIP: A new learning Toy OS, for the RPi 3B.
Replies: 21
Views: 608

Re: WIP: A new learning Toy OS, for the RPi 3B.

W. H. Heydt wrote:
Sat Nov 17, 2018 11:59 pm
drgeoff wrote:
Sat Nov 17, 2018 10:35 pm
DavOS rolls off the tongue better. :)
Only if the programs that run under it are called Daleks.
No, the creator of the Daleks was Davros.
by drgeoff
Sat Nov 17, 2018 10:35 pm
Forum: Off topic discussion
Topic: WIP: A new learning Toy OS, for the RPi 3B.
Replies: 21
Views: 608

Re: WIP: A new learning Toy OS, for the RPi 3B.

DavOS rolls off the tongue better. :)
by drgeoff
Sat Nov 17, 2018 7:35 pm
Forum: General discussion
Topic: 3.3v pin not driving a LED
Replies: 3
Views: 136

Re: 3.3v pin not driving a LED

AnneRanch wrote:
Sat Nov 17, 2018 7:10 pm
It would help to know if you are connected to unregulated , unprotected +5v , as in Zero.
Unprotected yes but unregulated it should not be.
by drgeoff
Sat Nov 17, 2018 3:17 pm
Forum: Beginners
Topic: Help with basic project
Replies: 2
Views: 293

Re: Help with basic project

1. The official RPi camera has a special cable which plugs into the connector labelled "Camera" on the board. Or a USB camera plugs into a USB socket. 2. The 3.5 mm socket on all RPis except the Zero range has audio which can be connected to the "LINE IN" or "AUX IN" sockets on many stereo systems o...
by drgeoff
Sat Nov 17, 2018 1:09 pm
Forum: Troubleshooting
Topic: Raspberry Pi only showing black and white
Replies: 11
Views: 219

Re: Raspberry Pi only showing black and white

if the picture is stable and in the right place on the screen there is nothing wrong with the cable and another one won't give you colour. Are you sure you have selected composite mode on the TV? Some TVs use the same one phono socket for the composite video input and the Y input of the component in...
by drgeoff
Sat Nov 17, 2018 12:57 pm
Forum: General discussion
Topic: GPIO Sine waves
Replies: 4
Views: 136

Re: GPIO Sine waves

The stereo analogue audio outputs come from a pair of PWM GPIOs.

Audacity can generate sine waves. Feed those to the stereo out.
by drgeoff
Sat Nov 17, 2018 10:43 am
Forum: Other projects
Topic: I don't recommend the Adafruit case for 3A+
Replies: 0
Views: 170

I don't recommend the Adafruit case for 3A+

I have just taken delivery of a 3A+ and the two part case for same which says "Designed for Adafruit Industries by Mike Doel"l. It is real fight to get the 3A+ into the bottom half of the case. Get the HDMI side in first and then try to get the GPIO header side down into place.. However there is an ...
by drgeoff
Fri Nov 16, 2018 10:15 pm
Forum: Automation, sensing and robotics
Topic: MOSFET/transistor for 48V heater
Replies: 13
Views: 448

Re: MOSFET/transistor for 48V heater

Brandon92 wrote:
Fri Nov 16, 2018 9:26 pm
drgeoff wrote:
Fri Nov 16, 2018 9:19 pm
Brandon92 wrote:
Thu Nov 15, 2018 3:24 pm
the Vgs need to be highter that your maximum voltage.
Vds, not Vgs.
Your are correct. That was a typo. I will edit that.
It was incorrect in two places. You only fixed one.
by drgeoff
Fri Nov 16, 2018 9:19 pm
Forum: Automation, sensing and robotics
Topic: MOSFET/transistor for 48V heater
Replies: 13
Views: 448

Re: MOSFET/transistor for 48V heater

Brandon92 wrote:
Thu Nov 15, 2018 3:24 pm
the Vgs need to be highter that your maximum voltage.
Vds, not Vgs.
by drgeoff
Fri Nov 16, 2018 8:41 pm
Forum: General discussion
Topic: Zero DAC?
Replies: 7
Views: 228

Re: Zero DAC?

Yes, my mistake. I should have typed J11. Composite video comes out of the Broadcom SoC as an alternative to HDMI. One or the other. You cannot have both at the same time. With the default config.txt, if an HDMI display is not plugged in when the RPI boots the composite video output will be enabled....
by drgeoff
Fri Nov 16, 2018 8:02 pm
Forum: Troubleshooting
Topic: Lost connection to the Internet
Replies: 8
Views: 149

Re: Lost connection to the Internet

DarkPlatinum wrote:
Fri Nov 16, 2018 7:12 pm
Did you set your wifi country?
Didn't you see "It is connected to my home network via Ethernet" in the second line of the opening post?
by drgeoff
Fri Nov 16, 2018 7:56 pm
Forum: Beginners
Topic: Can't see RasPi via ethernet
Replies: 7
Views: 165

Re: Can't see RasPi via ethernet

I'm assuming you've enabled the Pi's SSH server, else this won't work. That is the OP's problem. He hasn't. He wrote "Nor can I add ‘ssh’ file .." I don't use NOOBS so am not going to write something which I haven't tried myself. Can someone else come to the rescue with how to enable ssh on a NOOBS...
by drgeoff
Fri Nov 16, 2018 7:47 pm
Forum: Troubleshooting
Topic: RPIZW - Wifi Chip.
Replies: 29
Views: 424

Re: RPIZW - Wifi Chip.

Those f:\ssh.txt and f:\wpa_supplicant.conf lines arise from the unwarranted assumption that your micro-SD card appears as drive F in your Windows box. If it appears as another drive letter, use that letter instead.
by drgeoff
Fri Nov 16, 2018 4:48 pm
Forum: General discussion
Topic: Zero DAC?
Replies: 7
Views: 228

Re: Zero DAC?

That J1 is the composite video output. Exactly the same signal as on every other model of RPi released to date. What more do you need to know that Mr Google won't tell you?
by drgeoff
Fri Nov 16, 2018 4:35 pm
Forum: General discussion
Topic: Acoustic Echo cancellation for Raspberry Pi
Replies: 3
Views: 147

Re: Acoustic Echo cancellation for Raspberry Pi

Our objective is to achieve full duplex voice communication without accoustic echo between smartphone (Linphone application) and simple IP intercom, based on raspberry through voip technology, but our problem is I can hear back my own voice on my phone which picked up from the speaker of raspberry....
by drgeoff
Fri Nov 16, 2018 4:18 pm
Forum: General discussion
Topic: Compiling Asterisk 1.8
Replies: 2
Views: 65

Re: Compiling Asterisk 1.8

I have portable asterisk for x86 OS, that asterisk running in any version of x86 Linux system & that asterisk I was try to run on my Raspberry Pi I am getting error cannot run binary code something like that, then I realized this error because of my Raspberry OS is 64-bits then I try to install Qum...
by drgeoff
Fri Nov 16, 2018 2:26 pm
Forum: Beginners
Topic: Installing homebridge and connect camera to homebridge/homekit
Replies: 2
Views: 78

Re: Installing homebridge and connect camera to homebridge/homekit

1. Linux has a 'find' command. Learn how to use it.

2. Learn to use the 'man' command to read documentation.

3. ssh is disabled by default in Raspbian. One of the options in the 'raspi-config' program can enable it.
by drgeoff
Wed Nov 14, 2018 9:48 pm
Forum: Beginners
Topic: Am I in the right place?
Replies: 13
Views: 369

Re: Am I in the right place?

YanKleber wrote:
Wed Nov 14, 2018 9:14 pm
I still didn't give up. Question - so can I go easily with something less than the Pi 3?
Yes, a cheap portable MP3 player and an audio cable between it and your stereo system.
by drgeoff
Wed Nov 14, 2018 3:14 pm
Forum: General discussion
Topic: Acoustic Echo cancellation for Raspberry Pi
Replies: 3
Views: 147

Re: Acoustic Echo cancellation for Raspberry Pi

Your problem is not specific to RPis. You need to do your own searching about echo cancellation and then figure out how to code a suitable algorithm to run on the RPi. You mention "reflection". If you mean from the environment (ie the table, walls, ceiling, nearby objects etc) then that will be vari...

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