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by Octradox
Wed Jun 05, 2019 7:07 pm
Forum: Other projects
Topic: Rpi 4g phone call?
Replies: 4
Views: 574

Rpi 4g phone call?

Hi all

Is there an available rpi module that can make phone calls on the 4g network?

I've seen many that can use 4g internet but haven't found any that can send and recieve sms or phone calls?

Thanks!
by Octradox
Mon Feb 12, 2018 2:11 pm
Forum: Automation, sensing and robotics
Topic: Detect heat of stovetop?
Replies: 9
Views: 915

Re: Detect heat of stovetop?

I sense you are going for very very cheap here. ... NB Electricity and heat are dangerous (and food hygiene matters)! Non-contact seems a better bet to me. Not very very cheap, but I dont want to spend $100 on a single component (thermal camera). If the whole project costs roughly $50- $70 aud I'm ...
by Octradox
Mon Feb 12, 2018 12:52 pm
Forum: Automation, sensing and robotics
Topic: Detect heat of stovetop?
Replies: 9
Views: 915

Re: Detect heat of stovetop?

I've seen non-contact thermometers mounted above a hob before. If I remember correctly the person had used I sensor per 'hob plate' and had some form of LCD display showing the temperature of each object. Could probably be adapted to send data over a wireless protocol. Ooo, I'd be interested in doi...
by Octradox
Mon Feb 12, 2018 12:47 pm
Forum: Automation, sensing and robotics
Topic: Detect heat of stovetop?
Replies: 9
Views: 915

Re: Detect heat of stovetop?

There are various ways to measure temperature without the sensing device getting hot. A thermal camera https://learn.adafruit.com/adafruit-amg8833-8x8-thermal-camera-sensor/raspberry-pi-thermal-camera An Infrared Thermometer https://www.amazon.co.uk/Thermometer-Tacklife-58℉-716℉-Temperature-Conserv...
by Octradox
Mon Feb 12, 2018 9:29 am
Forum: Automation, sensing and robotics
Topic: Detect heat of stovetop?
Replies: 9
Views: 915

Detect heat of stovetop?

So this is probably a pipe dream due to temperature and stuff but I thought I'd ask in case there are components that can do this or if someone can thing of a creative solution So basically I'm building kinda like a hud helmet. Guess you could say AR, but its not really augmenting reality but instea...
by Octradox
Sun Dec 31, 2017 11:27 pm
Forum: Networking and servers
Topic: Slow pi boot time to fit into network?
Replies: 2
Views: 419

Re: Slow pi boot time to fit into network?

Thanks for your help, ill do the rc local thing.

Also this setup is on a vehicle, so the less pieces on it (no router) the better + when the vehicle is off it obviously cannot power the pi's.
by Octradox
Sun Dec 31, 2017 8:56 am
Forum: Networking and servers
Topic: Slow pi boot time to fit into network?
Replies: 2
Views: 419

Slow pi boot time to fit into network?

So in my scenario, i have 36 pi's that need to connect to a 37th pi thats acting as a wireless hotspot type deal. Heres the issue, they all turn on at the same time, so im having issues with them automatically connecting. Can I slow down the boot times of the 36 pi's so that the 37th pi is up and ru...
by Octradox
Sun Dec 31, 2017 6:38 am
Forum: Troubleshooting
Topic: VNC need to reset username and password
Replies: 1
Views: 5203

Re: VNC need to reset username and password

Ok i worked it out. Yay me.

In terminal:
Hostname
(You get your hostname)

Now for password, all my attempts werent actually rewriting my password.

In terminal:
sudo mount -o remount,rw /
sudo chmod 640 /etc/shadow
sudo passwd (then whatever you got for hostname)

Boom. Reset your password.
by Octradox
Sun Dec 31, 2017 6:18 am
Forum: Troubleshooting
Topic: VNC need to reset username and password
Replies: 1
Views: 5203

VNC need to reset username and password

Hi, so I need to reset my username and password for vnc. Ive searched everywhere and i think you can reset the vnc password using vncpasswd. However that only comes up with options, and not really how to do it... I also have no idea how to check what my username i for vnc and I've done multiple meth...
by Octradox
Thu Nov 02, 2017 6:25 am
Forum: Other projects
Topic: Powering a pi zero + screen using motherboard pins
Replies: 0
Views: 408

Powering a pi zero + screen using motherboard pins

Hi everyone. You know those cool holograms that you can get on your phone if you put a certain video on it with a pyramid of glass thing? If I'm talking gibberish to you, here's a link of what it is. http://www.telegraph.co.uk/technology/mobile-phones/11780393/How-to-turn-your-phone-into-a-3D-hologr...
by Octradox
Tue Jun 27, 2017 12:43 pm
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

I have a Pi security camera at the end of 20+m of cat 5 DIY PoE setup. 12Vin and a $2 12volt to 5V USB cigarette adapter, ripped open for the circuit. Been working for years. Only a 12m boom, thicker cable would be used and half the Pi's are only 6m away. Pay a bit more and I would use TO-220 Volta...
by Octradox
Tue Jun 27, 2017 5:49 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

Anyway. Thanks for all the advice guys, I'll put a simple buck down on each Pi I think. Shutdown isn't needed as I have a button on the controller for it (and also if it loses connection it'll shutdown). Price is pretty fine, I did calculations and reckon I can do it for 10- 15k which is cheap for w...
by Octradox
Tue Jun 27, 2017 5:43 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

Imperf3kt wrote:To be perfectly honest, I think a simpler solution might just be to invest in one of those wireless CCTV systems. I know they can do multiple cameras, but I don't know about 24!.
That won't be able to do enough image analysis at fast enough rates. Plus I need IO to drive solenoids.
by Octradox
Tue Jun 27, 2017 4:48 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

You can do it like that, sure, but I imagine you'd need multiple buck converters. DC doesn't travel very far. 12M even, will be too far. Can't I just have a big wire to minimise resistance? I calculated the load with copper wire @2A, 12M and 5v to be possible with 10AWG wire. Thats one massive wire...
by Octradox
Tue Jun 27, 2017 3:26 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

Imperf3kt wrote:You can do it like that, sure, but I imagine you'd need multiple buck converters. DC doesn't travel very far. 12M even, will be too far.
Can't I just have a big wire to minimise resistance?
by Octradox
Tue Jun 27, 2017 2:21 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

End goal is to put them on a spray rig. One camera per metre on a 24m boom. The 25Th pi is just a touch screen controller for settings. Pay due consideration to location of the dc-dc converters and the wiring to the RPis. For example, if the 5 volt supply is at the other end of the boom from a RPi,...
by Octradox
Mon Jun 26, 2017 6:03 pm
Forum: Wanted
Topic: Compute module mobo's
Replies: 3
Views: 6273

Re: Compute module mobo's

A list of CM mobo's /carrier boards would be handy, so here goes: - default rpi carrier board - COMPUTE MODULE IO BOARD V3 https://www.raspberrypi.org/products/compute-module-io-board-v3/ - WD Media stick http://wdlabs.wd.com/products/media-stick/ - WD sata to pi http://wdlabs.wd.com/products/sata-...
by Octradox
Mon Jun 26, 2017 5:51 pm
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

Octradox, Yes, a DC-DC converter is what is needed here. Some numbers for you.. - A Pi 3 with camera recording and all CPU cores going full bore will take about 1.0 amp or so, say 1.2 amp to be safe. I am assuming you don't have any other large power draws on the Pi, high draw USB devices for examp...
by Octradox
Mon Jun 26, 2017 5:48 pm
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

Ok, so it'll output 12 volt, do I just need to get it down to 5 volt with a buck down and it'll be fine? Unfortunately it will not be 12v, it will be whatever the battery voltage is when engine is not running, rising to 13.8v when the engine starts with a fully charged battery, or 14.4 (or above) i...
by Octradox
Sat Jun 24, 2017 3:46 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Re: Running multiple pi's on a tractor

You will need about 65 amps of 5 volt to run all those. DC-DC power supplies would be your best bet. That will depend on the maximum voltage/current output of the tractor's generator/alternator. Ok, so it'll output 12 volt, do I just need to get it down to 5 volt with a buck down and it'll be fine?
by Octradox
Fri Jun 23, 2017 6:05 pm
Forum: Wanted
Topic: Compute module mobo's
Replies: 3
Views: 6273

Compute module mobo's

There doesn't seem to be a wide range of mobo's available to purchase online... But is there any cm3 mobo's with dual CSI cameras and integrated WiFi? Bonus points for if it also has relays attached but if not that's ok (GPIO pins needed) If not... Where would be the best place to have one made? Che...
by Octradox
Fri Jun 23, 2017 6:01 pm
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5005

Running multiple pi's on a tractor

So basically I want to run about 25 raspberry pi 3's on my tractor to monitor some stuff using the camera. Electricity-wise, I'm concerned about the different voltages that may come out of the tractor at different revs. What would be the most suitable way to overcome this issue? I was thinking like ...

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