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by drgeoff
Fri Feb 15, 2019 8:58 am
Forum: Off topic discussion
Topic: Is ARM doomed?
Replies: 10
Views: 273

Re: Is ARM doomed?

jahboater wrote:
Fri Feb 15, 2019 8:55 am
ARM once stood for Advanced Risc Machine.
Originally, Acorn RISC Machine
by drgeoff
Thu Feb 14, 2019 11:05 pm
Forum: Networking and servers
Topic: Indoor positioning system using Rpi as AP
Replies: 2
Views: 68

Re: Indoor positioning system using Rpi as AP

You haven't said what sort of accuracy you require and what area you need to cover. Wi-Fi signal strength within a building is affected by other factors in addition to distance so triangulation based on relative signal strength is not entirely reliable. And even if you had a very directional antenna...
by drgeoff
Thu Feb 14, 2019 4:45 pm
Forum: HATs and other add-ons
Topic: Sense Hat - Compass accuracy - Am I expecting too much?
Replies: 3
Views: 72

Re: Sense Hat - Compass accuracy - Am I expecting too much?

Other metallic objects near the compass?

And don't overlook that any wire carrying a current produces a magnetic field.
by drgeoff
Thu Feb 14, 2019 9:00 am
Forum: Beginners
Topic: How to install the OS on Raspberry Pi 3 Model B+
Replies: 28
Views: 439

Re: How to install the OS on Raspberry Pi 3 Model B+

LukeJuror wrote:
Wed Feb 13, 2019 11:20 pm
I know I could read docs or follow guides but it's to diffuse and i dont' have time.
But you had time to post and wait for a reply!
by drgeoff
Wed Feb 13, 2019 4:00 pm
Forum: General discussion
Topic: Windows 10
Replies: 8
Views: 318

Re: Windows 10

Tom's HW has a post "You Can Now Run Windows 10 on the Raspberry Pi 3". OK. I don't know why you would want to but whatever... :roll: Win 10 on RPi has already discussed in multiple posts in the locked thread https://www.raspberrypi.org/forums/viewtopic.php?f=62&t=233499. This one deserves the same...
by drgeoff
Tue Feb 12, 2019 8:45 am
Forum: General discussion
Topic: Relay Protection of Power Systems with Raspberry PI
Replies: 5
Views: 170

Re: Relay Protection of Power Systems with Raspberry PI

Not clear why you would need any of 50 kHz sampling, FFT or a neural network.
by drgeoff
Sun Feb 10, 2019 12:02 am
Forum: Beginners
Topic: Does GPIO out set to LOW act as ground
Replies: 1
Views: 51

Re: Does GPIO out set to LOW act as ground

A GPIO output set to LOW acts a a "weak ground" just as a GPIO output set to HIGH acts as a "weak 3.3 volts". Weak meaning "can sink/source a small current", not as much as a "real" ground or 3.3 volts. So, yes if you connect a LED (plus series resistor) between a GPIO output set HIGH and another GP...
by drgeoff
Sat Feb 09, 2019 7:05 pm
Forum: Advanced users
Topic: How to get an thernet connection between pi zero and pi3 over usb
Replies: 6
Views: 143

Re: How to get an thernet connection between pi zero and pi3 over usb

Being pedantic, you cannot get an ethernet connection over USB. You can get an IP connection over USB.
by drgeoff
Sat Feb 09, 2019 6:58 pm
Forum: Beginners
Topic: RasPBX- How to?
Replies: 15
Views: 222

Re: RasPBX- How to?

Looks like the Gigaset is in principle doing what it should and the VoIP server is not honoring the redirect. https://andrewjprokop.wordpress.com/2013/07/18/move-it-on-over-sip-redirection/ https://tools.ietf.org/html/rfc5806 https://www.tech-invite.com/fo-sip/pdf/Ti-SIP-3665-3.6.pdf But perhaps the...
by drgeoff
Sat Feb 09, 2019 8:36 am
Forum: Beginners
Topic: USB D+ D- on Pi 3 B+
Replies: 9
Views: 207

Re: USB D+ D- on Pi 3 B+

On all models of RPi the micro-USB power input socket is just that. The other pins are not connected to anything.
by drgeoff
Fri Feb 08, 2019 11:59 pm
Forum: Beginners
Topic: power with 3B+ PoE
Replies: 7
Views: 146

Re: power with PoE

There is no mini-USB on any RPi.
by drgeoff
Fri Feb 08, 2019 11:53 pm
Forum: Beginners
Topic: USB D+ D- on Pi 3 B+
Replies: 9
Views: 207

Re: USB D+ D- on Pi 3 B+

rpdom wrote:
Fri Feb 08, 2019 11:10 pm
I'm assuming you mean on the PP test points on the PCB, not the GPIO pins.
But even if they are on PP test points what would be the benefit of soldering to those over soldering to the pads of the PCB where the USB socket pins are?

(And yes, the USB D+ and D- are not on GPIO pins.)
by drgeoff
Fri Feb 08, 2019 4:40 pm
Forum: General discussion
Topic: Is Raspberry Pi capable of replacing 2 wire thermostat
Replies: 7
Views: 260

Re: Is Raspberry Pi capable of replacing 2 wire thermostat

Possibly but be aware that the RPi + relay will need power. That makes a drop-in replacement on the existing two wires more "challenging".
by drgeoff
Fri Feb 08, 2019 4:31 pm
Forum: Beginners
Topic: power with 3B+ PoE
Replies: 7
Views: 146

Re: power with PoE

reduhl wrote:
Fri Feb 08, 2019 3:57 pm
Can you power a Raspberry Pi with the usual power source with a PoE board installed or will it cause problems to have a PoE and not use it?
This was a 4 year old thread. Long before the RaspberryPi 3B+ and the suitable RaspberryPi PoE HAT existed. Are you asking about that combination?
by drgeoff
Thu Feb 07, 2019 6:55 pm
Forum: Beginners
Topic: RasPBX- How to?
Replies: 15
Views: 222

Re: RasPBX- How to?

"Did you use the Web Configurator to make the call to your mobile use the second VoIP account?" Jepp, you can choose any of the two VOIP accounts for outgoing calls, or choose on case-by-case. I tried all three options. "Did you call your mobile and check what phone number it showed the call was co...
by drgeoff
Thu Feb 07, 2019 6:01 pm
Forum: Beginners
Topic: RasPBX- How to?
Replies: 15
Views: 222

Re: RasPBX- How to?

"Consider getting an additional VoIP account from a different ITSP. Configure your C430A GO to use that account when calling your mobile number. Then try the Call Diversion of the C430A GO." Have tried that. Doesn't work. Did you use the Web Configurator to make the call to your mobile use the seco...
by drgeoff
Thu Feb 07, 2019 5:39 pm
Forum: Beginners
Topic: Increasing USB current on Pi 3B+
Replies: 17
Views: 348

Re: Increasing USB current on Pi 3B+

Tomcat2 wrote:
Thu Feb 07, 2019 11:44 am
Is it possible to disconnect the USB sockets' +5V pins and wire them direct to the power supply perhaps?
Yes
by drgeoff
Thu Feb 07, 2019 5:34 pm
Forum: Beginners
Topic: RasPBX- How to?
Replies: 15
Views: 222

Re: RasPBX- How to?

Are you certain that your telephone service provider does not have Call Diversion? That is done in the telephone network before the call is sent over analogue or VoIP. Usually it can be configured by dialling certain key sequences. For example BT in the UK, *21*(phone number you want to divert to)# ...
by drgeoff
Thu Feb 07, 2019 5:00 pm
Forum: Beginners
Topic: RasPBX- How to?
Replies: 15
Views: 222

Re: RasPBX- How to?

There is no English manual for the C430A GO. It may be similar to the 580A GO. https://gse.gigaset.com/fileadmin/gigas ... _IE-UK.pdf page 34 has information about Call Divert.
by drgeoff
Thu Feb 07, 2019 4:11 pm
Forum: Beginners
Topic: RasPBX- How to?
Replies: 15
Views: 222

Re: RasPBX- How to?

Asterisk/FreePBX is not a 10 minute learning exercise. :( What VoIP provider are you currently using? Some have their own forwarding option which obviates the need for your own PBX and its configuration. Another way to avoid any need for your own PBX is if you have a smart phone on which you can ins...
by drgeoff
Mon Feb 04, 2019 1:11 pm
Forum: Automation, sensing and robotics
Topic: Seeking guidance with powering motors
Replies: 19
Views: 447

Re: Seeking guidance with powering motors

I'm looking to create something that requires a fair amount of torque so I rigged up a simple BC337 transistor connected to pin 12 with a 1k Ohm resistor which I used to switch a 4.5v motor on and off with a capacitor across it. While this worked, it was not strong enough to do much other than powe...
by drgeoff
Mon Feb 04, 2019 8:53 am
Forum: Automation, sensing and robotics
Topic: Seeking guidance with powering motors
Replies: 19
Views: 447

Re: Seeking guidance with powering motors

As drawn, the motors will not turn on until the diode (which is the wrong way round) burns out.
by drgeoff
Mon Feb 04, 2019 8:44 am
Forum: Troubleshooting
Topic: Negative power?
Replies: 5
Views: 174

Re: Negative power?

No. Software cannot do that. RPi hardware cannot do that.

Most likely cause is that you swapped your meter leads over.
by drgeoff
Sat Feb 02, 2019 6:39 pm
Forum: Troubleshooting
Topic: Philips LCD TFT Composite CVBS Display
Replies: 13
Views: 426

Re: Philips LCD TFT Composite CVBS Display

ohten wrote:
Fri Feb 01, 2019 9:18 pm
Yes, I am using a cable that works with the display. It does match the one pictured in the diagram.
Your photo is proof that the cable does NOT electrically match any of the ones that are suitable for use with the TRRS socket on a RPi.

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