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by drgeoff
Sat Jun 23, 2018 8:35 pm
Forum: Advanced users
Topic: All the ports are closed
Replies: 2
Views: 38

Re: All the ports are closed

The port(s) need to be open in the device that the router is forwarding them to. If not, the tool will report them as closed.
by drgeoff
Sat Jun 23, 2018 8:15 pm
Forum: General discussion
Topic: 2.4ghz rc receivers
Replies: 5
Views: 220

Re: 2.4ghz rc receivers

And yes, wifi has become to mean house wide wireless internet, 2.4ghz is used is many different ways. But at the end of the day you have a transmitter and a receiver and code running at both ends, you only have to understand the signal and be able to pick it up. I'm not clear what point you are try...
by drgeoff
Fri Jun 22, 2018 6:33 pm
Forum: Networking and servers
Topic: Network Speed Issues & Samba NAS
Replies: 10
Views: 275

Re: Network Speed Issues & Samba NAS

There are known issues, being worked on but not yet solved, with the 3B+ ethernet. Set aside some time to have a slow, careful read of viewtopic.php?f=63&t=208512
by drgeoff
Fri Jun 22, 2018 5:30 pm
Forum: Off topic discussion
Topic: Posting a Pi setup to a friend.
Replies: 6
Views: 190

Re: Posting a Pi setup to a friend.

I'm constantly amazed that despite the minimal and flimsy packaging, the stuff I order from China suffers so little damage in transit to me in the UK.
by drgeoff
Fri Jun 22, 2018 4:02 pm
Forum: General discussion
Topic: Distorted videos with iptv
Replies: 2
Views: 109

Re: Distorted videos with iptv

1. The MPEG-2 licence will only help when viewing video that is encoded with MPEG-2. A lot of video on the web is not. 2. RPis have hardware accelerated decoding of H.264 (and MPEG-2 if the codec licence is enabled). However unless the video player can invoke and utilise the hardware acceleration th...
by drgeoff
Fri Jun 22, 2018 3:52 pm
Forum: Beginners
Topic: Transfer real-time video over 4G cellular network
Replies: 5
Views: 126

Re: Transfer real-time video over 4G cellular network

Uncompressed 1080P video equates to over 1 Gbit/s. So you will need compression (encoding) at the sending end and decompression at the receiving end. You have not explicitly said that you want to use a RPi. You have also not clarified what camera, its output interface and signal type. Nor have you s...
by drgeoff
Thu Jun 21, 2018 12:54 pm
Forum: Advanced users
Topic: Output Dry contact
Replies: 7
Views: 203

Re: Output Dry contact

pcmanbob wrote:
Thu Jun 21, 2018 11:10 am
the relay would defiantly work
Ensure you exert your authority. :D
by drgeoff
Thu Jun 21, 2018 9:38 am
Forum: Troubleshooting
Topic: Connecting EC sensor to model 3B+
Replies: 2
Views: 60

Re: Connecting EC snsor to model 3B+

I could not find any relevant technical info on the web site. The only thing I can write with absolute certainty is that connecting directly to RPi GPIOs will not work.
by drgeoff
Thu Jun 21, 2018 7:37 am
Forum: Troubleshooting
Topic: 16GB SD card appears as 8GB
Replies: 1
Views: 79

Re: 16GB SD card appears as 8GB

Try formatting in a digital camera. If that doesn't work, discard the card.
by drgeoff
Thu Jun 21, 2018 7:32 am
Forum: General discussion
Topic: Raspberry Pi 3 B+ POE - Powering other devices 8 - 12 V DC & 150 mA
Replies: 13
Views: 335

Re: Raspberry Pi 3 B+ POE - Powering other devices 8 - 12 V DC & 150 mA

Probaby not. RPis run from 5 volts. There is no reason for the PoE hat to produce any other voltage. True PoE uses 48 volts at the injecting end.
by drgeoff
Wed Jun 20, 2018 11:53 am
Forum: Beginners
Topic: Power 12v electromagnet and control it with raspberry
Replies: 2
Views: 70

Re: Power 12v electromagnet and control it with raspberry

1. You will need more components than you have shown. At least a 5 volts power supply and another supply for the door lock.

2. Why aren't you asking your teacher(s)?
by drgeoff
Tue Jun 19, 2018 7:03 pm
Forum: Networking and servers
Topic: Long range internet
Replies: 11
Views: 403

Re: Long range internet

And what if i need 200 meters ? What can i use Maybe a couple of outdoor mounted units like the TP-Link CPE-210. I don't know the specific capabilities of those but ISTR that an earlier version (the TL-WA5210G) could be configured as a W-Fi client as an alternative to the normal Access Point mode. ...
by drgeoff
Tue Jun 19, 2018 6:36 pm
Forum: Beginners
Topic: Connecting to Windows
Replies: 13
Views: 307

Re: Connecting to Windows

I have found WD CloudMirror devices to be particularly Unix-unfriendly, despite the fact that (like most similar devices) their firmware is Unix-based. Without modifying the storage device's firmware, it appears not to be possible to link one of these to more than one Pi at a time. The whole point ...
by drgeoff
Tue Jun 19, 2018 6:25 pm
Forum: Beginners
Topic: Can USB Printer be Wireless via RPi without Need of Router/Internet Connection?
Replies: 6
Views: 134

Re: Can USB Printer be Wireless via RPi without Need of Router/Internet Connection?

There are at least two separate parts.

1. Configure the RPi as a Wi-Fi Access Point and connect your phone to it.

2, Configure a print server on the RPi.

I expect you can use a search engine just as well as I can.
by drgeoff
Tue Jun 19, 2018 5:44 pm
Forum: Graphics, sound and multimedia
Topic: How do I add a headphone jack?
Replies: 16
Views: 634

Re: How do I add a headphone jack?

this will not work for a bridge amp r + - and l + - should never be connected to each outher or it will blow up the amp chip you need 4 pole plug on the headphone and 4 switch contacts good luck crofter My circuit with the single capacitor to ground will work for a bridge amplifier. It does not con...
by drgeoff
Tue Jun 19, 2018 5:09 pm
Forum: Beginners
Topic: Can USB Printer be Wireless via RPi without Need of Router/Internet Connection?
Replies: 6
Views: 134

Re: Can USB Printer be Wireless via RPi without Need of Router/Internet Connection?

Without a connection to the internet. Yes.

Without a router. Yes.
by drgeoff
Sun Jun 17, 2018 10:53 pm
Forum: Networking and servers
Topic: Long range internet
Replies: 11
Views: 403

Re: Long range internet

All well and good but doesn't apply to the OP. :(
by drgeoff
Sun Jun 17, 2018 6:27 pm
Forum: Networking and servers
Topic: Long range internet
Replies: 11
Views: 403

Re: Long range internet

https://www.air802.com/fcc-rules-and-regulations.html

For 2.4 GHz point to point. 1 watt and 6 dbi antenna.

For 5 GHz point to point. 1 watt and 23 dbi antenna. (See note 3 below the table.)
by drgeoff
Sun Jun 17, 2018 5:40 pm
Forum: Networking and servers
Topic: Long range internet
Replies: 11
Views: 403

Re: Long range internet

The limits are on EIRP. Aerial (antenna) gain modifies the allowable RF power from the transmitter electronics. That makes SurferTim's 1 watt and 15 db gain antenna illegal in the US.

The 100mW plus 25db antenna would be illegal in Belgium.
by drgeoff
Sun Jun 17, 2018 11:02 am
Forum: General discussion
Topic: 2.4ghz rc receivers
Replies: 5
Views: 220

Re: 2.4ghz rc receivers

Although one of the Wi-Fi bands is 2.4 GHz that does not mean that everything operating at 2.4 GHz is using Wi-Fi.

If you are attempting to use the onboard Wi-Fi of a RPi or a USB Wi-Fi dongle to communicate with RC gear you are almost certainly doomed to failure.
by drgeoff
Sat Jun 16, 2018 7:45 pm
Forum: General discussion
Topic: Generating smoke from a Pi Zero
Replies: 15
Views: 459

Re: Generating smoke from a Pi Zero

jondallimore wrote:
Sat Jun 16, 2018 6:55 pm
also - it depends on the type of cable - most phone cables have 2 data wires in them as well. Not sure if that would affect a Pi, but its a possibility.
The two data pins on the PWR socket go nowhere. They are not connected to anything.
by drgeoff
Sat Jun 16, 2018 6:32 pm
Forum: General discussion
Topic: Generating smoke from a Pi Zero
Replies: 15
Views: 459

Re: Generating smoke from a Pi Zero

The same Ravpower charger output still works with a different USB cable, it did not fry another Pi Sounds like it may have been a defective usb cable. Have you used that particular cable before? Cheers. I fail to see how a defective cable could cause that. Cable faults are: 1. Open circuit in one o...
by drgeoff
Sat Jun 16, 2018 6:09 pm
Forum: General discussion
Topic: Generating smoke from a Pi Zero
Replies: 15
Views: 459

Re: Generating smoke from a Pi Zero

That "square chip" is an inductor. Part of one of the voltage step down circuits.
by drgeoff
Sat Jun 16, 2018 10:12 am
Forum: Troubleshooting
Topic: Connect PI with external Synology DSM NAS
Replies: 13
Views: 423

Re: Connect PI with external Synology DSM NAS

glenn2509 wrote:
Sat Jun 16, 2018 9:00 am
Hi, with my iPhone I get from external access to my nas by using Safari and entering my ip- address with additional “:5001” i.e. 91.xxx.xxx.xxx:5001
Do the same with the external RPi.

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