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by rpdom
Wed Sep 18, 2019 4:42 pm
Forum: Advanced users
Topic: Moving the microSD Card between RPi Zero W and RPi Zero
Replies: 7
Views: 101

Re: Moving the microSD Card between RPi Zero W and RPi Zero

Indeed. Many's the time I've take the hard drive out of one Linux PC and dropped it into another Linux PC with no work needed at all. Even laptop to desktop.
by rpdom
Wed Sep 18, 2019 12:02 pm
Forum: Troubleshooting
Topic: USB Blown is there any USB output on GP10.
Replies: 13
Views: 227

Re: USB Blown is there any USB output on GP10.

No, the USB bus is not available on the GPIO.
by rpdom
Tue Sep 17, 2019 9:50 pm
Forum: Beginners
Topic: GPIO pin to trigger 555 astable circuit
Replies: 4
Views: 90

Re: GPIO pin to trigger 555 astable circuit

Regarding the flashing LED, my thoughts are that hardware will be better that software in this case. To do it in software I will need to spawn a separate thread with its own loop, turning the LED on and off The RPi is not exactly a powerful device. I will already have 2 threads running - one for th...
by rpdom
Mon Sep 16, 2019 4:40 pm
Forum: Advanced users
Topic: Image File Utilities
Replies: 22
Views: 1587

Re: Image File Utilities

Fix the Forum so that posts can be deleted. Never done this personally, but I think you can flag your own post and tell the moderator you want it deleted. Hmmm... I've never had any issues deleting my own posts! That's what the garbage can icon does... You can delete them until someone makes anothe...
by rpdom
Mon Sep 16, 2019 6:08 am
Forum: Troubleshooting
Topic: Endless Wifi / WPA_Supplicant reconnect loop
Replies: 5
Views: 144

Re: Endless Wifi / WPA_Supplicant reconnect loop

Seems I solved it... dhclient was interfering with interfaces config. I thought, dhclient would ignore interfaces when configured as dhcp but it ignores everything if any interface is flagged as dhcp in interfaces config. I removed all dhcp config from interfaces and that it worked... Strange thoug...
by rpdom
Mon Sep 16, 2019 5:59 am
Forum: General discussion
Topic: use LDR in IR lamp
Replies: 1
Views: 58

Re: use LDR in IR lamp

Not without additional circuitry.
by rpdom
Mon Sep 16, 2019 5:46 am
Forum: HATs and other add-ons
Topic: PoE hat backfeed protection
Replies: 3
Views: 112

Re: PoE hat backfeed protection

I'd wait for confirmation from a Raspberry Pi Engineer, but I'm pretty certain it has been said that the HAT will not have any problems if the Pi receives a 5V supply from somewhere else.
by rpdom
Mon Sep 16, 2019 5:24 am
Forum: Beginners
Topic: Question Powering 4x Raspberry Pi Zeros with 1 power supply
Replies: 1
Views: 63

Re: Question Powering 4x Raspberry Pi Zeros with 1 power supply

All you need is a power supply that will give a steady 5V (or close enough) at up to about 2A (higher would be fine, but there is no need for it. 1A will work with no other peripherals connected) and you should be fine. There are no fuses or other protection circuity on the Zero (to keep the cost do...
by rpdom
Mon Sep 16, 2019 5:12 am
Forum: Beginners
Topic: Soldering
Replies: 22
Views: 464

Re: Soldering

LTolledo wrote:
Mon Sep 16, 2019 12:51 am
its a DIY arduino nano...
Nice work. :)
by rpdom
Sun Sep 15, 2019 7:21 pm
Forum: General discussion
Topic: Tracking sound location and getting there
Replies: 3
Views: 83

Re: Tracking sound location and getting there

The Yellies were just an example, and they do move towards the sound when not doing other things.

There are some simple microphone sensors for the Pi. I don't know how directional they are or can be made, I have one but haven;t got around to trying it yet.
by rpdom
Sun Sep 15, 2019 6:53 pm
Forum: General discussion
Topic: Tracking sound location and getting there
Replies: 3
Views: 83

Re: Tracking sound location and getting there

Probably can be done with a few simple sensors.

There are toy spiders that do a similar thing. Do a web search on "Yellies" ("Bo Dangles" and "Toothy Spooder" are two of the ones available).
by rpdom
Sun Sep 15, 2019 6:48 pm
Forum: Beginners
Topic: Pi 3 Model B GPIO Questions
Replies: 6
Views: 123

Re: Pi 3 Model B GPIO Questions

Is that the only code needed? Yes. I used this article as a bit of bedtime reading, and they use a different method with a lot of code https://howchoo.com/g/mwnlytk3zmm/how-to-add-a-power-button-to-your-raspberry-pi I've no idea why they decided to use their own code instead of the built-in stuff.
by rpdom
Sun Sep 15, 2019 12:30 pm
Forum: Media centres
Topic: SCART RGB output to old TV set
Replies: 23
Views: 385

Re: SCART RGB output to old TV set

Have you tried wiring an RCA plug to the composite TV header on your Zero? I haven't tried that, it might be an interesting test. But the reason for all the VGA palaver is to get an RGB signal working, which gives a much higher quality picture than composite. Also sound, which isn't available on th...
by rpdom
Sun Sep 15, 2019 11:10 am
Forum: Troubleshooting
Topic: [Not getting my full Gigabit internet speed on RPI 4b 4GB]
Replies: 9
Views: 216

Re: [Not getting my full Gigabit internet speed on RPI 4b 4GB]

DougieLawson wrote:
Sun Sep 15, 2019 9:24 am
Cubuss wrote:
Sun Sep 15, 2019 2:21 am
Bumping this up
You posted at half past eight at night, you bumped at twenty past three in the morning.
At a weekend too.
by rpdom
Sun Sep 15, 2019 10:50 am
Forum: Troubleshooting
Topic: Mount usb drive changes access permission of mount point to root
Replies: 6
Views: 127

Re: Mount usb drive changes access permission of mount point to root

The biggest mystery is why ntfs-3g isn't included in Raspbian by default, that would stop all these NTFS threads appearing on here. I wish I knew where to ask for that. Because the majority of Pi users don't need NTFS support and it would make the downloads bigger. Also, as I understand, the free v...
by rpdom
Sun Sep 15, 2019 7:16 am
Forum: Beginners
Topic: Pi 3 Model B GPIO Questions
Replies: 6
Views: 123

Re: Pi 3 Model B GPIO Questions

Don't use the RUN pins for shutdown/reboot. They are like the Reset button on a PC and will cause an instant reset of the Pi - losing anything that is being written to disk/card at the time and causing corruption of the file system. It is possible to connect a switch to pins 5 and 6 on the GPIO head...
by rpdom
Sun Sep 15, 2019 7:07 am
Forum: Beginners
Topic: Am I running 32 or 64 bit ?
Replies: 9
Views: 330

Re: Am I running 32 or 64 bit ?

Why Raspbian is always "delivered" with an old? / strange version of Arduino (Arduino 2:1.0.5+dfsg2-4.1) instead of the present one Arduino 1.8.10 ? Ask the Debian people. Raspbian is basically the current Debian system recompiled to work on the Pi 1 with a few optimisations, plus some extra Pi spe...
by rpdom
Sun Sep 15, 2019 6:47 am
Forum: General discussion
Topic: Raspberry Pi4 bootloader update package
Replies: 44
Views: 2507

Re: Raspberry Pi4 bootloader update package

I'm left wondering what is this the official Raspberry Pi foundation answer to this issue? They still haven't replied to this issue. Are they going to fix it or not? Did you read the documentation on the link provided? It gives clear instructions on how to read the configuration on the current imag...
by rpdom
Sat Sep 14, 2019 8:01 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 529
Views: 132573

Re: Raspberry Pi 4 temperature

bensimmo wrote:
Sat Sep 14, 2019 6:28 pm
Why the new forum account?
Because the old one had been given a holiday from the forums and "pro" thought they could sneak past the rule by creating a new account?
by rpdom
Sat Sep 14, 2019 4:36 pm
Forum: Beginners
Topic: Uninstall older versions of packages that still exist after newer versions have been installed?
Replies: 6
Views: 128

Re: Uninstall older versions of packages that still exist after newer versions have been installed?

The deborphan command (will need installing) can help tidy up to some extent.
by rpdom
Sat Sep 14, 2019 4:28 pm
Forum: Beginners
Topic: Help with installing printer and drivers
Replies: 8
Views: 176

Re: Help with installing printer and drivers

Try printer-driver-brlaser instead. That is the full package name for it, I believe.
by rpdom
Sat Sep 14, 2019 1:59 pm
Forum: Beginners
Topic: Uninstall older versions of packages that still exist after newer versions have been installed?
Replies: 6
Views: 128

Re: Uninstall older versions of packages that still exist after newer versions have been installed?

it makes no sense having two different versions of a MySQL server installed You may find that the mysql-server package is a dummy transitional package that depends on the mariadb-server now. I'm not at home, so I can't check. If so, it will take up very little space. I seem to recall writing a scri...
by rpdom
Fri Sep 13, 2019 8:49 pm
Forum: Beginners
Topic: How does GPIOs work in raspbian?
Replies: 9
Views: 234

Re: How does GPIOs work in raspbian?

Use BCM everywhere (Broadcom numbering is most sane). Use https://pinout.xyz to find the pins you're seeking. I agree with Dougie. The Pi uses BCM numbers internally, so it is a good idea to get to know them. Then if you want to do any low-level stuff with direct access you will understand it better.
by rpdom
Fri Sep 13, 2019 6:59 pm
Forum: Beginners
Topic: Connecting to camera
Replies: 3
Views: 129

Re: Connecting to camera

There are some adaptors that will allow the use of an HDMI cable to connect the Pi camera to the Pi. That way you can position it further away, but the camera and interface aren't designed to be used at more than about 20cm. Mixed results have been achieved with those adaptors. Some have used them a...
by rpdom
Fri Sep 13, 2019 3:41 pm
Forum: Advanced users
Topic: Raspberry Pi 4 Recommended Mobile Power
Replies: 10
Views: 410

Re: Raspberry Pi 4 Recommended Mobile Power

DougieLawson wrote:
Fri Sep 13, 2019 3:18 pm
Buy the official power supply. That's guaranteed to work with a RPi4B (any flavour).
Oh yes, and run extension leads to each of the robots. :lol:

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