Go to advanced search

by drgeoff
Tue Jul 17, 2018 2:50 pm
Forum: Networking and servers
Topic: SATA
Replies: 1
Views: 25

Re: SATA

An external USB drive consists of a USB-SATA interface and a SATA drive.

To connect a SATA drive to a RPi you would need a USB-SATA interface.

"6 of one or half a dozen of the other."
by drgeoff
Tue Jul 17, 2018 2:39 pm
Forum: Beginners
Topic: Pi 3 model B+ not boot
Replies: 4
Views: 72

Re: Pi 3 model B+ not boot

Download Raspbian lite and use Etcher to put it on a card. (No need to unzip the Raspbian as Etcher will handle that.)

Does that boot?
by drgeoff
Tue Jul 17, 2018 2:07 pm
Forum: Beginners
Topic: fresh install raspi3: no graphical login
Replies: 2
Views: 29

Re: fresh install raspi3: no graphical login

Raspbian lite does not have the graphical desktop.

If you wan the GUI you need to add it.

Or install the full Raspbian.
by drgeoff
Tue Jul 17, 2018 10:57 am
Forum: Automation, sensing and robotics
Topic: Is it possible to read the value of a UK dimmer switch with Raspberry Pi?
Replies: 21
Views: 330

Re: Is it possible to read the value of a UK dimmer switch with Raspberry Pi?

daviestar wrote:
Tue Jul 17, 2018 8:45 am
the shaft is 6-7mm
The standard pot shaft (not just in the UK) is 1/4 inch diameter with a locating flat for the grub screw or spring bar of the knob.
by drgeoff
Tue Jul 17, 2018 10:40 am
Forum: General discussion
Topic: trying to bring up a raspberry pI
Replies: 2
Views: 84

Re: trying to bring up a raspberry pI

You cannot realistically expect help if you provide so little information.
by drgeoff
Mon Jul 16, 2018 9:55 pm
Forum: Advanced users
Topic: Controlling the Power Consumption of RPi Models
Replies: 7
Views: 5402

Re: Controlling the Power Consumption of RPi Models

If GeekMike is applying for a US patent, the US Patent Office will grant almost anything that is not blindingly obvious even if prior art exists.
by drgeoff
Mon Jul 16, 2018 9:47 pm
Forum: Beginners
Topic: Controlling Pi over Long Distances
Replies: 6
Views: 119

Re: Controlling Pi over Long Distances

Surely "control" is the lesser of your worries. How are you going to get moving video from the car to you?
by drgeoff
Mon Jul 16, 2018 7:14 pm
Forum: Troubleshooting
Topic: Pi 3B+ / Shorting 3.3V to GND
Replies: 14
Views: 284

Re: Pi 3B+ / Shorting 3.3V to GND

It would be a race between a chip's delicate internals being fried and a piece of wire inside the fuse heating up and melting.

Guess who the winner would be.

(Hint. You probably will not like the answer.)
by drgeoff
Mon Jul 16, 2018 7:05 pm
Forum: Automation, sensing and robotics
Topic: Is it possible to read the value of a UK dimmer switch with Raspberry Pi?
Replies: 21
Views: 330

Re: Is it possible to read the value of a UK dimmer switch with Raspberry Pi?

Thanks for the replies, and apologies for the confusion, I did indeed mean a standard UK dimmer switch module with push on/off. Some thing like this: https://www.amazon.co.uk/Varilight-Standard-Dimmer-Classic-Plastic/dp/B01N1806WY What are you trying to do with it? I am working on a smart light swi...
by drgeoff
Mon Jul 16, 2018 5:13 pm
Forum: Beginners
Topic: Network Attached Storage: Pi not visible on home network
Replies: 2
Views: 53

Re: Network Attached Storage: Pi not visible on home network

Can you ping the RPi from the PC? And vice versa?
by drgeoff
Mon Jul 16, 2018 5:07 pm
Forum: Automation, sensing and robotics
Topic: connecting multiple magnetic switches
Replies: 23
Views: 2212

Re: connecting multiple magnetic switches

Voltage drop is not the problem - no need to use more than the 3.3 volt rail. Possible pickup into longish wires, especially when the switch is open is the issue. Simplest way to deal with that is to add a series resistor and a decoupling capacitor. One end of that resistor to the junction of switch...
by drgeoff
Mon Jul 16, 2018 4:45 pm
Forum: Media centres
Topic: DLNA client via browser?
Replies: 2
Views: 88

Re: DLNA client via browser?

Install piCoreplayer on the RPi. Use its menu to install Logitech Media Server. In LMS install Philippe's UPnP/DLNA bridge plugin.

Control from a browser.

(If you have any Chromecasts, also install Philippe's Castbridge plugin.)
by drgeoff
Mon Jul 16, 2018 4:37 pm
Forum: Media centres
Topic: Portable Plex Pi Media Server and Hotspot Bridge
Replies: 3
Views: 101

Re: Portable Plex Pi Media Server and Hotspot Bridge

Plex Media Server.
by drgeoff
Mon Jul 16, 2018 10:14 am
Forum: Advanced users
Topic: What would the max frequency of a C program be?
Replies: 4
Views: 148

Re: What would the max frequency of a C program be?

Same answer as for "How long is a piece of string?"

It depends.
by drgeoff
Mon Jul 16, 2018 10:06 am
Forum: Beginners
Topic: VOIP Server RPI
Replies: 2
Views: 81

Re: VOIP Server RPI

Asterisk running on a RPi is far from sufficient to meet the OP's requirement. Asterisk is a switch for digital phone signals. It cannot be connected directly to a standard analogue (POTS/PSTN) phone or phone line. You need an Analogue Telephone Adapter (ATA) to do that. FXS port for phone, FXO port...
by drgeoff
Sat Jul 14, 2018 11:11 pm
Forum: Advanced users
Topic: PWM hardware for dimming LCD
Replies: 3
Views: 135

Re: PWM hardware for dimming LCD

Inadequate PSU whose voltage falls too much when RPi begins working harder and drawing more current?
by drgeoff
Sat Jul 14, 2018 11:01 pm
Forum: Troubleshooting
Topic: Pi 3B+ / Shorting 3.3V to GND
Replies: 14
Views: 284

Re: Pi 3B+ / Shorting 3.3V to GND

There is a chip (U8, a XR77004) on the 3B+ which contains most of the circuitry for some DC-DC converters. See https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3bplus_1p0_reduced.pdf. One of those converters is for the 3.3 volt rail. I would not place any credence on...
by drgeoff
Sat Jul 14, 2018 8:13 pm
Forum: General discussion
Topic: Power Cable with switch
Replies: 16
Views: 387

Re: Power Cable with switch

Switch the AC mains supply to the PSU.
by drgeoff
Sat Jul 14, 2018 8:29 am
Forum: Beginners
Topic: Connect USB device via GPIO pins?
Replies: 4
Views: 136

Re: Connect USB device via GPIO pins?

rpdom wrote:
Sat Jul 14, 2018 7:04 am
If you are really keen, and good at soldering/desoldering, you could remove one of the USB connector pairs and wire the device in to the holes.

You could break your Pi if you get it wrong.
No need to remove the connector. Solder wires to the underside of the board.
by drgeoff
Thu Jul 12, 2018 11:04 pm
Forum: Beginners
Topic: how to run .exe file on raspberry pi 3
Replies: 4
Views: 209

Re: how to run .exe file on raspberry pi 3

For the 1000th time, RPis do not have x86 processors that exe programs are compiled for.

There is a commercial piece of software by Exagear which is an emulator. Whether that can run your exe I won't hazard a guess.
by drgeoff
Thu Jul 12, 2018 7:55 pm
Forum: General discussion
Topic: 3g/4g HAT/Shield
Replies: 2
Views: 100

Re: 3g/4g HAT/Shield

I've never heard of a 3G/4G HAT or dongle that includes Global Positioning System.
by drgeoff
Thu Jul 12, 2018 7:50 pm
Forum: Troubleshooting
Topic: Unable to Connect/Boot Raspberry Pi To Monitor
Replies: 4
Views: 118

Re: Unable to Connect/Boot Raspberry Pi To Monitor

1. Read the "not booting" sticky. 2. Common user errors are 1) copying the NOOBS files and folders to a folder on the card instead of the root. You should not see only a single folder at the top level of the card. 2) Using a 64 Gbyte or larger card and not changing it from exFAT to FAT32 before copy...
by drgeoff
Thu Jul 12, 2018 7:17 pm
Forum: General discussion
Topic: Micro SD cards on Raspberry pis
Replies: 4
Views: 246

Re: Micro SD cards on Raspberry pis

Yes you can swap cards in and out of a RPi. But be sure to do a software shutdown and power off before removing a card. You cannot hot-swap them.
by drgeoff
Thu Jul 12, 2018 5:38 pm
Forum: Advanced users
Topic: Solar with RPi Zero v1.3
Replies: 11
Views: 265

Re: Solar with RPi Zero v1.3

Mickety wrote:
Thu Jul 12, 2018 5:31 pm
I was thinking about using nickel metal hydride (NiMH) batteries because they don't need charging circuits
Where did you learn that bunkum?

Admittedly not as critical as rechargeable lithiums but you cannot just connect NiMH cells across a solar panel.

Go to advanced search