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by rpdom
Tue Aug 22, 2017 9:16 pm
Forum: Advanced users
Topic: battery problem
Replies: 9
Views: 193

Re: battery problem

SurferTim wrote:
Tue Aug 22, 2017 9:09 pm
The charger circuit is a bit more complex, especially if you want to balance charge a 4S battery.
This. You cannot charge four cells in serial without the right balance charger or you could end up with one dead cell and three good ones and no output.
by rpdom
Tue Aug 22, 2017 8:57 pm
Forum: The Staffroom
Topic: Can I Teach my 4 Year Old to Program?
Replies: 17
Views: 4209

Re: Can I Teach my 4 Year Old to Program?

neilakos wrote:
Tue Aug 22, 2017 2:00 pm
4 does seem waaay too early, but games like Minecraft are supposedly helping with learning code, so i guess around 8-9 is a good time to teach
The Code Club that I help run is usually for 9-11 year-olds, but we have had one (barely) 8 year old join and she is doing really well.
by rpdom
Tue Aug 22, 2017 8:52 pm
Forum: Beginners
Topic: Encrypt MicroSD Card Hard Drive?
Replies: 6
Views: 86

Re: Encrypt MicroSD Card Hard Drive?

pcmanbob wrote:
Tue Aug 22, 2017 8:28 pm
Seagate used to make a 1" physical hard drive in compact flash card format, I still have one .
IBM did them first. Called them Microdrives (I have one) even though Sinclair had already used the name for their dodgy tape loop drives (I had a couple of those too)
by rpdom
Tue Aug 22, 2017 8:49 pm
Forum: General discussion
Topic: Time after time . . . .
Replies: 3
Views: 81

Re: Time after time . . . .

Setting the time with the date command won't work. In Raspbian you can select you timezone using "sudo raspi-config" and selecting the "4 Localisation Options", then "I2 Change Timezone" and chose "America", then scroll sown a lot to "Belize" (they're not all in order). Select that, then reboot when...
by rpdom
Tue Aug 22, 2017 8:10 pm
Forum: Advanced users
Topic: battery problem
Replies: 9
Views: 193

Re: battery problem

As far as I know ,all LIPO batteries are the same ~3.7V? I guessing you mean a higher capacity battery, not higher voltage? To be pedantic, check the definition of "battery" as opposed to "cell". I know most people use the "incorrect" definition, but technically a single cell "battery" is just a ce...
by rpdom
Tue Aug 22, 2017 7:47 pm
Forum: Troubleshooting
Topic: keeps finding same updates
Replies: 1
Views: 41

Re: keeps finding same updates

You need to check that your SD card hasn't failed into safe read-only mode. First create a file in your home directory, then reboot. pi@raspberrypi:~ $ touch ismycarddead pi@raspberrypi:~ $ sudo reboot When the reboot has completed, check to see if the file is still there pi@raspberrypi:~ $ ls ismyc...
by rpdom
Tue Aug 22, 2017 7:39 pm
Forum: Beginners
Topic: webserver without ssh !!
Replies: 5
Views: 107

Re: webserver without ssh !!

raspi-owner wrote:
Tue Aug 22, 2017 6:44 pm
And can someone still manage to hack it on port 22 or is it forever closed as long as i dont enable ssh ??
Port 22 is for ssh (unless you do something unusual). Without ssh there is no active port 22.
by rpdom
Tue Aug 22, 2017 7:37 pm
Forum: Beginners
Topic: Connecting two devices to my pi zero
Replies: 7
Views: 89

Re: Connecting two devices to my pi zero

Get a hub. GPIO hub... is that something new? :lol: It might be possible to use both together. The second one uses the i2c interface, so pins 5 and 7 (Power and ground can be common to both boards). The first one uses SPI for touch, but I haven't checked what it uses for the display. Possibly i2c a...
by rpdom
Tue Aug 22, 2017 6:07 am
Forum: General discussion
Topic: Reset admin password?
Replies: 1
Views: 75

Re: Reset admin password?

That's a NOOBS system. You won't be able to edit the Raspbian files directly using Windows (except maybe on some recent versions) as they are in another partition. With NOOBS you should be able to fix this with your Pi. Just repeatedly tap the Shift key while the Pi boots and you should get to a Rec...
by rpdom
Tue Aug 22, 2017 5:58 am
Forum: Troubleshooting
Topic: Respberry PI2 B V1.1 Memory card holder, ESP8266,ESP32 Development board ? ?
Replies: 3
Views: 94

Re: Respberry PI2 B V1.1 Memory card holder, ESP8266,ESP32 Development board ? ?

I have also used the elastic band method, although I eventually got some fine tipped tweezers and pulled out the spring from the SD card slot (just about visible through a hole in the top of the card slot) and now the card is push-in/pull-out just like the Pi 3
by rpdom
Mon Aug 21, 2017 8:32 pm
Forum: Beginners
Topic: Regarding rasberry pi usb library
Replies: 14
Views: 314

Re: Regarding rasberry pi usb library

Yes, the command I used to build USB software was cc -g -o outputfile sourcefile.c -lusb-1.0
by rpdom
Mon Aug 21, 2017 6:04 pm
Forum: Off topic discussion
Topic: `iot` ;] unable to establish connection ...
Replies: 3
Views: 127

Re: `iot` ;] unable to establish connection ...

Heater wrote:
Mon Aug 21, 2017 5:44 pm
HTTP Error 418
Are you short and stout? :lol:
by rpdom
Mon Aug 21, 2017 6:02 pm
Forum: Beginners
Topic: A simple batch to determine which Raspberry Pi you have.
Replies: 5
Views: 181

Re: A simple batch to determine which Raspberry Pi you have.

Umm... Okay. That's an intersting exercise in writing bash scripts, but why? I find it easier to just read what is printed on the PCB if I can't tell what model of Pi I'm working with at a glance. (I think the only general distribution Pi I don't have at least one of is the 256MB Model B v2.) I sup...
by rpdom
Mon Aug 21, 2017 6:47 am
Forum: Beginners
Topic: Regarding rasberry pi usb library
Replies: 14
Views: 314

Re: Regarding rasberry pi usb library

Often the USB device will show up as a serial port and you can access that without needing to touch any USB code.

However, if you want to write code to use USB you will probably need to install libusb-dev and libusb-1.0-0-dev for C and additionally libusb++-dev if you are going to use C++.
by rpdom
Sun Aug 20, 2017 8:02 pm
Forum: Off topic discussion
Topic: Buying a Zero in the US
Replies: 5
Views: 165

Re: Buying a Zero in the US

ab1jx wrote:
Sun Aug 20, 2017 7:58 pm
I've bought plenty of stuff direct from China by mail at $2 or less shipping.
That's not comparable as shipping many items from China is subsidised by their government to increase exports.
by rpdom
Sun Aug 20, 2017 4:19 pm
Forum: Troubleshooting
Topic: [Solved] Pi Will Not Boot
Replies: 6
Views: 181

Re: Pi Will Not Boot

When I have the time to I will try the clothsepin and cleaning it, but for now: Size: 16 gb card Image: 2017-07-05-raspbian-jessie Software: etcher from etcher.io Thank you. That has ruled out a couple of issues (Card is not 64GB or greater, so it's not the exFAT problem. Image is known to have iss...
by rpdom
Sun Aug 20, 2017 4:16 pm
Forum: Beginners
Topic: help me found how to use this screen!
Replies: 7
Views: 237

Re: help me found how to use this screen!

DirkS wrote:
Sun Aug 20, 2017 4:14 pm
rpdom wrote:
Sun Aug 20, 2017 4:10 pm
I can't see the "yellow wire kinda large thing under the screen" in your pictures,
I think the OP is referring to the orange / brown flex cable in the 3rd image.
Ah, could be. In that case it is unlikely to be any use, especially not without a datasheet for the screen.
by rpdom
Sun Aug 20, 2017 4:10 pm
Forum: Beginners
Topic: help me found how to use this screen!
Replies: 7
Views: 237

Re: help me found how to use this screen!

I can't see the "yellow wire kinda large thing under the screen" in your pictures, but it yellow things on screens used for cars (sat-nav?) are sometimes an RCA connector for connecting a reversing camera. If that is the case you can use the A/V output on a Pi to connect to it and give a lowish qual...
by rpdom
Sun Aug 20, 2017 3:56 pm
Forum: Networking and servers
Topic: How can I access two Raspberry Pi web servers over the internet using noip.com
Replies: 6
Views: 246

Re: How can I access two Raspberry Pi web servers over the internet using noip.com

Configure the router as follows: Wan port 80 to LAN IP of RPi #1 and port 80 Wan port 81 to LAN IP of RPi #2 and port 80 Access RPi #1 using your dynamic address Access RPi #2 using your dynamic address:81 If that router is the same as my Virgin Media Super(cough!)hub, it can't forward to a differe...
by rpdom
Sun Aug 20, 2017 3:16 pm
Forum: Raspbian
Topic: How to manually install wifi drivers
Replies: 7
Views: 191

Re: How to manually install wifi drivers

Have you got another Pi? B+, 2B, 3B? If so you could put the SD card in that and install the drivers before putting it back in the Pi Zero.
by rpdom
Sun Aug 20, 2017 5:34 am
Forum: Cases
Topic: Aluminum enclosure for Raspberry Pi
Replies: 41
Views: 12336

Re: Aluminum enclosure for Raspberry Pi

3dh wrote:
Sun Aug 20, 2017 5:15 am
How does the reset button work? Like extract and insert a power supply, or like the "reboot" command?
It is a hard reset (like removing the power), not like reboot or shutdown.
by rpdom
Sun Aug 20, 2017 5:16 am
Forum: Raspbian
Topic: operation not permitted wrt linux-image-rpi-rpfv apt-get attempt
Replies: 4
Views: 123

Re: operation not permitted wrt linux-image-rpi-rpfv apt-get attempt

I suspect the partition that ran out of space was /boot, not the main partition. Perhaps you could try putting your card in another Linux system and using gparted to resize the partitions to make the first partition bigger? ISTR some versions of gparted have problems resizing MSDOS partitions. You m...
by rpdom
Sun Aug 20, 2017 5:06 am
Forum: Troubleshooting
Topic: [Solved] Pi Will Not Boot
Replies: 6
Views: 181

Re: Pi Will Not Boot

I haven't checked, but I'm sure the sticky say that if the red light is on, but the green light does nothing then the Pi is unable to read the boot files from SD card. It may also mention that this can be due to bad contacts in the card socket or sometimes the full-sized SD card that the early Pi 1 ...
by rpdom
Sat Aug 19, 2017 9:49 pm
Forum: Advanced users
Topic: Wake from halt
Replies: 65
Views: 45414

Re: Wake from halt/Using i2C

Does anyone know what happens if u pull pin5 low when u have i2c devices connected to it? Because if i make a switch connection on pin5 & 6 it will be pulled low what i want to know is does it damage the i2c bus? It won't damage the bus. i2c devices work by pulling the bus low. There are resistors ...
by rpdom
Sat Aug 19, 2017 9:47 pm
Forum: Add-ons
Topic: Controlling WS2812B from RPi 3b
Replies: 7
Views: 170

Re: Controlling WS2812B from RPi 3b

Pin 18 is PWM. You may want to check: Since this library and the onboard Raspberry Pi audio both use the PWM, they cannot be used together. You will need to blacklist the Broadcom audio kernel module by creating a file /etc/modprobe.d/snd-blacklist.conf with blacklist snd_bcm2835 It should be enoug...

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