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by howroyd
Mon Oct 10, 2016 8:39 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C PWM Expander DIP
Replies: 10
Views: 2661

Re: I2C PWM Expander DIP

Really? Which module were you using? I only managed to get about 200Hz which was shimmery but every time the I2C fired or the network got heavy it dropped noticeably to the eye, so seemingly a variable frequency. Arduino is somewhere near 500Hz ish I think which I did on a Nano and it worked well, a...
by howroyd
Mon Oct 10, 2016 8:11 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C PWM Expander DIP
Replies: 10
Views: 2661

Re: I2C PWM Expander DIP

Cool, thanks. I need 8 :(
by howroyd
Mon Oct 10, 2016 8:02 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C PWM Expander DIP
Replies: 10
Views: 2661

Re: I2C PWM Expander DIP

Software. I was under the impression that the pi only has one hardware pwm pin?
by howroyd
Mon Oct 10, 2016 7:11 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C PWM Expander DIP
Replies: 10
Views: 2661

Re: I2C PWM Expander DIP

The Pi GPIO PWM isn't fast enough (tried it) so you get a really irritating shimmer on the LEDs. I'm not avoiding SMD soldering, I can do that fine but if I am going to do that I may as well design and etch a proper PCB which I am trying to avoid. Id like to use a breadboard HAT ultimately to keep t...
by howroyd
Mon Oct 10, 2016 3:49 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C PWM Expander DIP
Replies: 10
Views: 2661

I2C PWM Expander DIP

Hi all I've spent hours looking for a DIP chip I can use on a custom circuit (breadboard) to give me 8 (or more) PWM channels for driving some MOSFETs hooked up to LED strings and fans. Needs to have each channel controllable over I2C, resolution isn't overly important, min of 4bit. 3V3 logic level ...
by howroyd
Wed Oct 05, 2016 8:05 pm
Forum: General discussion
Topic: Google Assistant
Replies: 6
Views: 6385

Re: Google Assistant

That is really interesting, thanks!

I believe the Amazon kit integrates with Google so a convoluted link may make things work.

Hooking up Jasper to Google could be an interesting project!
by howroyd
Tue Oct 04, 2016 7:39 pm
Forum: General discussion
Topic: Google Assistant
Replies: 6
Views: 6385

Google Assistant

Hi all So I have just watched the announcements live stream from Google about Assistant, Pixel, Home etc etc. https://www.youtube.com/watch?v=q4y0KOeXViI&t=1535s Now I know you can have IFTTT integration on the pi, but how about getting Google Assistant on the pi? I know it is early days yet but I j...
by howroyd
Thu Sep 22, 2016 5:21 pm
Forum: Troubleshooting
Topic: Arduino Programming over Serial
Replies: 1
Views: 671

Arduino Programming over Serial

Hello all, Right, firstly there seems to be loads of information out there but not for this specific problem (that I can find). Mega thanks to anyone who can help. I have an Arduino Nano hooked up to my Pi (2B) on the rx/tx lines, crossed and via a LLC. I want to use avrdude to program my Arduino ov...
by howroyd
Wed Apr 27, 2016 10:40 am
Forum: Troubleshooting
Topic: Automount USB
Replies: 0
Views: 307

Automount USB

Morning all, I am trying to auto mount a usb memory stick when connected. IE without needing to reboot using fstab. I am trying to get autofs to work but having no luck: /etc/auto.master +auto.master /media/usb /etc/auto.ext-usb --timeout=2,defaults,user,exec,uid=1000 /etc/auto.ext-usb usb -fstype=v...
by howroyd
Wed Jul 09, 2014 11:12 am
Forum: Troubleshooting
Topic: Connecting USB devices reboot the Pi
Replies: 14
Views: 16465

Re: Connecting USB devices reboot the Pi

Same issue here. Pretty convinced it is a power surge which brwns out the rPi.

Has anyone tried soldering a decent sized capacitor onto the 5v rail to handle the surge?
by howroyd
Tue Jul 08, 2014 9:52 pm
Forum: Networking and servers
Topic: Raspi WiFi Access Point bridges to a second WiFi Dongle
Replies: 0
Views: 752

Raspi WiFi Access Point bridges to a second WiFi Dongle

Evening all, Trying to set up an interesting one... I have setup my Pi as a WiFi Access Point using hostapd , and am able to bridge this to eth0 . This is well documented elsewhere. I now want to remove the eth0 associations and replace them with a second wifi dongle, to become wlan1 associations. H...
by howroyd
Sat Dec 21, 2013 10:54 am
Forum: General discussion
Topic: Hydrogen Fuel Cell Controller Demonstration
Replies: 3
Views: 1177

Re: Hydrogen Fuel Cell Controller Demonstration

Thanks Dougie, Yes I have taken the film off now, I didn't realise until I was editing the video how shoddy that looked! The backlight was on, you can see in most of the video, I think it is more an issue with the GoPro which clearly isn't suited to the type of footage I was after! I shall investiga...
by howroyd
Sat Dec 21, 2013 10:02 am
Forum: General discussion
Topic: Hydrogen Fuel Cell Controller Demonstration
Replies: 3
Views: 1177

Hydrogen Fuel Cell Controller Demonstration

Hi all,

Thought you might find this video interesting. Follow me on diydrones and element14 if you are!

Cheers, merry christmas,

Simon
by howroyd
Mon Sep 23, 2013 10:19 am
Forum: Camera board
Topic: Streaming Raspberry Pi Camera H264 into HTML over RTMP
Replies: 199
Views: 261843

Re: Streaming Raspberry Pi Camera H264 into HTML over RTMP

Hi all, Really struggling and got minimal scalp left from head scratching. Installed crtmpserver, all good no probs. Installed ffmpeg from source, all good no probs. jwplayer in /var/www/jwplayer as expected. Run the stream results in this until I Ctrl-C it: pi@raspberrypi /var/www $ raspivid -t 999...
by howroyd
Thu May 30, 2013 1:21 pm
Forum: Python
Topic: Kernel Panic - i2c
Replies: 1
Views: 637

Kernel Panic - i2c

Hi all, This has happened to me twice today and I have no idea why. Both times bugger the SD card so I have to flash and start from scratch. Ubuntu doesn't recognise it (timeout error 110 on dmesg) so I can't do fsck to repair. Can anyone spot the error? I assume it's a memory addressing issue?? My ...
by howroyd
Sat Apr 20, 2013 8:39 am
Forum: General programming discussion
Topic: Serial 2 file the back again
Replies: 2
Views: 900

Re: Serial 2 file the back again

Cheers very much. I shall look into this today...after watching the F1 ;-)

Thank you
by howroyd
Fri Apr 19, 2013 2:14 pm
Forum: General programming discussion
Topic: Serial 2 file the back again
Replies: 2
Views: 900

Serial 2 file the back again

Anyone know how to save data from the serial (tx,rx) to a file, and then be able to send it back out again at the same speed it was received? My application is an onboard datalogger for a remote controlled plane, saving the serial stream from the autopilot (an encoded stream), which I can then send ...
by howroyd
Fri Apr 19, 2013 2:04 pm
Forum: Beginners
Topic: Installing ser2net from a tar.gz
Replies: 10
Views: 9222

Re: Installing ser2net from a tar.gz

Good stuff.

Side note, anyone know a programme with similar functionality but with UDP rather then TCP? I keep getting comms losses with the plane, and it's a pain having to keep clicking reconnect when it comes back into range. UDP would solve this I think.
by howroyd
Thu Apr 18, 2013 8:46 pm
Forum: Beginners
Topic: Installing ser2net from a tar.gz
Replies: 10
Views: 9222

Re: Installing ser2net from a tar.gz

Yes, the copy of ser2net on apt-get is pretty old, version 2.6. Yoou can download the new one and make it yourself, which is version 2.8 and has full functionality. Although I did manage to get 2.6 working, here is the code for getting the new one which isn't on apt-get yet. cd /usr/local/bin/ sudo ...
by howroyd
Tue Apr 16, 2013 2:11 pm
Forum: Beginners
Topic: Installing ser2net from a tar.gz
Replies: 10
Views: 9222

Re: Installing ser2net from a tar.gz

Cheers for the help all. Now got it working well, saving the serial stream to two log files, one for tx, the other rx. Sends over TCP so you can connect to the UART port over the network. The full setup code is below for anyone else wishing to do this. Also, if anyone is interested in my project, so...
by howroyd
Tue Apr 16, 2013 7:51 am
Forum: Beginners
Topic: Installing ser2net from a tar.gz
Replies: 10
Views: 9222

Installing ser2net from a tar.gz

Hi all, I am quite competent at installing stuff using apt-get, however the latest version of ser2net is not available in apt-get, and I require the functionality of the new release. (Ser2Net allows you to communicate with the raspPi UART over a network invisibly. I have mine connected to ArduPilot ...
by howroyd
Fri Apr 12, 2013 8:39 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: ser2net tracefile
Replies: 2
Views: 3281

Re: ser2net tracefile

Cheers,

I have put it up on their site at the link below if anyone else is interested.

https://sourceforge.net/p/ser2net/discu ... /f20632bb/
by howroyd
Thu Apr 11, 2013 1:33 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: ser2net tracefile
Replies: 2
Views: 3281

ser2net tracefile

Hi all, I'm using ser2net to read in a serial stream and pump it out over TCP. Working well. However, I want to include functionality to save the log to the sd card, which according to the ser2net info is just a line of code. However, when I use this it crashes when connecting to the port, saves no ...
by howroyd
Wed Mar 27, 2013 10:36 am
Forum: Graphics, sound and multimedia
Topic: HDMI as an input?
Replies: 7
Views: 10984

Re: HDMI as an input?

Apparently this is possible. My friend has done it and said it was just a switch in the kernel code. I shall try and find out for you.
by howroyd
Fri Nov 02, 2012 3:13 pm
Forum: Beginners
Topic: A good live webcam streaming tutorial?
Replies: 16
Views: 19341

Re: A good live webcam streaming tutorial?

Smashing, cheers gents

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