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by Si.
Tue Mar 10, 2015 5:12 pm
Forum: Automation, sensing and robotics
Topic: Ideas
Replies: 6
Views: 1708

Re: Ideas

And Dr. Monk's servo circuit. http://www.doctormonk.com/2012/07/raspb ... servo.html But Dr. Monk's program was fatally flawed. He adds a refresh_period = 0.02 no matter how long the pulse is. That makes a pulse of almost 45HZ at times. I simply subtracted the pulse from the 0.02 delay to make sure...
by Si.
Fri Mar 06, 2015 6:30 pm
Forum: Beginners
Topic: frustration with monkmakes kit and code
Replies: 21
Views: 1959

Re: frustration with monkmakes kit and code

Thank you all for your helpful feedback.

The code is now pretty thoroughly commented.

https://github.com/simonmonk/pi_starter_kit

At some point, I'll follow up on some of the other suggestions too.

Si.
by Si.
Fri Mar 06, 2015 11:44 am
Forum: Beginners
Topic: frustration with monkmakes kit and code
Replies: 21
Views: 1959

Re: frustration with monkmakes kit and code

Hi Dougie, Your code would be better with some comments. Give an explanation of what that 939 "fudge factor" means, how you derived the value and what happens if you change it. That would make it a better learning resource, else all you've got is a wiring kit that the average 8 yr old can run but th...
by Si.
Fri Mar 06, 2015 11:12 am
Forum: Beginners
Topic: frustration with monkmakes kit and code
Replies: 21
Views: 1959

Re: frustration with monkmakes kit and code

I should also say that when you have problems with the projects, there is little point for looking for bugs in the code. Obviously I check everything and we have several thousand people who have the kit and lots of workshops where I've seen all the projects made and the code run fine. I'm sure the c...
by Si.
Fri Mar 06, 2015 11:06 am
Forum: Beginners
Topic: frustration with monkmakes kit and code
Replies: 21
Views: 1959

Re: frustration with monkmakes kit and code

Hi, Simon Monk here, I designed the kit, and I'm sorry you are finding it frustrating. It would be great if we could bundle in a book that taught you how all this works, but that would make the kit a lot more expensive. So, what you get is 10 cards with breadboard layout and little else. Its good th...
by Si.
Thu Jan 23, 2014 3:09 pm
Forum: General discussion
Topic: How do I connect something to the GPIO pins?
Replies: 33
Views: 9937

Re: How do I connect something to the GPIO pins?

Hi, I have some material about using the serial port in my "Raspberry Pi Cookbook". I also blogged a bit about using it to connect to an Arduino, here: http://www.doctormonk.com/2012/04/raspberry-pi-and-arduino.html Although this uses the USB port, the principal is the same (as is the Python). The e...
by Si.
Tue Jan 21, 2014 9:44 pm
Forum: General discussion
Topic: Electronics Starter Kit for a beginner with nothing
Replies: 17
Views: 15836

Re: Electronics Starter Kit for a beginner with nothing

MonkMakes has a breadboard-based starter kit for the Pi.

http://www.monkmakes.com/#!/~/product/c ... d=32645469

Image
by Si.
Sat Dec 14, 2013 10:13 am
Forum: For sale
Topic: Pi Leaf Packs for Sale
Replies: 0
Views: 2412

Pi Leaf Packs for Sale

If you want to use solderless breadboard with your Raspberry Pi, then a Pi Leaf makes it so much easier to work out which pin is which. http://www.monkmakes.com/wp-content/uploads/2013/12/leaf-on-a-pi-web.jpg http://images.ecwid.com/images/3994069/205391545.jpg These are for sale ready cut and drill...
by Si.
Wed Jul 31, 2013 3:25 pm
Forum: General discussion
Topic: Raspberry Pi vs. BeagleBone Black
Replies: 4
Views: 941

Re: Raspberry Pi vs. BeagleBone Black

Thanks for the kind words everyone.

Si.
by Si.
Wed Jul 31, 2013 12:18 pm
Forum: General discussion
Topic: Raspberry Pi vs. BeagleBone Black
Replies: 4
Views: 941

Raspberry Pi vs. BeagleBone Black

I have written a short comparison of these two boards.

http://www.doctormonk.com/2013/07/raspb ... black.html

Si
by Si.
Fri Apr 12, 2013 6:34 am
Forum: Automation, sensing and robotics
Topic: Robot
Replies: 16
Views: 3206

Re: Robot

The autostart mechanism I describe in the book only works if you have your Pi set to automatically boot on to the desktop. For an alternative, take a look at this dependency method - http://learn.adafruit.com/drive-a-16x2-lcd-directly-with-a-raspberry-pi/init-script At some point, I will update the ...
by Si.
Thu Apr 11, 2013 10:11 pm
Forum: Automation, sensing and robotics
Topic: Robot
Replies: 16
Views: 3206

Re: Robot

The example code is just on / off for the motors at the moment. Although its not so hard to add PWM. I am using 6 x AA (NiMh). The motors are supplied from the unregulated side (direct from batteries). The LDO regulator powers the Pi.
by Si.
Thu Apr 11, 2013 7:56 am
Forum: Automation, sensing and robotics
Topic: Robot
Replies: 16
Views: 3206

Re: Robot

Hi, Yes, as always, the Internet moves faster than publishing! The latest construction instructions, software setup instructions, tutorials, videos and the library itself can all be found on the Github Wiki that accompanies the Python library. Following http://www.raspirobot.com will now take you st...
by Si.
Sun Nov 04, 2012 7:38 pm
Forum: General discussion
Topic: New Book
Replies: 4
Views: 760

Re: New Book

Thanks Liz!

It was a lot of fun writing it. Its a great platform.

Si.
by Si.
Sun Nov 04, 2012 11:24 am
Forum: General discussion
Topic: New Book
Replies: 4
Views: 760

New Book

My new book 'Programming Raspberry Pi: Getting Started with Python' is now available in the US at Amazon.com. It should be out in the UK pretty soon. http://www.amazon.com/Programming-Raspberry-Pi-Getting-Started/dp/0071807837 http://www.raspberrypibook.com/_/rsrc/1346232781729/home/cover_amazon.jpg
by Si.
Thu Sep 20, 2012 7:48 pm
Forum: General discussion
Topic: I2C works on my old Pi but not on new one
Replies: 2
Views: 690

Re: I2C works on my old Pi but not on new one

Oh Good Grief - I expect thats it.

Many thanks, I'll go and look!

Si.
by Si.
Thu Sep 20, 2012 6:46 pm
Forum: General discussion
Topic: I2C works on my old Pi but not on new one
Replies: 2
Views: 690

I2C works on my old Pi but not on new one

Hi, I have one old Pi (no mounting holes) and one new one. Using the same SD card in the OLD one and doing: sudo modprobe i2c-dev sudo modprobe i2c-bcm2708 sudo i2cdetect -y 0 And my I2C device shows up in the list and works - great! If I swap the Pi for the new Pi. Same SD card, same hardware attac...
by Si.
Wed Aug 08, 2012 5:51 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C LED display writeup
Replies: 2
Views: 4292

I2C LED display writeup

I've got one of adafruit's I2C LED displays working with Raspberry Pi.

Full writeup and code here:

http://www.doctormonk.com/2012/08/led-c ... ry-pi.html

Image
by Si.
Tue Jun 12, 2012 6:48 pm
Forum: Python
Topic: Re: Slice of Pi and blink LED
Replies: 4
Views: 2993

Re: Slice of Pi and blink LED

Sorry - only just spotted this reply.

No the Slice sits with the bottom of the board about 5mm above the Pi, so no problem with shorts.
by Si.
Tue Jun 12, 2012 3:22 pm
Forum: Automation, sensing and robotics
Topic: Raspberry Pi and Wireless Sensor
Replies: 3
Views: 6688

Raspberry Pi and Wireless Sensor

A few weeks ago, I blogged about at a 'shield' that plugs into the Raspberry Pi's GPIO port called the 'Slice of Pi'. This very low cost board also includes an X-Bee shaped socket into which RF modules can be plugged. The company behind the 'Slice of Pi' (Ciseco) is also behind a useful and low-cost...
by Si.
Sat May 12, 2012 7:03 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Pi and Arduino
Replies: 24
Views: 10039

Re: Pi and Arduino

Great! I would love to meet up. I also hope to get out and see your museum some time while I'm over.

Maybe we should just try and meet up after Eben's talk. If its nice, then Pi / Arduino folk could just find somewhere at the venue to eat?

Si.
by Si.
Fri May 11, 2012 8:45 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Pi and Arduino
Replies: 24
Views: 10039

Re: Pi and Arduino

<t>Just wanted to say thanks for all the positive comments about the original post and if anyone is at the Bay Area Maker Faire next week, I'll be talking about Arduino in the Maker Shed on Sat at 7:30.<br/> <br/> I'll have my Pi there too and if I can sort out the AV I'll give a quick demo of Pi ta...
by Si.
Fri May 11, 2012 8:38 pm
Forum: Python
Topic: Re: Slice of Pi and blink LED
Replies: 4
Views: 2993

Re: Slice of Pi and blink LED

I have been playing with the 'Slice of Pi' board and driving an LED using the RPi.GPIO library in Python.

It works pretty well, full write up on my blog here
by Si.
Mon Apr 30, 2012 4:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Pi and Arduino
Replies: 24
Views: 10039

Re: Pi and Arduino

I have just got my Pi talking to an Arduino over USB using Python.

Full instructions on my blog here:

http://www.doctormonk.com/2012.....duino.html

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