GM,
    I thought I saw somewhere that you had been attending 'noise nights' so I would expect you of all people to be flexible on the definition of 'sound good'.

   I am not sure that a standalone Arduino has the horsepower to really make practical use of 16bit PWM anyway - much bigger wave tables, more number crunching, more memory reads/writes  etc.

   Lets see if anyone comes up with a interesting working synth based on this.

Duane B

No it is not. 1mS is 1000uS. This is not binary measurements.

That link reminded me of marking a student essay, basically most of it is right, but often the wrong words are used and some of the fundamental understanding is wrong.
For example the 74HC14s are external buffers they are not switches. He talks about output resistance when he means impedance and says PWM is basically AM, which it is not. He talks about a negitave output where he means a 180 degree phase shift. He also seems obsessed with distortion said it were the only measure of quality.

There is no mention of monoticity which is the basic thing you need to preserve in any D/A conversion.

But does it sound good ?

A lot of people have been excited by/reposting this link, but has anyone used or seen it used as part of a synth yet ?

Duane B

Hi,

Depending on the RC Technology you are using, there is also a degree of variation from the transmitter/receiver

http://rcarduino.blogspot.ae/2012/03/reading-from-rc-reveiver-do-you-need.html

Duane B

rcarduino.blogspot.com

Your question should be the other way around - its probably easier to move the servo library to another timer than it is to move onewire.

Are you using a mega ? If so I will have a look at supporting timers other than timer1 in the following library

http://rcarduino.blogspot.ae/2012/11/how-to-read-rc-channels-rcarduinofastlib.html


Duane B

rcarduino.blogspot.com

Try this way -

http://rcarduino.blogspot.com/2012/09/how-to-view-arduino-assembly.html

Let me know if it works for you

Duane B

rcarduino.blogspot.com

The real answer is resolution.

If you want to have 16 bit PWM, you need to be able to count to 65335 very fast, the speed at which you can do this gives you the PWM Frequency for the given resolution -

An Arduino UNO can do 8-bit PWM (16,000,000/255) at 62,745 Hz, which is well outside the audio spectrum.

At 16 Bits (16,000,000/65535), this drops to 244 Hz well inside the audio spectrum and therefore not a practical solution for most applications.

Duane B

rcarduino.blogspot.com

There is also this interrupt based approach -

http://rcarduino.blogspot.ae/2012/01/how-to-read-rc-receiver-with.html

Duane B

rcarduino.blogspot.com

There was a nice clock project recently where the entire interface was based around rotating a cube. It was also based on an accelerometer, the cube was actually a bamboo toothbrush holder, it looked great. You might find the details if you search around in the exhibition section.

Duane B
rcarduino.blogspot.com

I don't find the idea too stupid.

I would not worry about that, very few of the things we put our efforts into around here make sense from an outside perspective.

Let us know how you get on and do you have any pictures of the bike ?

Duane B

rcarduino.blogspot.com

Isn't this a blind alley, it will only allow you to control a single channel, whereas analogWrite will give you upto six channels on an UNO, more on a mega.

Duane B

rcarduino.blogspot.com

Lots of interrupt based approaches here including explanations of what the code does and why if your interested in taking an interrupt based approach in the future -

Scroll down to the interfacing with RC section -
http://rcarduino.blogspot.ae/p/project-index.html

Duane B

Hi,
   I build lots of standalone Arduinos on strip board, it is cheaper but also makes routing connecting wires very simple if everything is already sharing the same power and ground.

   You can also look at using ATMega8 and ATMEga168 chips, they have less memory but might be available for a lot less than 328s.

   As for boot loaders, its easy to use optloader to put opti boot on any of the 8,168 and 328

Duane B

rcarduino.blogspot.com

lots of them out there by the looks of it -

http://en.wikipedia.org/wiki/Electronic_gear-shifting_system

Duane B

Dont Shimano already make electrically operated shifters ?

I know that they have been used in racing in the past.

Duane B
rcarduino.blogspot.com

http://www.fastcodesign.com/1672262/watch-a-hidden-camera-captures-a-packages-hidden-journey#1

Duane B