Search found 996 matches
- Thu 31 Dec 31 2009 3:44 pm
- Forum: Projects
- Topic: FFT Audio Spectrum Analysis
- Replies: 11
- Views: 40528
Re: FFT Audio Spectrum Analysis
I had to add a heatsink on the 7805 regulator when running off the 12V wall-wart because it was overheating and experiencing thermal shutdown, which corrupted the data. The sensor was also moved off the board on a 6-inch tether to provide better thermal isolation. The nett effect of the latest modif...
- Mon 28 Dec 28 2009 12:52 am
- Forum: Space Balloon Project
- Topic: Useful references of past projects
- Replies: 7
- Views: 58644
- Mon 28 Dec 28 2009 12:29 am
- Forum: Space Balloon Project
- Topic: Useful references of past projects
- Replies: 7
- Views: 58644
Useful references of past projects
http://www.youtube.com/watch?v=xWATd0LRA_4 http://www.telegraph.co.uk/news/newstopics/howaboutthat/5005022/Teens-capture-images-of-space-with-56-camera-and-balloon.html http://www.natrium42.com/halo/flight2/ http://www.hobbyspace.com/NearSpace/index.html http://www.wired.com/science/discoveries/news...
- Thu 24 Dec 24 2009 9:53 am
- Forum: Projects
- Topic: FFT Audio Spectrum Analysis
- Replies: 11
- Views: 40528
Re: FFT Audio Spectrum Analysis
I have tweaked the VFD I2C routines as best as I can and they're still too slow for a real-time full-screen update. It looks like I'm going to have to find a faster type of display. In the meantime, the weather has turned wet and it was rather chilly two nights ago, which left me wondering exactly h...
- Mon 14 Dec 14 2009 9:43 am
- Forum: Projects
- Topic: Battery Performance Tester
- Replies: 56
- Views: 119805
Re: Battery Performance Tester
The following chart includes the Energizer Lithium e2 and a Carbon-Manganese dry cell (First Choice Extra Heavy Duty) to give some perspective:- batttest.jpg Battery-Capacities.jpg In terms of value for money, the following chart gives you the amount of power you get for each SGD (Singapore dollar):...
- Mon 14 Dec 14 2009 2:07 am
- Forum: Projects
- Topic: Battery Performance Tester
- Replies: 56
- Views: 119805
Re: Battery Performance Tester
Discharge curves as follows:- Alkaline-discharge.jpg From this chart we can see that the Panasonic EVOLTA has the highest discharge capability, along with the Panasonic "Digital" alkaline. The Energizer e2 is slightly lower but sustains the discharge for a longer period. Duracell is except...
- Mon 14 Dec 14 2009 12:49 am
- Forum: Projects
- Topic: Battery Performance Tester
- Replies: 56
- Views: 119805
Capacity results
The capacities of the batteries tested so far are as follows. These are the pure power capacities.
Daniel- Sun 13 Dec 13 2009 11:58 pm
- Forum: Projects
- Topic: Battery Performance Tester
- Replies: 56
- Views: 119805
Re: Battery Performance Tester
At long last, I've finally gotten down to actually testing the batteries. For the sake of absolute consistency, I am testing them all on channel 1 so it's taking longer than if I were to press all four or even five channels into use. In any case I am starting with all the non-renewable cells picture...
- Wed 18 Nov 18 2009 4:20 am
- Forum: Projects
- Topic: OSD Comparison Chart
- Replies: 0
- Views: 15927
OSD Comparison Chart
http://spreadsheets.google.com/pub?key= ... utput=html
Please inform me if there's any information you have that I am missing or that I got wrong. Thanks.
Daniel
Please inform me if there's any information you have that I am missing or that I got wrong. Thanks.
Daniel
- Thu 05 Nov 05 2009 7:02 pm
- Forum: Projects
- Topic: FFT Audio Spectrum Analysis
- Replies: 11
- Views: 40528
Re: FFT Audio Spectrum Analysis
I've got the skeletal code going and I2C communications with the VFD is working. Unfortunately, it is starting to look like the render rate is rather slower than I like it to be. This is going to require more exploration:-
Daniel