27/12/2013
There are so many devices available
which can record and playback voice.
Most of the digital devices like mobile
phones can use the SD card to record the
voice
signals
and
playback.
This
project
demonstrates
how to
record voice signals on a micro SD card
and play it back using the GR SAKURA
board. Voice signals are continuous
analog signals and the digital devices like
microcontrollers cannot handle the
continuous analog signals. Most of the
microcontrollers have an ADC module
which can do analog to digital
conversion.
The microcontroller uses sampling
technique to convert the continuous
analog signals to discrete digital
equivalent samples. While recording the
voice, the GR SAKURA board samples the
voice signals and writes the sampled
values to a file at the sampling time
itself. The same file is opened again and
reads the values at the same frequency
at which they are sampled.
13/12/2013
Experimental circuit boards can be easily made with a 3D printer. They can be made at the same size and thickness as a standard 1/16" thick, through-hole soldered, perfboard.
The components can be fairly easily connected together without using solder.
This technique is somewhat faster than standard etched and soldered circuit boards. But it does require some skill and attention to detail to create a reliable circuit.
This example circuit board is a simple micro controller circuit that flashes three LED's in sequence.
It is intended to be a minimal illustration of what is possible...
06/10/2013
Now Super computing for everyone with parallela board
Spec are as follow
Zynq-7000 Series Dual-core ARM A9 CPU (Z-7010 or Z-7020)
16 or 64-core Epiphany Multicore Accelerator
1GB RAM
MicroSD Card
2x USB 2.0
4 general purpose expansion connectors
10/100/1000 Ethernet
HDMI port
21/08/2013
Arduino Controlled Solar Fountain
A fountain can make a nice decorative fixture for your garden. But it isn't always easy to run a power cord out to where you want it. So I decided to run it on solar power. The system is controlled by an Arduino. This allows you to save energy by programming when the fountain will be turned on.
18/07/2013
7 reasons Your Circuit Isn't Working...
1. Bad Connection Or No Connection
2. Wrong Connection
3. Noise In The Circuit Or Near It
4. Bad Power Supply
5. Overheating
6. Wrong Design Assumptions
7. Bad Components
http://www.instructables.com/id/7-reasons-Your-Circuit-Isnt-Working/
13/07/2013
Paper Clip Connectors :
If you need some quick and cheap connectors for a project i found that paper clips work good. They are really cheap and they slide together and come apart really easily.
For my connectors i went and soldered the wire to them but you could also twist the wire onto it good and then cover it with hot glue
to connect the paper clips together just slide them together on the open end, you now have a good connection
If you need connectors that are insulated you can use paper clips that have a coating on them and just scrape off the coating on the sections that would make contact.
Hope everyone finds this useful...
18/07/2013
17/07/2013
13/07/2013
12/07/2013