CrazyEngineers Forum - Electrical & Electronics Engineering |
- RF Transmitter Receiver
- 3-D sonar mapping.
- Could graphene replace silicon?
- My invention of infinite electricity
- Blind audio guidance system
| Posted: 26 May 2011 02:43 AM PDT Hey all! I have just constructed a RF circuit to try out. I made use of the T5-434-5V and the R5-434-5-128 transmitter and receiver pair and also the HT12E and HT12D as the encoder and decoder for the transmitter and receiver respectively. The schemetic I used can be found on page 6 of this datasheet: http://www.spelektroniikka.fi/kuvat/T5R5-434-5V.pdf After following exactly, the circuit does not work. I connected the DOUT of the encoder and the DIN of the decoder directly and it works, which brings me to suspect it's the RF pair that's not working. HT12E oscillator resistance: 1M ohm HT12D oscillator resistance: 51K ohm If anyone has any idea as to why the transmitting and receiving isn't working, your comments would be greatly appreciated! Thanks! |
| Posted: 25 May 2011 10:58 PM PDT hi everyone:) have you guys watch batman? there was a really cool invention they have. It uses sonar pulse on a phone and it can then 3d map a building. i was wondering if this is possible??? Thanks EE nano |
| Could graphene replace silicon? Posted: 25 May 2011 11:07 AM PDT Scientists at the University of South Florida (USF) have created an anomaly that could allow graphene to eventually replace silicon as the primary material in electronic devices. Indeed, previous attempts at creating anomalies proved inconsistent and produced samples in which only the edges of thin strips of graphene or graphene nanoribbons contained a useful defect structure.  However, the USF team developed a method of producing a well-defined, extended defect several atoms across which contains octagonal and pentagonal carbon rings embedded in a perfect graphene sheet. According to PhysOrg, the defect functions as a quasi, one-dimensional metallic wire that conducts electric current and can be used as metallic interconnects or elements of device structures of all-carbon, atomic-scale electronics. To create the anomaly, the team used the self-organizing properties of a single-crystal nickel substrate, along with a metallic surface as a scaffold to synthesize two graphene half-sheets. When the two halves merged, they naturally formed an extended line defect with a well-defined, periodic atomic structure and metallic properties within the narrow strip along the defect. "This tiny wire could have a big impact on the future of computer chips and the myriad of devices that use them. In the late 20th century, computer engineers described a phenomenon called Moore's Law, which holds that the number of transistors that can be affordably built into a computer processor doubles roughly every two years," explained PhysOrg. "This law has proven correct and society has been reaping the benefits as computers become faster, smaller and cheaper. In recent years, however, some physicists and engineers have come to believe that without new breakthroughs in new materials, we may soon reach the end of Moore's Law. [But] Metallic wires in graphene may help to sustain the rate of microprocessor technology predicted by Moore's Law well into the future." Cheers mates, |
| My invention of infinite electricity Posted: 25 May 2011 03:22 AM PDT Hi guys, one day before sleeping i was thinking of all sorts of methods i could use to generate electricity and i came across this it happens that you take an eliptical coil mounted n a rod with a ball and socket joint a magnet covered by rubber so that it come to the shape of a ball we set up a mechanism so that when the ball revolves around the center continuously in the coil it will generate 1 W every revolution cool na 1MW every day it about the size of a persons head:D |
| Posted: 25 May 2011 03:07 AM PDT Genius here,i need your help seriously. My supervisor want me to take "blind audio guidance system"as my final year project.But it involves a lot of thing that i don't know.Do you guys know about this system?i need your knowledge. This is a link about what kind of degree i'm taking: SOT : Programmes - Electronic Engineering |
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