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well i saw a TV prog a year or so ago some inventer was experimenting with lasers and acidently burned a patch of hairs off is hand. years/months later he relized that this was a great invention. But really how is it to knock up a laser hair removal sys in the garden shed.
basically been...
i have an elektret microphone that only produces tiny voltages with a max impedence of 1.5k. i need to filter this with a bandpass filter. then amplify this so i can input it into my adcPIC or CVSD. i am also having problems with my ISIS simulation of the mic- ie i can`t get it to work...
anyone now where to find proteus5.2 cra*kz?
Ok i know there are loads of student licenced software and being a student thats great but they do limit the prog so any suggestions and what about getting a free version of picbasic & picbasic pro??
i like Pspsice and Proteus
Ok i know that i cannot use Manchester coding but it is possible to do that why i need to use a compressive encoding technique for example GSM( there are alot). also there are alot of these digital walkie talkies on the market and these will have limited bandwidth due to goverment regulations...
my 433MHz walkie-talkie project summary:
re RF project thread: **broken link removed**
after reading/researching and your help i know the following.
I need a anti-alising filter after the mic to prevent spectral repetitons. i have decided to go for a 5 or 7 order chebyshev with a .5 db...
ok im going back to basics.
design plan.
i will first get speech sent via a RS232 wire link to a speaker. using a ADC pic and a DAC pic.
then i will encode some kind of error checking and parity stop bits. before finally adding the FM modules.
i will be researching the pic family for pic...
i know im going round in circles, but if been doing that for 3 months. the more i go round the more i learn.
i have printed out the articles and read them all, i have increased my knowledge alot but im still having problems as you can tell by the number of replys by me. all the code i have...
this is what my DSP lecturer had to say:
Steve, Hi.
Anti-alias is a good low-pass filter at 4kHz. Chebyshev has quite a steep
roll-off; look in "The Art of Electronics" for designs.
The PIC should have an ADC on board. All you have to do then is to take the
8 data bits and send them out...
can`t find the Lanwve company??
Also stilll none the wiser about programming dsp pics. im off to ask a DSP lecturer in an hour so ill tell you all what he says.
looked on the motorola site and found: which has some good info and as third party code. i just don`t understand the code...
ok i saw the programming but did not understand it? know of any tutorials that could give me an understanding of what to do.
his program runs off the PIC 12C509 which i have used before(chipping my c12 phone and PS2) but as i don`t understand his code and the fact that his transmitted data...
DSP probs
been reading up in my books but can`t find anything about the application of code. know all about what the different codes do but i need to be able to program this onto a pic?? looked for hours. please help me.
any advice on the programming of code would be greatful
Basically my degree is telecomms and computing. i have covered most topics but of late the degree has been on computing. i find that i forget what i have learnt very easily. i am reading my notes on modulation but u see the degree is alot of theory with little practical work. so allthough i...
how dumb must you lot think i am:)
i know this:
The output from your DAC will be a staircase waveform, the LPF removes the fast edges and restores the signal
It just completely slipped my mind, thanks though for getting my brain up and runnning again.
those links are good, them modules are...
i know about compression, manchesterd and NRZ encoding but how can i implement this into the circuit. i have been looking for cheap dsp chips. i would like to program a pic which would be cheaper and look better in my report. programmed in C then saved to hex i believe so if somebody has any...
then look at DS305(sorry if this takes awhilt the link is low i know. i think i have underestimated this task.
microprocessor? you mean i need to program a pic? could you please explain more on the parity bits, stop and start stuff.
i have done some stuff on compression so ill go home and...
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