Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Re: Need help with 38khz Oscillator
can i ask? can i use Inkjet to design a pcb layout or need laser printer? i am using Old way of designing pcb i am using Masking tape and cutter blade to design a layout on pcb.:-D:-D. i have only inkjet printer!!
Re: Need help with 38khz Oscillator
Sir betwixt CD4001 not CD4011!!:???::-D thanks!! there is trimmer resistor for the 19khz it can reduce the pilot tone!!
thanks again
Re: Need help with 38khz Oscillator
what value of RC filter in 19khz and the value of rc filter in 38khz?
example
frequency = 19khz
R = 100k
C = 82pf
- - - Updated - - -
this is simulated using LM324!
the Oscilloscope - XSC2 - is the output of 1khz Audio modulated to 38khz carrier!
the...
Re: Need help with 38khz Oscillator
thanks!! i am not familiar to those filter mostly in khz range, but in rf 50Mhz to 300Mhz maybe!! what i use to filter the harmonic, LC or RC? I am not try to design a filter in khz range using LC because i dont know how to make a coil in range of mH i am not...
Re: Need help with 38khz Oscillator
What is your simulator? i am using multisim 13!! i want to share my project stereo coder to help me improve this coder!! i have no experience about designing a ckt!! so im sure is something wrong to my ckt, i want to check it to a professional like you!! i do...
Re: Need help about 38khz Oscillator
this screenshot was taken from two different Osc. CD4011 and CD4069, this is 1khz audio modulated to 38khz carrier from CD4066 pin# 2 and pin#3 using Oscilloscope.
The p-p voltage from CD4066 using CD4069 osc is higher than CD4011!!
which is much better...
Re: Need help about 38khz Oscillator
here is my 2 stereo coder schematic diagram
using 38khz
using 456khz
Please tell me if there is wrong to my schematic diagram!!
thanks!!
- - - Updated - - -
what is the common p-p voltage output on 19khz pilot? 1v p-p is too high?
- - - Updated - -...
Re: Need help about 38khz Oscillator
thank you betwixt!! i have two version of schematic first is using 38khz and the other is using 456khz! i will post the picture tomorrow to analyze and if you or they have any suggestion please let me know to make it good!!
i am going to sleep its been 11pm...
Re: Need help about 38khz Oscillator
As you said this is true at almost basic stereo coder that there is no 38khz output? only 19khz output?
- - - Updated - - -
Only 19khz pilot is available in the output here is the spectrum analyzer
is it true to all basic stereo coder that there is no...
Re: Need help about 38khz Oscillator
I have found 456khz on my old radio here is similar **broken link removed**
can i use it to oscillate or it is filter only and cannot oscillate?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
