Recent content by nanopoylos

  1. nanopoylos

    ACTIVE AUDIO FILTER

    well not all work with pic's some work with resistors but you are right , i did something wrong please tell me what to buy from maxim to build a stereo active xover 3 way , or 2 way or some links thnx
  2. nanopoylos

    ACTIVE AUDIO FILTER

    hello guys i wanted to make an active filter for my car nothing special no need to be adjustable , no need to have more gain , my car r/cd is 4 volts preout i found some very interesting chips in maxim active filters with programmable q,f0,anything i bought some ic's from maxim...
  3. nanopoylos

    RMS

    my digital multimeter is a true rms meter when i am measuring a signal 1khz 1Vpp , it does not show me the peak value , but the rms value is there any way to read the peak value? (even with the max feature on , it shows me the max RMS value , not the peak value) another problem is that with my...
  4. nanopoylos

    digitan multimeter software

    hi , i am looking for software for my protec 506 rs232 multimeter does anyone know where to find any? the stock software is very poor please help me thank you
  5. nanopoylos

    A VERY usefull circuit , but how...

    thank you for replying actualy i think tha t you both are right GPG is right cause what i saw was on a mixing deck , and not a power amp Audioguru is right too for the problems he said that tis project has anyway , what can we do to make the project? i think the solution of the 3 leds was...
  6. nanopoylos

    A VERY usefull circuit , but how...

    Thank you for replying as for the project i cant understand the diference between a project for an power amp and a project for a mixing console as you say they are not the same well , i set the gains for my amp with an osciloscope , so the inputs are not clipping for sure but what about the...
  7. nanopoylos

    My 120 Watts Power Inverter

    Guys congratulations for the project i only want to see the whole project with all the adjustments you made i mean the replies ended and if someone wants to build the circuit , he must read the whole article and fix the things that must be changed resend the final version with schematic THANK...
  8. nanopoylos

    A VERY usefull circuit , but how...

    I was on a studio , and i saw a 32 channels console for recording. I noticed on EACH channel 3 leds A yellow , that showed PRESENT of signal (guess -20dB) A green that showed 0 dB signal A red (non adjustable !?) that showed distorsion , clipping So , i think , if this console has 32 circuits...
  9. nanopoylos

    Acoustic Generator

    Thanks for replying Actually it is a function generatos with max frequency 2MHz I tied the TTl output in my osciloscope and i found a +4Volt signal (the dc offset doesent work in TTL output) I really cant understand where to use this signal If someone knows please tell me Now ,about the dc...
  10. nanopoylos

    Acoustic Generator

    Hi friends a very simple problem. i use a acoustic generator and i do not have the manual My generator has 1 input and 2 outputs in BNC The one output is called TTL out .WHAT IS THIS??? How does it works? The second output is the 50Ohm output. 50 ohms is its internal resistance? The input is...
  11. nanopoylos

    MEASURING THD& on pc

    ok so i must measure the thd% of the amplified output with 4 ohms load . How should i do this?? i mean , if i connect to the output the load , where should i connect the measuring cables and where the attenuator circiut? Do i still need the attenuator circuit? What about the preouts? do they...
  12. nanopoylos

    Pc controled fluid selector

    HI I would like to construct a device wich will have a motor,20 inputs of fluids and an output. The pc will have a programm to tell to the device wich fluid must be connected to the output each time and for how long. The selector will be in circle shape , on the one side the inputs , in the...
  13. nanopoylos

    MEASURING THD& on pc

    Thnx for repluing i do not something strange to attenuate the signal . My car cd player has amplified outputs and preouts. The outputs are 5volts maximum , with no amplification The amplified outputs deliver 17 watts rms at 4 ohms So, i guessed that this ratings are to much for my sound card to...
  14. nanopoylos

    MEASURING THD& on pc

    HI I would like to measure thd% on my pc. I use spectra plus software . If i use a low watt device, there is no problem . When i use my car cd-player , the output is 17 watts rms. So i guessed , i should protect my sound car from frying, and i used an attenuator 20db . Now the question is, when...
  15. nanopoylos

    Power supply for AMP in CAR

    HI THERE. we all know that we can build amps for home use . I would like to construct an amp for use in my car , with 12V supply . Inorder to achieve many Watts , we should raise the voltage of the car battery to 40 or ever 70 volts . As i know we should use a power converter . I would like to...
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