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  1. M

    Re: Timed Beeper...need help!

    Hi, I'm trying to build this circuit in CirCad (all components are SM), it's almost imposible to get the PCB without errors ... it has to be short somewhere. My question: is there any automatic way to build the PCB in that program (CirCad)? Any suggestions please! Thanks in advance
  2. M

    Timed Beeper...need help!

    Hello, Can i use surface mounted capacitors instead of the two capacitors in this curcuit? http://www.electronics-lab.com/projects/oscillators_timers/008/index.html And what's the value of C2 ? is it nano, piko ...? and can i use a LED instead of the piezo sounder (just to indicate).
  3. M

    7 Segment LED Counter, Need help!

    Hello, I tried to simulate this circuit http://www.electronics-lab.com/projects/misc/012/index.html in Multisim, should pin 14 (count in) be connected to a 5V or GND or ...? Can you help me please  ;D
  4. M

    Harman

    Hi, Is "Harman Kardon" a swedish enterprise/company? I'm just curious to know...  ;D Thanks
  5. M

    6 speakers on 4-channels stereo!!

    Hi, Fig. A is a normal connenction of car stereo which has 4-channels. Can i connect like fig. B? What are the consequences, if there are? Can the stereo be overlaoded? Thanks in advance.
  6. M

    Samsung

    Hi, I've a digital sattelite reciever (samsung) which doesn't detect any signal... I'm sure that the dish is in right position (my other reciever is detecting signal and working normally at the same position of the dish). Do you think it's a physical wrong for eg (module or something like that)...
  7. M

    Bridge problem!

    Hi friends, Are TDA2005S and TDA2005M diffirent? I know S = Stereo and M = Mono, but can i for ex connect TDA2005S as a bridge? I did it but it didn't work !!  ??? The stereo one gives 2 x 10W and the mono gives 20W. Please help  ;D
  8. M

    Nokia 6352 Nicam

    Hi, I need to fix my TV NOKIA 6352 NICAM. The picture has a concave shape like this: I think i have to change a little capacitor in the module but the problem is i don't know where is it in the module  ??? so i need a schematic ... Do anyone have an idea about this problem and how to fix it...
  9. M

    85dB

    Hi friends, Can someone help me with some calculations please. A speaker has 85dB, how much is its effect in watt? Thanks
  10. M

    CD Drive

    Hi, A CD Drive needs +5V, GND & +12V to work. The pin which is marked +12V, how much tolerates it (max voltage)? I've tried with +14.4V, it works normally... Thanks
  11. M

    RMS

    Hi, A speaker marked with 80W RMS. What does RMS (Root Mean Square) means here? Thanks
  12. M

    Bridge Amplifier

    Hi everybody, Please can you help me guys if this amplifier can be bridged? This is its datasheet: http://www.datasheetcatalog.com/datasheets_pdf/T/D/A/1/TDA1521Q.shtml
  13. M

    Bass Box

    Hi guys  :) I want to make an amplifier for the bass box in my car (eg 100W). Can you recommend one of the circuits here, or you may have another one in another place  ;D Thanx
  14. M

    Field Effect Transistor

    Hi, How can I see if this effect transistor 2SK2605 works normally? should i test it just like the other transistors? you know a transistor has B C E , the 2SK2605 has Gate Drain Source. Help  ;D
  15. M

    Bass/Treble System

    Hi, I have a different question today  ;D. This is my speaker system in my car (the attachment), Did I connect the woofer in right way (speaker no. 1)? 1 = woofer 2 & 3 = 3-way speakers 4 & 5 = tweeters
  16. M

    Electronic Memory!

    Hi guys I've built an audio amp. to use in my car. The audio source is a (pc cd-rom) CD-player. They work pretty well together. I need a memory or something like that to keep what i'm listening to, for example:i'm listening to a song and the car is not started, when i get the car started, the...
  17. M

    Equalizer ...

    Hi everybody I need to build an equalizer ( with some diodes ) for my amp. Does anybody have a simple circuit ...  ;D
  18. M

    Limitation of current !!

    hi friends  :) I've built an audio amp ( I chose two projects , volume controller and power amp) and they work together pretty good but when I increase the volume (almost max) I hear very bad sound (distorsion). I've used many loudspeakers from the smallest to the largest but it is the same...
  19. M

    Which capacitor?

    Hi What kind of capacitors ( at the inputs 2&19 and 6&15 ) have to be used in this circuit: http://www.electronics-lab.com/projects/audio/039/index.html Are there for eg. ceramic, tantal ...?? ??? Help please ;D
  20. M

    Distortion

    Hi I've built preamp + amp : http://www.electronics-lab.com/projects/audio/039/index.html http://www.electronics-lab.com/projects/audio/006/index.html I've coupled them together and they work, but I get very high distortion when I increase the volume (when the bass is full ). My question is ...
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