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  1. V

    DIN5 F to miniDIN 6 converter

    Dears, Could you please guide me how to convert DIN 5 Female to miniDIN 6 male? (For computer keyboard purpose) Thanks, V
  2. V

    Microphone Amplifier

    I got some information on XLR pin mics. I think there is one "Normal polarity" and another "inverted Polarity" Should I use these like: normal to "non-inverting" and inverted to "inverting" ends of an OP amp? Regards, V
  3. V

    Microphone Amplifier

    Thanks Audioguru. But this mic has 3 pins. What are those? The circuits I saw were the ose with 2-pin inputs. Please help.
  4. V

    Microphone Amplifier

    Dears, I need to construct an amplifier for the Shure SM58 mic. The impedance is 150 ohms. Please help. Regards, V
  5. V

    Gain control

    Dears, I am making an op-amp driven audio-amplifier. For the input gain control, I used a pot. This actually cuts some of the frequencies of audio and creates a distortion. Please guide me how best I could make a gain control Regards, V
  6. V

    UPS & Inverter

    thanks audioguru. For fans and tubelights, do the inverter with 4047 suit? Do we need a special transformer for square wave (by 4047)? or the would normal be sufficient? Regards, V
  7. V

    UPS & Inverter

    Dears, For house lighting purposes(assuming tubelights and Fans) which would be a good choice? 1. Sine-wave UPS 2. Square wave UPS And what is the difference between UPS & inverter? Regards, V
  8. V

    What is this IC used for?

    Dears, I saw an IC "SG3524N" (from TI), in a 20' back-up computer UPS system. The data sheet says it is a pwm IC. But, could it be used for generating AC out of DC? (Col1&2s) Regards, Vivekanand
  9. V

    DC to AC

    Ok.... Well; Do these fluorescent lights are normal fluorescent (220VAC with a choke coil) lamps? are some special creatures?
  10. V

    DC to AC

    I have gone through that; mp. I must say that was a good model ofcourse. But to be more specific, I have raised this question only to know construct an inverter (DC to AC) with a cheap and best technique. Also, at the times, I wanted to know about different techniques employed in the said...
  11. V

    DC to AC

    Ok...MP. Then can you briefly explain what is the design technology of a simple 500VA-1kVA lighting purpose inverter? I have heard about using a microcontroller in inverters. But I suppose the above one doesn't use it.
  12. V

    DC to AC

    Dear MP.... What is the technique to generate a set of sinewaves (of opp phase)? Is it the regular oscillator?
  13. V

    DC to AC

    Ok... In the cited design of an inverter, you have used LM358 and then the output is fed to one darlington pair and subsequent transistors. Instead, if I use a series of op-amps like LM358s, then does it work that way? If I want to use the MOSFETs, then what are suitable substitutes?
  14. V

    DC to AC

    Ok..... What is the maximum input(DCV) and output (ACV) voltage and amperage of this 4047? What is the exact "design difference" between of UPS and an inverter?
  15. V

    DC to AC

    I got it.. Really I was confused with monostable of 555. Is the 4047 the only wat to make it? I mean are there any other techniques to produce AC, using transistors, etc.?
  16. V

    DC to AC

    Ok... For a general purpose lighting inverter, is the model with IC NE555 be useful? The technique will be: IC 555--->Square Wave AC---->Amplify------>Transformer---->output. Will it work this way? Which one do you prefer, 12-0-12 to 220-0 (backwards) or 0-12 to 220-0...
  17. V

    DC to AC

    i.e. 4047 produces 2 square wave ACs and you are amplifying it by op-amps and further by set of transistors. and finally feeding it to a 12-0-12 to 220-0 transformer. My question : Is there any IC which produces sinewave signals (2 sets opposite in phase to each other)? What is the difference...
  18. V

    DC to AC

    Dears, What is the usual technique employed in converting the DC to AC (50Hz); as in case of a simple voltage AC inverter. Vivekanand
  19. V

    5A regulated power supply

    Dears, I want to make a regulated power supply (9-25V @ 5A) Please let me know which IC should be used for this. (Like we how we use LM317 IC)
  20. V

    A project, help

    How about this ckt?
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