Search results

  1. Sukhbinder

    EPSON EPM-4207 motor wiring connections

    i need the wiring code for an EPSON EPM-4207 stepper motor. it is a 6 wire bipolar motor with 1.8 degree step. i found using goggle that it is epson stepper motor used in a its printers. it has 6 wires in 2 groups. one group has a brown,red and white wire, and the other has a brown,orange and...
  2. Sukhbinder

    Is bluetooth safe?

    I agree with u Trigger, the effect of RF on human's health is still not determined. with the advancement of technology, most RF communication systems are moving to the higher frequencies as they provide u with higher bandwidths. i bought a panasonic cordless phone a few days back ans even that...
  3. Sukhbinder

    Is bluetooth safe?

    i agree with u guys that until there is enough data one cannot predict any thing. Bluetooth is surely the thing today, u have bluetooth applications not only for mobiles but even for computers like bluetooth enabled printers and even i home audio u have bluetooth headphones which can be hooked...
  4. Sukhbinder

    MODFET and HBT

    what about an IGBJT (Insulated Gate Bipolar Junction Transistor) it has the input stage of a Mosfet and the output if a BJT. so u get the high input impedance of a MOS and lower working voltages and high working temperatures of a BJT
  5. Sukhbinder

    doubt on mosfet symbols

    a N channel mosfet does not have any holes ( all FET and Mosfets are unipolar devices).
  6. Sukhbinder

    can any one explain zener breakdown using energy band diagrams?

    zener breakdown only occurs in zener diodes with a volatge below 5-6V. above which avalanche breakdown occurs. zener beakdown occurs in highly doped semiconductor junctions where the depletion region with is very small. the breakdown occurs due to high electric field across the depletion region...
  7. Sukhbinder

    how to design very small 6V power supply @100mA

    if u r going to open up a mobile phone charger i suggest u use it for the power supply u need. most cell phone chargers can provide u with a voltage of 6-7V @500mA, which will be quite enough for ur demands. u could use normal rectifier diodes to drop the excess voltage by connecting them in...
  8. Sukhbinder

    Capstan Motor

    Hi Morpheus,                     the ic u r looking for is most probably made by sanyo japan. u can check for it on the sanyo website, u can find a description for it but i doubt that u'll find the datasheet. it happens that certain components that are for OEM use donot have the datasheets...
  9. Sukhbinder

    Is bluetooth safe?

    A point worth  thinking is that they say that cell phone radiation is harmfull for health (still a debatable topic) but what about bluetooth technology. they are advertiseing for use of bluetooth accesories like headsets for phones but do you know that bluetooth uses the spectrum of 2.4Ghz...
  10. Sukhbinder

    shake light

    i agree with audioguru., these shake lights are all gimicks. i got one and when i took it apart i found 2 3V coin cells in it that powered the LED. even if they used a rechargable type battery as the power source they would need atleast a 3.6V battery to power a white led. to charge the battery...
  11. Sukhbinder

    Surround Sound for car audio

    how about using some delay line circuits if u can handle them.  thers are some ICs like TDA1022,SAD512,SAD512D,MN3004,SAD1024A,TDA1097,MN3011 and SAD4096. u cn produce popular effects like echo, reverb, chorus ans phasing. these are CCD audio delay line circuits. u can try them out if u like.
  12. Sukhbinder

    Surround Sound for car audio

    U could use a NJM2702 3D surround audio processor from New Japan Radio Corporation (NJRC). however u'll need to connect the line out of ur car stereo to the surround processor input an u'll need to connect an amp to processor output to drive the rear speakers. so you need more hardware. u can...
  13. Sukhbinder

    CD-RW

    try reading some earlier discs. see if reads an original disc i.e. that was not made in a cd writer. try some audio cds also. have u tried cleaning the lens? if the writer is under warranty use a lens cleaner cd (though they don't work too well). still no response i suggest u take it to the...
  14. Sukhbinder

    difference b/w high frequency & transformer based inverters

    thanks guys for all ur suggestions. i'm  planning to get one inverter for my home, so space and weight are not much concern here. high freq inverters are surely compact in size and are more suited to portable use like for camping. also they have limited surge capacities i.e. they cannot take a...
  15. Sukhbinder

    difference b/w high frequency & transformer based inverters

    what happened guys no replies. i just wanted to know that can a hugh freq inverter drive normal transformer based power supplies correctly. generally all appliances are rated at 50/60Hz. SMPS based systems may not have a problem but what about normal TV sets which generally use the line volatge...
  16. Sukhbinder

    difference b/w high frequency & transformer based inverters

    what is the difference between a high frequency and a transfomer based inverter. i read some where that transformer based systems have a load surge capacity of upto 200% but a high frequency system cannot exceed its surge capacity specified. i know  that by using a high frequency allows the use...
  17. Sukhbinder

    DC Motors

    Hi siddharth, seems u are a bit confused with the lm317 u need. u require an LM317T (the T prefix specifies that the device has a current rating of 1.5A). a normal LM317 has a rating of 1A. Since these devices are in the TO-220 package they can be easily heat sinked. but still u cannot get a...
  18. Sukhbinder

    CRITISIZE THESE CIRCUITS

    i suggest u use the 7555 (the cmos equivalent of the 555). i happens that when a 555 switches states, it produces a surge of about 400mA which can easily upset the timimg for the other digital circuit elements, while a 7555 has a surge of just 10mA. i yself have been woking on this circuit and...
  19. Sukhbinder

    power on reset for digital circuits

    Thanx ;)
  20. Sukhbinder

    power on reset for digital circuits

    Any thing that will work for both. I know about the working voltages for both TTL and CMOS but i still have to decide which type to use depending on their availability thanx ;)
Top