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  1. M

    what should i do about computer rf emissions?

    Hi Take radio to a better location not in in vicinity of TV or computer or any device using SMPS and crystal oscillators.
  2. M

    Could somone tell me what this is?

    Hi This is rightly said to be a mutual inductance demo kit
  3. M

    Need advice on equivalent transistors of: SL100 and BC158A

    Hi HERCULES welcome BC158A cPNP transistorv an be substituted by 2n2907A taking care of the pin differences SL100 is a medium power device, and if from india, you get CL100, BEL100N otherwise, you may perhpas try BD115
  4. M

    0-30 Vdc Stabilized Power Supply

    congrats please post a photo of the pcb assembled by you as .jpg
  5. M

    What shottcky diode do I use?

    the voltage drop across highspeed diode is more than that of a schottky diode the working voltage ,if it is less , we will be adding further voltage drop, thereby reducing the voltage to the actual load. that is why perhaps they prefer to yuse schottky device.
  6. M

    What shottcky diode do I use?

    Hi you could use  say IN5819 series.
  7. M

    Electronic Stethoscope 2

    Hi Recently I saw one circuit of steth with pizio buzzer element (two tagged) as sensing element.
  8. M

    Need RF transceivers in PDIP or DIP

    Hi try www.sunrom.com they offer STT and STR 433 a set . in Indian Rupees and at $ rates aswell
  9. M

    ATTENTION: Illegal content (ebook/magazines/software) will be deleted

    Hi all let us honour the rules of the site and also protect the MAGs' rightseven-- afterall it will cost us few bucks prchase-- imagine a robbery inour own homes??? pity
  10. M

    For fun - What is your degree?

    Hi even for FUn to expect reply from 25000 appox  membership -- think of what are you expecting  from this form with HUGE membership-- an impossible task and this site will be filled up for nothing but so called fun-- good  i am also on  power electronics while worked for telecom.--
  11. M

    Psophometer Level Meter

    Hi cynicmonster welcome please download and see this pdf  you will surely be enlightened www.audioprecision.com/bin/AMH-1.pdf check for psophometric weighing etc
  12. M

    free energy motor

    Hi Indulis i had recently visited an enrgy saving exhibition at Hyderabd, wherein M/s NMDC (national minaral development corporation), participated --which enthused me to probe their participation cause-- they have apeculiar cituation and use it to regenerate power and they gave a brouchre...
  13. M

    Help required with switching problem

    Hi try IR LED and Photo tranasistor on either side to sense the car passing thro breaks the light path --use thr Transistor outputs to trigger set / reset flip flop -the output could drive a relay with change over contacts to reverse the power to the motor
  14. M

    Electronics kits...

    Hi audioguru is right in saying not make CHEAP kits. in general many kits are costly perhaps due to limited volumes sold, as compared to finished products. members prestigeous fourms like e-lab.com shold comeforward to be able design and realise instead of ckd or skd assembly. Here also, as...
  15. M

    Frequency Division

    Hi such nice info (thanks Hotwaterwizard)  i do recollect my training days. perhaps the clock being 4MHz, even CD40 series (CMOS)can work and with llower power consumption. ofcourse the proper pin outs shold be followed. sarma
  16. M

    CRT monitor pinouts

    PLEASE TRY THIS Color VGA Adapter Pin# Label Function 1 RED Red color signal 2 GREEN Green color signal 3 BLUE Blue color signal 4 ID2 Monitor identification bit 2 5 N.C. Not Connected 6 GND-RED Ground Red signal 7 GND-GREEN Ground Green signal 8 GND-BLUE Ground Blue signal 9 N.C. Not...
  17. M

    CRT monitor pinouts

    HI FOR EXAMPLE A VGA MONITOR BY DELL HAS INDICATED IN THE SITE BELOW http://support.dell.com/support/edocs/dta/NL25/00000005.htm PLEASE TRY OUT SARMA
  18. M

    SMP power supply

    hi the circuit shold have been shown fully instead of masking valid portions-- thus it appears deliberatein the sence, it may perhaps be a question in an exam? right!! the dual caps and ajuper near the bridge provide forchange over between  two versions of incoming AC Supply -- like 110 V/60Hz...
  19. M

    Convert 6VAC to 12VDC ?

    Hi Covalier First convert the 6V AC to DC , filter it Then use a MC34063 ic with few other components in a boost mode to say 15V DC Have an additinal filter for reducing harmonics. 12DC is ready see the datasheet attached All the best sarma
  20. M

    Two 7490 to 74390

    hi do you really need to substitute-- why not, if possible original 74390 or 74ls390 if need to do. make a small adopter board with berg pins at the botom to suite t4ls390 pin ot and put 2 nos 7490 on topnear to the pins and try hard wire.. -- laborious job-- sarma
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