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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by Dr.Mandrake

  1. Dr.Mandrake

    Electronic Thermometer

    Hi Eric, yes but my initial thought was to start from a room temperature meter so that later I could modify it according to my needs but at the same time keeping the resolution at .1C. Later I like to to widen the range below 0C. I haven't done much projects in electronics. Cryogenics is my...
  2. Dr.Mandrake

    Electronic Thermometer

    Thanks for everybody's attention. It's just for my study purpose. I'll be creating different temperature conditions in a closed container. I want a seven segment one because I've to use it in the dark. .1C or resolution is better because it'll always give an accuracy of .5C at least. 1C...
  3. Dr.Mandrake

    Electronic Thermometer

    Wow thanks very much for your inputs! jbeng, thanks for the information regarding ICL7107. Brevor, why you told that the calibration and finetuning is difficult for ICL7107. I couldn't much understand the circuit posted by jbeng, but I think that it uses thermistors as sensors and you are...
  4. Dr.Mandrake

    Electronic Thermometer

    I am going to work on an electronic thermometer which detects ambient temperature and output to a seven segment display. Range is 0C-99C and it should be able to display upto one decimal point accuracy. eg. 12.5. I searched through net and found temperature sensor ic's readily available such as...
  5. Dr.Mandrake

    T.sonic 610 portable MP3 play memory upgrade

    If your have no problem then go for it! Transcend doesn't have a authorized service center in India. You won't get a replacement after 1 year eventhough the warranty period is 2 years. Some new pieces even may be faulty. But I do agree that 610,630,650 models are very good music performers. 90%...
  6. Dr.Mandrake

    T.sonic 610 portable MP3 play memory upgrade

    I wondered that you opened your transcend device. All Transcend music models are suffering from initialization/battery problems if not handled extreme carefully. 3 years of faultless working is amazing. So it would be better not to touch the device in anyway otherwise the micro device will...
  7. Dr.Mandrake

    Popup window for new users/posters

    Just a suggestion which I have seen during my experience on other forums. Important forum announcements will be displayed first even for a regular member while login. IMO that can significantly affect on the users. A few of them are misusing it for advertising purposes even. These forums are...
  8. Dr.Mandrake

    Popup window for new users/posters

    It is possible to force up on a newly joined member to read the forum rules and guidelines before starting any activities. Selected number of sticky threads can be displayed or can be diverted to an open thread displaying "Request for student projects is prohibited" or whatever need to be there...
  9. Dr.Mandrake

    Designing circuit/please i need ahlep

    This is very confusing. You are an engineering student. Don't your university teach you English or lecture classes all in Arabic?
  10. Dr.Mandrake

    I need Some help

    Hi Swetha, you may post your code here itself with in "code" tags. Somebody will help you out.
  11. Dr.Mandrake

    UHF VHF Field strength meter

    The topic is very old one. It was posted on 2006. Feel like talking to ghosts.
  12. Dr.Mandrake

    Dish Tv, Tata Sky Signal Jammer

    Now the days of dth services more are coming you can expect a dish put on your head soon. shoot'em up(dishes). or try the dishes as your toilets, precautions taken for exposure to uhf rays.
  13. Dr.Mandrake

    diodes

    what is a half wave bridge rectifier.
  14. Dr.Mandrake

    Problem with noisy fan

    some reasons: 1.fan motor gets electrical noise and works as a speaker. 2.incompatible fan produce noise and heard in the smal cpu speaker.
  15. Dr.Mandrake

    help me plz

    A Joule Thief torch. Simple.

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