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  1. dorke

    Chip`s plastic protection removing ?

    Why do you need to remove it? Is it for getting a contact with the IC's pins? If so you can gently scrap it with a scalpel on pins you are after.
  2. dorke

    Killing SSR (relays) - Need to understand

    One problem I can clearly see is the SSR gets too hot. 80 degrees Celsius is just at the top recommended working temp. range. Fotek SSR-40DA datasheet That is not good! Are you using thermal grease? Are the screws tight enough? Is the fan working at all times (including turning off the SSR)...
  3. dorke

    Multiples Fans - cooling system for Laptop

    For 12V fans you should use 12V P.S. USB is only 5V. You have 2 possibility : 1. Use an AC line Adaptor to 12V (current should be higher than the sum of all currents of the fans you connect). 2. Use a DC to DC converter 5V to 12V In both cases you don't need any resistors.
  4. dorke

    Can you please help me with my project?!?!

    Welcome to EP. Simple
  5. dorke

    multi meter dt9205a ce

    Welcome to EP. The DT9205 is a cheap low quality Chinese DMM. Anything can happen with it ,most of all bad contacts in the rotary function selector are a given...:(
  6. dorke

    3 wires circuit

    Welcome to EP Which of the circuits are you referring to 3.41 or 3.42 ?
  7. dorke

    Oscillator or Not?

    Well, You haven't answered any of my questions. Did you even understand them? In short this so called "scientific experiment" conclusion can be at best: The effects of an EM field at the specific frequency of 60HZ and at the specific level of 0.15 - 0.20 µTesla are : ...yyyyy and don't forget...
  8. dorke

    I am to design a switched mode psu without IC components.Help please

    What about zener- diodes ?
  9. dorke

    I am to design a switched mode psu without IC components.Help please

    Did the course cover BJTs and MosFETs as switches? Have you covered Schottkey diodes? What about about op. Amps? Edit: What about differential Amplifiers ?
  10. dorke

    DVB to WiFi

    Why do you think It isn't done? A wifi video streamer does it,like the Slingbox M1. I think it may be too complicated as a school project.
  11. dorke

    Oscillator or Not?

    Hold your horses(or what ever you are riding on in Canada).;) I find this so called "experiment" not very "informative". 1. We all know that EM waves(as in light waves) have immense effect on seeds-no need to test that,don't you think? 2. You haven't defined the strength of the EM field you...
  12. dorke

    I am to design a switched mode psu without IC components.Help please

    That specific name doesn't mean much. Could you post the syllabus of the course .
  13. dorke

    I am to design a switched mode psu without IC components.Help please

    Well, We can help you with that design. But, you should do most work yourself(so that you will learn). Start and show what you have come-up with and get feedback. Ask questions freely. The issue of SMPS design isn't very simple it has a lot of issues involved with it. I would design a...
  14. dorke

    Explanation of different current/voltage types: RMS, Peak, Mean, DC, AC

    Welcome to EP. Please explain what is RMN? Where have you seen that?
  15. dorke

    power supply

    Another issue with your circuit. Not quite,;) What you will have is a blown zener-diode Here is the fix for that:
  16. dorke

    I am to design a switched mode psu without IC components.Help please

    Did they teach you anything about Switch Mode Power Supply? What "Innovation" are they talking about?:( Sorry to say this , but this sounds like a pompous teacher/school ,full of B.S
  17. dorke

    Project help

    What have you learned and do know so far about analog computing? A hint to your project: integration.
  18. dorke

    Heliporto with TI-1795

    Z80? Noway! What does a calculator needs a uP for? It has a dedicate calculator chip like this one.
  19. dorke

    Capacitor Value

    Welcome to EP. First thing take a sit,you are in for a supersize. Well this is actually not a capacitor.o_O It is a fuse, a reset-able poly-fuse a 0.4A/72V one.
  20. dorke

    Oscilloscopes

    First thing you need to let us know is what are your going to measure with the scope ,what are the needs and requirements. Can you define the above?
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