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  1. MP1

    satellite speaker problem

    Yeah, but sony has filtering inside the speakers. John might not even have a problem.  Without specifications, it is a coin toss. MP
  2. MP1

    Brewing heater interface

    Hi Greg, First, you would use any temperature sensor that you desire, put it in a sealed container that will allow temperature transfer, and convert this reading to a 0-5 volt reading for the range of the sensor. A micro with on-board Analog to Digital converter will convert your voltage into a...
  3. MP1

    Potentiometer link to linear actuator (update)

    dermotcaf, What are you trying to accomplish with this design? How much resolution do you need? Sometimes things are possible but not the best way to go about it. Why not describe your project and let several members of this forum kick out their ideas. MP
  4. MP1

    Choosing Loud Speaker

    Shahriar, The specifications of the speaker are part of it. However, the design of the box is also very important. Also, it must work well with the signal you are putting into it. All of this is calculated into the design by the system professional. You might want to start from a kit as Sasi has...
  5. MP1

    satellite speaker problem

    I didn't see the original conversation, but don't all of the SONY Satellite speakers already have frequency compensation and crossover networks built into them? Why would additional filtering be needed? MP
  6. MP1

    IC 555 instead of IC 50240

    RF, I don't think you can print out your finished board with ExpressPCB. The manufacturer gives it away so that you will send them the file and pay them for boards. No one else can read their files. You can get a free copy of Eagle on the links section of this site. It will work much better for...
  7. MP1

    IC 555 instead of IC 50240

    FYI: PLL will not give you a sine wave. A VCO with AR generator and filters will allow you to duplicate many different instrument sounds. MP
  8. MP1

    IC 555 instead of IC 50240

    Yes, fatman would give you some flexibility. Also, you mentioned programming. I was wondering if you knew that microcontrollers can be programmed with basic. The PIC can use PicBasic and AVR microcontrollers have Bascom AVR. Even if you do not use it for the heart of your project, it makes for a...
  9. MP1

    MOVED: cell phone jammer

    This topic has been moved to Circuit/General Requests. This topic was removed from the Projects Q/A forum. The Projects Q/A forum is reserved for discussion regarding projects in our Projects section. To see these projects, click on the blue button near the top of the page titled "Projects". To...
  10. MP1

    IC 555 instead of IC 50240

    Hi Rf, These are exactly what I meant. You will need a VCO for each note of the chord that will be played at once. a low pass filter, high pass, and band pass will be very helpful for fine tuning the instrument that you want to simulate. Then you will run the filtered VCO(s) through the envelope...
  11. MP1

    digital stetoscope 2!

    Post a schematic of what you have put together. Otherwise all posts will be theories and guesses at best. MP
  12. MP1

    Automatic Light System

  13. MP1

    high speed bit streams

    Pic needs 4 clock cycles per instruction. AVR completes one instruction per clock cycle. I have no idea what you are talking about with bitwise chips, comparisons, and having problems extracting a bit at a time with a micro. Never had such problems with a micro. Are you refering to CRC error...
  14. MP1

    IC 555 instead of IC 50240

    sounds like you are trying to re-invent basic vcos and voltage controls, but going in the wrong direction. Reptilian: Just look up PAIA electronics and look for schematics for their old synthesizer modules. They used very few parts and had much more capability than what you can get out of a...
  15. MP1

    DS1621 pc thermometer

    Siddharth, If you could explain why your project did not work and what you found to cure the problem, it might help someone else if they run into a similar block. MP
  16. MP1

    MOVED: SMT/SMD

    This topic has been moved to Electronics chit chat. The Projects Q/A forum is only for discussion of the projects on this site. http://www.electronics-lab.com/forum/index.php?topic=9960.0
  17. MP1

    Variable Power Supply

    Advantages are less heat dissipation and the amount of current required. MP
  18. MP1

    Auto dimming problem

    Handcannon, Here is what I meant with the diode. The pots are for the proper adjustment of the circuit. You should start with them in the center position. Usually, the designer will add a fixed resistor in series so that full adjustment will not allow a direct short. You can calculate how much...
  19. MP1

    electronic stesthoscope

    I doubt this graduating student is having a problem building the simple amplifier circuit for the stethoscope. As AN920 has mentioned, the tasks needed can easily be performed by a micro. Bynes needs to decide which one and which language, for further assistance. MP
  20. MP1

    Auto dimming problem

    As I said, I recommend the use of a regulator, ante. I am sure the author never expected anyone to put a pot in the zero ohm positon, which of course, is a direct short. Aaron Cake admits that he is not an engineer. It is just a circuit that worked for him. I do not know what he used for pots...
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