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  1. Hero999

    Laser Based Speed Sesor Circuit...HELP!

    You've been asked questions because you haven't provided enough information. No one will be able to do what you want regardless of how much money you pay them, unless you provide them with a detailed specification of what you want and are able to answer the appropriate questions.
  2. Hero999

    Laser Based Speed Sesor Circuit...HELP!

    Why not? Have you tested it? What is it you want to measure the speed of?
  3. Hero999

    Laser Based Speed Sesor Circuit...HELP!

    Why not use radar? http://www.ebay.com/itm/Bushnell-Velocity-Speed-Gun-Sports-Radar-Gun-101911-/390773879599?pt=LH_DefaultDomain_0&hash=item5afbf0332f
  4. Hero999

    [HELP]Logic Gates Application

    You're being a bit vague. There are other ways to implement a monostable than a 555 timer such as a couple of logic gates, transistors, a comparator or a flip-flop.
  5. Hero999

    Whats that background circuit ?

    An old topic but I was curious myself so I thought I'd find out. That works but the circuit is very difficult to read. Fortunately it's easy to increase the contrast to make it readable.
  6. Hero999

    electromechanical circuits

    What's the point of this thread? I was tempted to delete it.
  7. Hero999

    need help in connecting a 4 wire RTD in a WheatStone Bridge

    http://en.wikipedia.org/wiki/Resistance_thermometer#Four-wire_configuration
  8. Hero999

    Need to uncomplicate a circuit, Glow plug timer

    A 555 timer is the simplist wat to do this.
  9. Hero999

    circuit diagram needed.

    http://www.mini-box.com/M4-ATX?sc=8&category=981 http://www.powerstream.com/DC-PC-12V.htm
  10. Hero999

    Techniques for ensuring output/input impedances are compatible

    You're right. It has a built-in input and output buffer. If you design the circuit in accordance with the datasheet, you won't have any problems. What are you doing with the data once it's been sampled by the ADC? Why not bais the ADC input at half the supply voltage or use a precision full...
  11. Hero999

    grounding

    1) If the mains neutral wasn't connected to earth, it could float at any voltage. Suppose someone connected a 10kV autrotransformer to the mains and the seondary became shorted to earth? The mains would then float at 10kV above earth, causing fire as the insulation isn't rated to that voltage...
  12. Hero999

    CPLD , FPGA , PAL OR GAL working with 12 volts I/O voltage...

    I don't know much about programmable logic. All I know is PLDs tend to operate from a lower voltage than 12V so you need a regulator such as the LM78L05 for the logic. You'll also need level shifting and buffering on the output to boost the logic levels to 12V. The logic inputs can be connected...
  13. Hero999

    1 bit shift register

    http://www.ee.ucr.edu/~stan/courses/eecs168/eecs168_12wint/lab6/lab6.html
  14. Hero999

    Hard wire media device into car?

    Is that with the engine running? That's quite low and would indicate a flat battery. Try it, a lower voltage shouldn't do any harm. It might just become unreliable.
  15. Hero999

    Hard wire media device into car?

    It should be possible to wire the DVD player directly to the car without and other circuitry.
  16. Hero999

    Help Me Decide

    I don't know. All I can say, is if you want Rigol, don't bother with the DS1102, get the DS1052E  and hack it to 100MHz.
  17. Hero999

    Multiturn loop antenna design

    24Hz? Are you sure you don't mean 24kHz? 24Hz is far too lower frequency to be of any use. You'd need an enormous antenna. The wavelength is 12491km which is the approximate diameter of the earth.
  18. Hero999

    mpu6050 dmp

    Sorry, I've no idea so can't help you.
  19. Hero999

    mpu6050 dmp

    What do you mean by dmp? Have you searched for the datasheet using a search engine? http://www.cdiweb.com/datasheets/invensense/PS-MPU-6000A.pdf
  20. Hero999

    High Power invertor circuits

    Read the papers linked below: http://www.wpi.edu/Pubs/E-project/Available/E-project-042507-092653/unrestricted/MQP_D_1_2.pdf http://www.ti.com/lit/an/slaa602/slaa602.pdf http://www.wpi.edu/Pubs/E-project/Available/E-project-042711-190851/unrestricted/PWM_Techniques_final.pdf
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