Recent content by GPG1

  1. GPG1

    Stupid op-amp question

    ~43.5mV, 23 gain Reference please Reference please Capable of doing so down to 5
  2. GPG1

    Stupid op-amp question

    Previous post Gain of 23 The sensor is easily able to drive a 10K load. The amp is probably stuffed through shorting the outputs.
  3. GPG1

    Stupid op-amp question

    In his original circuit, the output will be 6.6V It only goes to 7.6 volts in your modified design. There is nothing wrong with the original design that requires modification, and it provides much better common mde rejection since the gain from both inputs is equal.
  4. GPG1

    Designing a computer based voltmeter

    . http://www.dutchforce.com/~eforum/index.php?showtopic=1556
  5. GPG1

    Mysterious Resistor?

    The NE5532 is damaged. Replace it.
  6. GPG1

    Stupid op-amp question

    Correct
  7. GPG1

    Designing a computer based voltmeter

    Bits of resolution for voltage measurement
  8. GPG1

    atx power supply for robot

    http://www.uco.es/dptos/electro/electronica/documentos/ele2N3055-D.pdf If forced beta = 10 you have a good margin.
  9. GPG1

    KVM switch circuit / Multi-pole double throw switch

    Look at http://www.ee.washington.edu/stores/DataSheets/cd4000/74c244.pdf
  10. GPG1

    KVM switch circuit / Multi-pole double throw switch

    The 4053 is an analog bidirectional switch. Looking at the pinning of the 157 it is easy to make the assumption that it is too. The OP saying that he was trying to switch between 2 leds lead me to the possibility that he had made the same.
  11. GPG1

    Temperature sensitive fan speed controller

    http://www.micrel.com/product-info/products/mic502.shtml
  12. GPG1

    DTMF

    http://www.electronicsforu.com/EFYLinux/circuit/jun2003/CI-2-DTMF.pdf http://assets.zarlink.com/AN/msan_108.pdf
  13. GPG1

    Designing a computer based voltmeter

    What resolution do you need?
  14. GPG1

    temp sensor cooling system

    Presuming you are monitoring the cylinder head temp, you will need a thermocouple or RTD for these temperatures. Sparkplug mtg one here http://www.performancetrends.com/DatamiteTemperaturePictures.htm
  15. GPG1

    KVM switch circuit / Multi-pole double throw switch

    The 157 is not a bidirectional switch
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