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Recent content by chemelec

  1. chemelec

    Corrosion issues in stud mounted parts

    Yes, No Nut Required.
  2. chemelec

    Corrosion issues in stud mounted parts

    If you have the Correct Tap for the Threads, It should work Perfectly OK.
  3. chemelec

    Corrosion issues in stud mounted parts

    almost always Aluminum. And Silicone Grease is Recommended by Manufactures of these type of parts. It Increases Heat Transfer from the part to the Heat Sink.
  4. chemelec

    Corrosion issues in stud mounted parts

    I have used up to 40 Amps. But I Do use "SILICONE BASED HEAT SINK GREASE". - - - Updated - - -
  5. chemelec

    Corrosion issues in stud mounted parts

    I Never had any Problems
  6. chemelec

    Contact less water level sensors

    DC Causes Electrolysis between the Probes. AC Might be Better, especially if a low current. Besides that, there are Many Grades of Stainless steel. Many of which or Very Poor Quality.
  7. chemelec

    Output of Variable gain amplifier?

    Could be correct as it partly Depends on the +/- Tolerances of your Resistors.
  8. chemelec

    Long OFF_time timer by 555

    A CD4541 will provide LONG Time Delays
  9. chemelec

    Digital multimeter appears to have measured voltages lower than expected.

    If it has an Amplifier in it, It will also have a Battery.
  10. chemelec

    [SOLVED] LM3914 - What might "dot/bar logic" be?

    I kept All the Old data Books, starting from about 1970. TI, National, Motorola, On Semi, Harris, RCA, Unitrode, Exar, Raytheon, Linear, and some others.
  11. chemelec

    [SOLVED] LM3914 - What might "dot/bar logic" be?

    You would need to find the Circuit Equivalent, than trace out Pin 9 On it. I equivalent circuits for many IC's but Not for the LM3914, 3915 or 3916 series. And Google didn't show it either.
  12. chemelec

    [SOLVED] LM3914 - What might "dot/bar logic" be?

    When Pin 9 is connected to the V+ Supply Voltage, you will get a Bar Display.
  13. chemelec

    32.76 kHz Colpitts oscillator circuit

    I Know, But I wasn't considering the Topic of a Colpitts as being important. - - - Updated - - - You could add a Small Inductor and Capacitor on the output to get a Sine wave.
  14. chemelec

    32.76 kHz Colpitts oscillator circuit

    This Circuit works with some of these Crystals.
  15. chemelec

    High Impedance, High Voltage measuring circuit

    Why not just build a High Impedance Voltage divider to go directly into your Multi-Meter? Where is Southside? I have lots of 500 Meg and 2 Gig, HV resistors. Connected in Series with a Pot, you can calibrate them to read accurately on your meter.

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