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  1. eeJason

    Liquid Level Sensor

    I've seen this done quick and dirty using a "home-made capacitance probe". It'll work as long as your liquid isn't a perfect insulator (which it probably isn't): Dangle two wires into the liquid, and use them for the capacitor, or as part of the capacitor on a 555 timer. Route the output to a...
  2. eeJason

    vb.net to micrologix plc

    The web server in the MicroLogix is not user-configurable. That is, it's not the "standard" web server that Rich is referring to. AB does make web server modules for the CompactLogix and ControlLogix platforms that enable you to do exactly what you're describing, however. Check out the...
  3. eeJason

    Looking for Slack Rope Switch for Hoist

    I'm working on a project that employs a monorail hoist for lifting and positioning 55 gal drums. One of the requirements for the hoist is that it include a "slack rope detection system." The hoist manufacturer that I'm working with isn't familiar with such a device, and several hours of...
  4. eeJason

    Combining AC / DC signals in single conduit.

    That'll be determined largely by the mechanics of the hardware. I can't really give you a hard and fast answer, since the thing hasn't been built yet. I suppose I might be able to tolerate up to 100ms delay or so, though I'd prefer something closer to 10. If you're driving at the filtering...
  5. eeJason

    Combining AC / DC signals in single conduit.

    The signal from the switch is dropped across a pulldown resistor. The input impedance is about 5kOhm. The switching threshold is 10V, and the datasheet gives no mention of hysteresis, though it does have a programmable delay that can be used for filtering out noise.
  6. eeJason

    Combining AC / DC signals in single conduit.

    Unfortunately I don't have the latitude to change the design at this point in any manner other than to adjust conduit runs & conductor/cable types. My question is really whether it would be a dumb idea on my part to argue for combining the circuits in the same conduit to save a run. JLSeagull...
  7. eeJason

    Combining AC / DC signals in single conduit.

    Thanks for the reply. The coil on the solenoid is on the order of 20W. I wouldn't think this would be considered large. I looked around, but wasn't able to find any such discussion. If you could refer me to the thread you have in mind it would be much appreciated.
  8. eeJason

    Combining AC / DC signals in single conduit.

    Hello, I would like to combine a circuit driving a solenoid valve at 120VAC in the same conduit with a limit switch signal operating at 24VDC. All the wires are 300V rated. The customer is concerned that the wires for the AC solenoid valve will induce a voltage in the limit switch wires...

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