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  • Users: palindrome
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  1. palindrome

    NTE1942 Variable voltage and current, 5 pin TO220

    Hello - I'm trying to cross reference back an NTE1942 linear voltage regulator. I called NTE and they can't uncross a device. Does this device look familiar to anyone that might know the original device? I've looked at most every Semiconductor Manufacturers linear regulators product line...
  2. palindrome

    Motion Sensor Theory of Operation, Remote Activation

    I did a quick search on 'motion sensors' looking for information on what their principal method of operation is. I didn't get any hits so I ask: I believe they use infrared sensors, not sure what else is available - cheaply and accurately. My question is what wavelength do the IR sensors...
  3. palindrome

    Motor Control in Cordless Drill. How is it done?

    How is the speed control handled in cordless drills? Is it more than just a variable resistor - active circuit, or not? TIA
  4. palindrome

    Relay controlling Relay, Won't dropout

    Hello, My question deals with a GE wireless Outdoor Motion-Sensor Light Adapter. The part number is PIR612A. Now as all good engineers, I using this product differently than its intended design. Instead of using it to sense motion and turn on a 120 VAC light I would like to use it to sense...

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