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Recent content by cmancuso

  1. C

    Looking for documents about phone answering machine design

    Re: Phone Answering machine Both of those links are 404 not found. Do you have current links to those sights or not?
  2. C

    Answering a Phone Automatically

    I am try to build a circuit to automatically answer a telephone line when there is an incoming call. Has anyone had any experience doing this that can offer some insight into how to answer the line and hold it in the off-hook state? What do I need to be doing in order to switch the tip and...
  3. C

    GPS NMEA 0183 sentence order

    The NMEA 0183 messages are standard. GPS manufacturers which adhere to the standard all have the same sentence structure and order. Some manufacturers however will have a proprietary string format, which may or may not be different than NMEA 0183. If the sentence is a GGA or GPL or one of the...
  4. C

    Reducing the Size of a Multiple Transistor Design?

    Have you tried using surface mount technology instead of through hole technology?
  5. C

    Transistor as a switch

    Basically Vcc charges the crystal which begins to oscillate. R2, C1, and C3 keep the oscillation of the crystal oscillations going. R2 and R1 act as a bias for the base of the transistor which is oscillating, and the transistor is being turned on and off at the frequency of the crystal. The...
  6. C

    LDO transient response

    Can you post a schematic or circuit diagram please?
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