Cost of developing a fairly simple alarm/timer circuit

Discussion in 'The Projects Forum' started by summersab, Feb 28, 2016.

  1. summersab

    Thread Starter Active Member

    Apr 8, 2010
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    I have a product that I'd like to develop, but my circuitry skills are pretty limited. I wonder how much it would cost to have a circuit designed and built and how I would go about doing so. My need is fairly simple:
    1. Real-time clock
    2. Simple alarm feature
    3. Buttons for setting the time and the alarm
    4. Display
    5. Able to be powered by two or three lithium-ion cells (or a single cell with a boost circuit)
    6. One output for a speaker (alarm will sound for one minute)
    7. Second output for 9-12V power/direct feed from battery source (activates 10 minutes after the alarm and stays active indefinitely
    8. If possible, it would be great for the circuit to be flexible, but not necessarily a requirement
    That's basically it. If such a thing already exists, I've been unable to find it online - I'd certainly be interested in using something that already exists.

    Thanks for your help!
     
    Last edited: Feb 28, 2016
  2. Papabravo

    Expert

    Feb 24, 2006
    10,148
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    The minimum development cost to design and manufacture a prototype run of say 50 pieces should be in the range of about $12,000.00, if you are really good at defining your requirements. If not you can add about $3000.00 for specification development. How does $15,000.00 grab you?
     
  3. summersab

    Thread Starter Active Member

    Apr 8, 2010
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    Honestly, a tad more than I expected, but not unreasonable. Where would I go to get something like this built? Are there companies that do this sort of thing? Of course, the alternative is continuing to search to find something that already exists. I'm now on friggin Alibaba looking at time delay relays, but most are just countdown timers - ugh!
     
  4. Papabravo

    Expert

    Feb 24, 2006
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    Where are you located? I'm familiar with companies located in the American midwest.
     
  5. summersab

    Thread Starter Active Member

    Apr 8, 2010
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    Tulsa, Oklahoma.
     
  6. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Too bad you didn't ask for this in 1978. National semiconductor was still making modules and had this for sale - everything you asked for.


    image.jpg image.jpg image.jpg
     
  7. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    1 through 5 are covered by a simple travel alarm clock from RS or Wal-Mart. 6 would require a modification. 7 is the problem. Can you share more details about it?

    ak
     
  8. summersab

    Thread Starter Active Member

    Apr 8, 2010
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    Travel alarm clocks don't sound indefinitely. The only one that does is called the Screaming Meanie (found at truck stops - I've owned several). I'm thinking I'm going to go a slightly different route for the moment and gather some off the shelf things like a delay timer relay module just to get moving. It's not an RTC, but it will work for a prototype.

    All that aside, who would I approach to build a custom circuit once I get to that point? I have no idea...
     
  9. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    On this site you have fora for Electronics Resources, Embedded Systems, and Marketplace. Plus, there are other sites such as Electronics Point and Electro-Tech Online.

    Once you have a few buttons and a display, the project screams for a microcontroller. My hardware skills are MIL-grade, but I'm a heavy amateur or lite professional at firmware.

    ak
     
  10. summersab

    Thread Starter Active Member

    Apr 8, 2010
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    0
  11. Papabravo

    Expert

    Feb 24, 2006
    10,148
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    If you do decide to tackle this design on your own you can count on help when you need it here.
     
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