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Atmega32 based telephony platform

If you have a land-line telephone at home probably it already has lots of features like answering machine, phone number identification, recorder. I bet it can’t do that much as this DIY device does. This telephony platform has lots of features including:

• Works both as a standalone device or in conjunction with a PC

• Records up to 230 calls or 17 hours of audio with a 512MB MMC/SD card

• DTMF detection for European-style incoming caller ID and outgoing number detection

• Allows listening to calls in real time or replaying them later

• Allows simultaneous record and playback

• Transmits audio over the serial port either in real time or replaying from the memory ca

• LCD for call progress monitoring and timing

• Optional “mini-UPS” battery backup allows operation even in case of power failures

telephony-platform

Device is built around Atmega32 microcontroller and smaller ATTiny45 which is responsible for battery voltage and AAA NiMH charging. Device is controlled by 5 push buttons while viewing actions in simple 2×16 LCD. Great project to make your home more hacked. Full project can be found here.

[..Source link..]

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5 Comments

  1. How about some more info about this project? Who, what, where, etc.

  2. Seems like that is a paying Circuit Cellar subscribers only link.

  3. Follow [read] link for full project info.

  4. Thanks. I missed that little word, as it is on the same line as the Google ads!

  5. hi i am doing mini ups system project can u help me .can mail the photos of circuit and costing and datasheet.equpiments cost thank you help me pls

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