Difference between revisions of "DTMF Decoder"
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'''DTMF Decoder Breakout''' | '''DTMF Decoder Breakout''' | ||
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| + | The DTMF (Dual Tone Multiple Frequency) breakout boards decodes the key press from mobile phone to 4 digit binary code. If you've wondered how an IVR works when you call customer support, it uses an DTMF decoder. So whenever you press a key on your phone, it is decoded and it plays the pre-recorded messages. It can be used to control devices, move robots from a distance. | ||
| + | ===Features=== | ||
| + | *Based on MT8870 or compatible decoder. | ||
| + | *Works in differential mode | ||
| + | *Indication LEDs for the binary output | ||
| + | *Output pins taken out. | ||
| + | ===How to connect?=== | ||
| + | The board has a standard '''3.5mm''' audio jack with which you can connect to phone. You may buy [http://exploreembedded.com/product/Male%20to%20Male%203.5mm%20Cable the standard 3.5mm audio cable.] . | ||
| + | |||
| + | ==='''Downloads'''=== | ||
| + | *[http://exploreembedded.com/wiki/images/e/e6/DTMF.pdf '''Schematic'''] | ||
| − | + | {{DISQUS}} | |
Latest revision as of 17:09, 4 April 2015
DTMF Decoder Breakout
The DTMF (Dual Tone Multiple Frequency) breakout boards decodes the key press from mobile phone to 4 digit binary code. If you've wondered how an IVR works when you call customer support, it uses an DTMF decoder. So whenever you press a key on your phone, it is decoded and it plays the pre-recorded messages. It can be used to control devices, move robots from a distance.
Features
- Based on MT8870 or compatible decoder.
- Works in differential mode
- Indication LEDs for the binary output
- Output pins taken out.
How to connect?
The board has a standard 3.5mm audio jack with which you can connect to phone. You may buy the standard 3.5mm audio cable. .
Downloads