This compact and highly readable DTMF(Dual Tone Multi Frequency) Decoder Module stands out in the league of similar modules available in the electronics markets provide operates 5 to 9 V DC. Every single data bit is provided with an on this board led indicator for quick visual confirmation. The momentary output LED bit is also provided with a bright white flash LED.
When a valid DTMF tone is received as input the status led flashes and the corresponding 4 bit binary value is latched to the output pins D0, D1, D2 & D3 and then a status led blink. The module is capable of providing 16 different outputs if the tones are fade thru a tone generation circuit or through PC based software ( the inputs being from 0-9 * # and A B C D ).However when operated through cellular phone device it can provide only 12 diff outputs because of 0-9 keyboard along with *
Decodes DTMF as 4 bit binary
TTL level output for direct connection to microcontrollers
Low power 5V DC operation & Operating Current 100 mA
LED indication of outputs
Simple to use
Based on excellent HT92B70 IC