![]() ![]() These encoded data can be stored and processed in a microcontroller to perform different tasks. ![]() So, knowing how are DTMF tones generated can surely be an interesting bit of info. Low and high frequencies of each button ConclusionĭTMF signals can be transmitted over the radio to switch ON or switch OFF home appliances, flashlights, motors, cameras, warning systems, irrigation systems, and so on. ![]() The frequencies generated on pressing different phone keys are shown in the Table. DTMF can also be used to call or notify another station on a selective basis. Each button lies at the intersection of the two tones. DTMF for handheld radios are tones on radios that are frequently utilized to transmit instructions via radio waves, such as repeater control, autopatch access, and IRLP access. The frequencies generated on pressing different phone keys are shown in the table FrequencyĮach row and column of the keypad corresponds to a certain tone and creates a specific frequency.
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