MT8870 DTMF Decoder Module with LCD
See received DTMF keypad tones as characters on an LCD with a compact audio-decoder module for electronics experiments.
✅ Turn a tone sequence into a visible record - The MT8870-based decoder displays supported characters from the audio input.
✅ Keep more of the sequence in view - A scrolling display arrangement handles characters beyond the visible record length.
✅ Connect an audio source directly - A 3.5 mm input and supplied cable provide the described audio path.
Compare the sound with the decoded sequence
A DTMF experiment becomes easier to follow when the received tone is shown as a character. Feed a suitable audio signal to the module and compare the sequence with the source keypad or test generator.
The CE037 is a decoder component, not a mobile phone or a complete telephone interface. Use the specified supply and audio level, and connect only to equipment intended for this low-voltage audio arrangement.
Product referenceTechnical details
- Model: CE037
- Decoder: MT8870
- Supply: 5 V DC, 5.5 × 2.1 mm power jack
- Audio input: 3.5 mm
- Characters: 0-9, #, *, A-D
- Display history: up to 32 characters with scrolling as described
- Dimensions: 80 × 36 × 24 mm
- Included: module and 50 cm audio cable
Add a visible DTMF decoding step to your electronics project.
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