๐ ๏ธ MAKER GUIDEMay 22, 2026โขโฑ๏ธ 1 min readโข๐ณ๐ต Tested in Nepal
Interactive Audio Box with ISD1820 Voice Recorder & Push Buttons
Build an interactive multi-language voice playback station for school science exhibits, museum models, and talking signs with the ISD1820 module.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (5/5 items):
NPRย 1,590
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Interactive Audio Box with ISD1820 Voice Recorder & Push Buttons
The ISD1820 Voice Recording & Playback Module with On-Board Mic & Speaker records up to 10 seconds of clear audio with touch playback triggered by TTP223 Capacitive Touch Sensors and an Arduino Nano.
Hardware Bill of Materials:
- Voice Recorder: ISD1820 Voice Recording & Playback Module with On-Board Mic & 0.5W Speaker
- Microcontroller: Arduino Nano V3.0 Solderless
- Touch Inputs: 2x TTP223 Touch Key Switch Module Touch Button
- Power: Type C TP4056 Lithium Charger + 18650 3.7V 3000mAh Battery
Circuit Pinout & Wiring Connections:
| Component / Module Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| ISD1820 VCC / GND | 5V / GND | Audio Playback Circuit Power |
| ISD1820 PLAYE (Edge Trigger) | Pin D3 | Triggers Full Message Audio Playback |
| ISD1820 REC (Record) | Pin D4 | High Active Live Microphone Recording |
| TTP223 Touch 1 OUT | Pin D6 | Touch Trigger for Exhibit Narration |
| TTP223 Touch 2 OUT | Pin D7 | Touch Trigger for Secondary Audio Track |
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