PIN Details of IC 7130
Funtions : Audio amplifier
| Pin No. | Function | Voltage |
| 1. | Audio ampliefier output | 5.4 |
| 2. | Ground (-Ve supply voltage) | 0 |
| 3. | Decoupling capacitor | 0.2 |
| 4. | Bias Capacitor | 5.3 |
| 5. | Audio amplifier input | 5.3 |
| 6. | Not connected | NC |
| 7. | Bias Capacitor | 9.9 |
| 8. | Decoupling capacitor | 9.8 |
| 9. | Positive (+Ve supply voltage) | 10.7 |