The circuit referenced here is a bird microphone transmitter that will assist you with listening to the bird songs. Set this device outdoor and hear the lovely voices of birds effectively by sitting at home with no wire connections.
The circuit is essentially an FM transmitter circuit that will play the bird voices on your FM. You can likewise copy these birds’ voices in your memory after getting it on your FM radio. One incredible feature of this RF circuit is that you don’t need to change the battery once you place it outside anywhere for listening to the bird’s sound.
Hardware Component
The following components are required to make Bird Microphone Transmitter Circuit
| S.No | Component | Value | Qty |
|---|---|---|---|
| 1 | Diode | 1N5817 | 1 |
| 2 | Solar Cell | 3V | 1 |
| 3 | Battery | 1.2V | 1 |
| 4 | Mic | – | 1 |
| 5 | Resistor | 5.2K, 39K, 100Ω | 1, 1, 1 |
| 6 | Ceramic Capacitor | 0.47µF, 1nF, 28pF, 2pF, 5pF, 10n, 62pF | 1, 1, 1, 1, 1, 1, 1 |
| 7 | Antenna | 12 inch | 1 |
| 8 | Trimmer Capacitor | 1-30pF | 1 |
| 9 | Coil | 2 turns of #24 wire on 5 mm | 1 |
| 10 | Transistor | 2N2222 | 1 |
2N2222 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N2222
Bird Microphone Transmitter Circuit
Working Explanation
The circuit is utilizing a 1.2 V rechargeable battery and a 3 V solar cell which will function as a battery charger during day time. The circuit will work for a long time or years ceaselessly until the rechargeable battery becomes failed. Make the circuit on a decent quality PCB and attempt to keep all segments as close as could reasonably be expected and fit the circuit in a box to make it weatherproof. After finishing the circuit tune your FM radio on a clear spot between 100 to 108 MHz and somewhat turn the capacitor of the transmitter with a non-conductive device to tune the transmitter to your required frequency. Fix the circuit where it will get sunlight for charging the 1.2 V battery. Utilize an antenna of 12 inches.
Applications and Uses
The circuit is used when you want to hear the lovely voices of birds by sitting at home without any wire connections.
