Frequency Modulations
| Circuit / Schematic diagram of | Description |
| Oscillator / Transmitter | |
|
FM Optical Transmitter (Circuit on demand) |
Transmitter with center frequency 50Hz. Can be used for data transmission application. |
| 500Mw FM Transmitter | 4 transistor based FM transmitter useful for long range transmission |
| 400m FM Transmitter | 2N3904 Based Transmitter having range of 400m or more |
| FM Stereo Modulator | |
| FM based wireless MIC | Transmit voice signals to any FM Radio 100 meters away. |
| FM Transmitter | FM transmitter with microphone and based on transistor. |
| FM Transmitter 2 | Three transistor based powerful fm transmitter. |
| FM Transmitter 3 | The range of transmitter is around 500m. |
| FM Transmitter 4 | |
| Low Range FM Transmitter | The range of the transmitter is around 300m. |
| Low Range FM Transmitter 2 | The range of the transmitter is around 100m. |
| Low Range FM Transmitter 3 | |
| Low Range FM Transmitter 4 | Very small transmitter can be used as a spy. |
| High power linear FM Transmitter | 30 Watt FM transmitter. |
| High Power FM Transmitter | 5 Watt FM Transmitter. |
| High power FM Transmitter | 4 Watt FM transmitter. |
| Long Range FM Transmitter | The circuit provides the range of 1Km. |
| Long Range FM Transmitter 1 | The circuit provides the range of 2KM. |
| Long Range Fm transmitter 2 | Transmitter with 0.4 watts of power and wide band modulation |
| NOT gate based FM Transmitter | NOT gate are placed in parallel so as to make output impedance low. |
| FET Based FM Transmitter | Based on high frequency field effect transistor. |
| FM Spy | Small transmitter operates on 1.5V battery. |
| FM Spy 2 | Has range of 10-20m and operates on 1.5V battery. |
| Sensitive FM Transmitter | |
| Tiny Fm transmitter | Small transmitter with one transistor and operates on 3V supply |
| FM Beacon Broadcaster | |
| FM Broadcaster | Audio signal can be directly fed to the transmitter. |
| VHF FM Transmitter | |
| Easy FM Transmitter | Transistor based 0.4 Watt FM Transmitter. Frequency 87,5-108 MHz |
| Portable FM Transmitter | Uses PLL digital tuning and has variable power (0.4 or 1Watt) |
| Antennas | |
| FM Booster | Boosts the reception if place between receiver and antenna. |
| FM Radio Antenna Amplifier | This amplifier will pull in all distant FM stations clearly. |
| Active Antenna for AM/FM/SW | This simple little circuit can be used for AM, FM, and Shortwave (SW). |
| Active Antenna for HF-VHF-UHF | Antenna designed to amplify signals from 3 to 3000 MegaHertz |
| Receiver | |
| FM Radio | TDA7000 based FM receiver and can be connected to PC |
| FM Radio 2 | TDA7088 based FM Receiver. |
| High Performance FM Receiver | |
| FM Receiver | An FM regenerative receiver using a single FET and one audio amplifier IC. |