TREE

This simple circuit FM radio receiver comprises a step of regenerating rf, TR1, followed by a two-stage three audio amplifiers, TR2 to TR4. A critical part of the FM radio receiver is the first stage, TR1/VC1 where the wiring should be kept as short as possible. Coil L1 consists of 8 turns of the winding 1 mm (20 AWG) enamelled copper wire 6 mm in diameter L1 should then be thoroughly and uniformly stretched to a length of about 13mm. Read more Small Circuit Multiband Radio  FM Radio Receiver Circuit Diagram The tuning capacitor VC1 is one of two sections of a fm radio FM miniature, it is connected to the capacitor C1 22pF. The inductance value L2 rf is not critical, since anything 1μH to 10μH. The output is suitable for common headphones connected in series to provide an impedance of 64Ω. List of Transistors TR1 = BF199 TR2 TR3 TR4 == = BC547

This is a Simple Project of Remote Control Receiver Circuit Diagram. An infrared receiver, or IR receiver, is hardware that sends information from an infrared remote control to another device by receiving and decoding signals.This circuit is based on the Sharp GP1U52X IR module and 1NS8048L microprocessor. The GP1U52X is a hybrid IC/infrared detector that provides a strong clean signal for later filtering and demodulation. Remote Control Receiver Circuit Diagram

This is a simple design, can have excellent results, he is a recipient of regeneration, if you have never built any receiver, this is one you will build Easy. The circuit described is simple and has many limitations in sensitivity and selectivity, but is able to receive signals from radio amateurs (40m or 80m) in SSB and CW, and as output using a small headset crystal.  He will have a saturation if there are strong stations available on AM broadcast band of 41m at night.L1 is a small toroid T50-2 (red) with about 18 to 20 times (40m) or 35 to 40 times (80m) in the main winding connected to the FET with a single coupling circuit facing the antenna connection.  The center tap is about 20% of the primary winding. C1 is adjusted to set the radio band to the 40m and C2 then acts as a fine tuning within the band.The supply of 12 to 14V, R2 should be increased 5K6 or 6K8 output will be higher and similar sensitivity to-100dBm (about 2uV). Regenerative Receiver Circuit Diagram

The project is a user-friendly and cheap FM radio receiver which produces the desired audio signals using integrated circuit to achieve the pre-processing units. During operation, the user is allowed to change stations and interact with the receiver by integrating a keypad and an LCD for communication. There are several functions that this radio receiver can perform including adjusting the threshold when picking up stronger or weaker stations, setting up 3 favorite stations for quick tuning, scanning up/down for next strong signal station, and tuning up/down a frequency. A keypad is designed for controlling the receiver and the buttons are mapped to their corresponding functionality while the other buttons are not connected. The 4 main sub-components of the receiver include the LCD, the keypad, the favorite station storage, and the communication with receiver. Each of them is being controlled by their software components. The antenna transfers the incoming radio signal to the AR1010 F...

This Audio Receiver 433 MHz RF module using circuit diagram is very interesting, it is a module 433mhz RF common of those used in alarm or electronic gate, which was transformed into audio receiver and data simultaneously. The circuit consists of LM386 audio amplifier and the RF module requires a voltage of 4.5 to 5.5 volts and a very small current. Audio Receiver 433 MHz RF module using Circuit Diagram