schematics simple fm radio receiver

This circuit is designed to be used in conjunction with the standard 4 foot square loop used in MW for long distance reception. The circuit described is intended for use with a 4-foot square loop antenna, which is a common choice...

Tuned Rf Wavemeter

L1 and L2 form a tuned transformer with an optimum turns ratio of approximately 1:3. L2 and C1 are used to tune to the desired frequency. The frequency range can extend from 10 kHz to over 200 MHz, depending on...

One Transistor FM Radio With Improved Audio Gain

The following circuit presents a schematic diagram for a one-transistor FM radio with enhanced audio gain. Features include a super-regenerative design. The one-transistor FM radio circuit utilizes a super-regenerative architecture, which is known for its simplicity and efficiency in receiving FM...

A Compact Co-Planar Waveguide-Fed Zeroth-Order Resonant Antenna

The zeroth-order resonant (ZOR) antenna, constructed using microstrip transmission lines, has gained significant attention in small antenna applications. Various techniques have been utilized to miniaturize the composite right/left-handed (CRLH) transmission line (TL) unit cell size, such as employing meander line...

Receiver Audio Circuit

This simple receiver AF amplifier can supply several hundred milliwatts to an 8-ohm speaker. The gain is approximately 200X. If high gain is not required, C2 can be removed, resulting in a gain of 20. R1 and C6 are essential...

Rf power meter

The reflectometer (SWR power meter) operates across three decades, ranging from 100 kHz to 100 MHz. It can be designed to handle RF power levels as low as 500 mW and up to 500 watts. The reflectometer, also known as a...

guitar and bass tuner

The core component of the circuit is IC2, a 50240 top-octave generator. This device utilizes a single input frequency to produce all twelve notes of the musical scale. The input signal is generated by IC1, a 4001 quad 2-input NOR...

ANTENNA DESIGN FOR FM TRANSMITTER

Two aluminum rods, each of length "L" in meters, are connected through an insulator as illustrated in the figure. A 75-ohm cable is fed from the center, similar to a conventional TV antenna. This configuration describes a basic antenna system utilizing...

RF Decibel Meter

This is a zine dedicated to electronics circuit diagrams, DIY (do it yourself) electronics projects, electrical electronics data sheets, and microcontroller projects for hobbyists, students, consultants, and product designers. The zine serves as a comprehensive resource for individuals interested in electronics,...