radio general radio telephone mc5
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#communication
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#wireless
#audio
#transmitter
#receiver
#signal processing
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RF Remote Control With HT12E IC
The following circuit illustrates an RF Remote Control Circuit Diagram. This circuit is based on the HT12E IC. Features include the original data in parallel format, where the decoder IC receives the signal through the RF receiver module, utilizing an...
Telephone Ringer
This project is designed for individuals with large homes, expansive gardens, and young children. It is a telephone ringer that enables any mains-powered device to operate in response to the ringer of a fixed-line telephone. This device can control a...
A Low Power Wireless Audio Power Amplifier circuit
This low-cost project enables audio reproduction from a television without disturbing others. It eliminates the need for wired connections between the TV and loudspeakers. Instead, it utilizes invisible infrared light to transmit audio signals from the TV to the loudspeakers....
RF Actuated Keying Monitor
Sending Morse on a rig without a sidetone is not impossible, but is not particularly pleasant either. This battery-powered monitor has been designed to provide an audible indication of keying for those whose rigs lack a CW sidetone. Its sensor...
automatic loudness control circuit schematic
To achieve optimal audio reproduction at varying listening levels, it is essential to adjust tone control settings to align with the established characteristics of human auditory perception. The sensitivity of the human ear changes non-linearly across the entire audible frequency...
Reflex Radio Receiver
The RF signal is transmitted from the antenna through CI to a tuned circuit consisting of LI and C2. One end of L2 delivers the RF signal to the base of Q1 for amplification, while the other end connects to...
REMOTE TELEPHONE BELL RINGER
The telephone line extension bell ringer enables the addition of a remote ringer in locations such as a garage, where the sound of a ringing telephone may not be audible. Up to four ringers can be connected to a single...
THREE FREQUENCY AUDIO OSCILLATOR
The complete circuit diagram for the audio sine-wave generator is presented. Resistors R1 and R2 provide biasing to the non-inverting (pin 3) input of IC1, and their parallel resistance constitutes one component of the Wien network. They correspond to R1...
20M Cw Transmitter Circuit
The transmitter features a VXO circuit that drives a keyed amplifier. This keyed amplifier powers an MRF 476 final amplifier, producing approximately 2 watts of output. Additionally, a solid-state T-R switch is incorporated for the receiver. The component values provided...