RDA5807 FM 87-108MHz Radio Receiver LCD1602 DIY Kit

This document describes the RDA5807 FM 87-108MHz Radio Receiver LCD1602 DIY Kit, a self-assembly kit designed for enthusiasts to build their own FM radio receiver. The kit features an RGB spectrum indicator that flashes automatically and a blue LCD1602 display screen for clear frequency indication.

Function Description

The RDA5807 FM Radio Receiver DIY Kit allows users to construct a functional FM radio. It incorporates a built-in volume adjustment, an RGB spectrum indicator for visual feedback, and a 5W power amplifier for audio output. The device supports a receiver frequency range of 87.0MHz to 108.0MHz, enabling reception of standard FM radio stations. The LCD1602 display screen provides a clear visual representation of the currently tuned frequency.

The kit's operation is straightforward:

Power ON/OFF: The left button is used to toggle the power supply.
Spectrum Indicator Control: The right button controls the ON/OFF state of the RGB spectrum indicator.
Volume Adjustment: The "S+" and "S-" buttons are used to increase or decrease the volume, respectively.
Frequency Tuning: The "P+" and "P-" buttons allow users to adjust the receiving frequency and tune into different FM stations.

Important Technical Specifications

The RDA5807 FM 87-108MHz Radio Receiver LCD1602 DIY Kit boasts several key technical parameters:

Product Name: RDA5807 FM 87-108MHz Radio Receiver LCD1602 DIY Kit
Work Voltage: DC 4.5V~5.5V
Output Impedance: 4ohm
Output Power: 5W
Output Channel: Mono
Receiver Frequency: 87.0MHz~108.0MHz
Frequency Accuracy: 0.1MHz
Equivalent Noise: >=30dB
Work Temperature: -40℃~85℃
Work Humidity: 5%~95%RH
Size (Installed): 907055mm

The kit includes a comprehensive list of components necessary for assembly, such as various metal film resistors (10ohm, 100ohm, 6.8Kohm, 1Kohm, 10Kohm), the RDA5807 FM Receiver (SMD), a crystal oscillator (11.0592MHz), IC sockets (DIP-8, DIP-40), ceramic capacitors (22pF), monolithic capacitors (0.1uF 104), KA2284 LED drivers (ZIP-9), RGB LEDs (5mm), DuPont female and male sockets (16Pin), electrolytic capacitors (4.7uF, 100uF), a DC-005 power socket (5.52.5mm), self-locking buttons (5.85.8mm) with red caps, black buttons (6620mm), an LM386N IC (DIP-8), an STC89C52RC IC (DIP-40), an LCD1602 display screen (blue), a 75ohm antenna (25cm), a 4ohm 5W speaker (22mm), red/black speaker wire (20cm), and a USB-DC005 power wire (100cm). Mechanical components include an acrylic board, M310mm copper pillars, M310mm, M38mm, and M36mm screws, and nuts. The PCB itself measures 82641.6mm.

Usage Features

The RDA5807 FM Radio Receiver is designed for ease of use once assembled. Its compact size (907055mm) makes it portable. The blue LCD1602 display ensures that the current frequency is always visible. The RGB spectrum indicator adds a dynamic visual element to the listening experience, flashing automatically to enhance user engagement. The built-in 5W power amplifier provides sufficient audio output for personal listening.

As a wireless module, it is important to note that the device should not be used in environments with significant signal interference to ensure optimal reception quality.

Maintenance Features

The kit is primarily a DIY assembly project, and maintenance largely revolves around proper installation and handling of components.

Soldering: Users need to prepare welding tools, including a soldering iron (<50 Watt), rosin core ("radio") solder, wire cutters, wire strippers, and a Philips screwdriver. It is crucial to avoid prolonged contact of the soldering iron with components (no more than 1.0 second) to prevent damage.
Component Orientation: Careful attention must be paid to the positive and negative terminals of components, as well as their correct installation direction and placement on the PCB. Incorrect installation of LEDs, for example, will prevent them from lighting up. Complex components should be installed preferentially.
ESD Precautions: When installing electronic components, it is recommended to wear anti-static gloves or wristbands to prevent electrostatic discharge damage.
SMD Components: The kit includes SMD (Surface Mount Device) components, which require careful placement and tinning on the PCB.
Capacitor Installation: Electrolytic capacitors require attention to polarity (longer pin is positive). They should be placed horizontally, maintaining a 2mm distance from the PCB during installation.
Antenna Installation: The 75ohm antenna should be installed on the back of the PCB, maintaining a distance of more than 5mm from the PCB, and fixed by tin (not screws).
Speaker Connection: The speaker connects to the PCB via 20cm red/black cable, and polarity does not matter for the speaker connection.
Acrylic Shell: Before final assembly, the protective film on the surface of the acrylic shell should be removed.

The installation process is detailed step-by-step, covering the placement and soldering of each component, from the RDA5807 FM Receiver SMD to the final assembly of the acrylic casing and speaker. This detailed guidance aims to minimize errors and ensure a successful build.

ICStation RDA5807 - Page 26

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