Xhdata D-808 Schematic 'link' Jun 2026

The MCU communicates with the Si4735 via an I2C serial bus.

: An IF of 10.7 MHz is achieved using a Princeton Tech FS8308 PLL , which is then fed into the Si4735. Audio Power Amplifier : Uses a CS4863 (clone of LM4863).

After demodulation by the DSP, the audio signal leaves the main IC as a low-voltage analog signal. The output stage is a classic analog design.

The MCU reads the front-panel matrix keyboard, the optical tuning encoder, and controls the LCD background display. xhdata d-808 schematic

Low-dropout (LDO) linear regulators reduce the erratic battery voltage down to stable 3.3V and 1.8V rails required by the MCU and DSP chips.

The XHDATA D-808 holds a special place in the community. It is often considered a "clone" or inspired by the , but with better internals and a lower price point. However, its popularity has generated some key user insights regarding the schematic:

The is a highly-regarded portable digital radio known for its use of Digital Signal Processing (DSP) and high sensitivity across FM, SW, MW, LW, and AIR bands. Its internal design is centered around the Silicon Labs Si4735 DSP chip, which handles demodulation for all supported modes, including Single Sideband (SSB). Internal Architecture and Variations The MCU communicates with the Si4735 via an I2C serial bus

: The external antenna jack is typically wired only for FM and Shortwave (SW). Modifications are often required to enable external antennas for Mediumwave (MW). Revision History (PCB Versions)

The XHData D-808 is a hardware drum machine produced by XHData (a Chinese electronics manufacturer) as a compact, budget-friendly clone/reproduction of classic Roland TR-808-style circuitry and layout. Its schematic reflects simplified TR-808-inspired analog sound-generating circuits, digital sequencing/control elements, power regulation, and user-interface wiring. Below is a thorough, component-level walkthrough of typical sections and design choices found in the D-808 schematic, focusing on signal flow, key subcircuits, and practical notes for repair/modification.

The D-808 uses common ICs. Find their datasheets and you can infer much of the circuit: After demodulation by the DSP, the audio signal

The device operates using a single high-capacity 18650 Lithium-ion power source. The power schematic manages step-down linear regulation to provide clean voltages to vulnerable audio components and digital stages.

Characterised by a Micro-USB port and often a blue or orange screen.

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