If you are creating your own PCB or point-to-point layout, these tools have been used successfully by the community to implement the Xin Zhi Zhao schematic updated:
Several verified KiCad projects are available on GitHub under the username “XZZ_Update_2024”—these include full Gerber files for the power supply board and driver board.
| Area | v1.0 | v2.1 (Updated) | |------|------|----------------| | Power regulation | Linear LDO only (5V→3.3V) | Switching pre-regulator + LDO (reduces heat) | | Signal input stage | Single-ended | Differential with common-mode filtering | | MCU interface | I2C only | I2C + SPI + UART selectable via jumpers | | Ground plane | Split analog/digital | Unified ground with ferrite bead separation | | Protection | Basic TVS on power | TVS + series resistor + clamping diodes on all I/O | xin zhi zhao schematic updated
The original had high inrush current; the updated schematic includes a CL-90 thermistor (120Ω cold) on the primary side. Omitting it stresses the rectifier and first capacitor.
The audio world has changed since the original Xin Zhi Zhao design hit the forums in the early 2000s. Here is why the updated Xin Zhi Zhao schematic is critical: If you are creating your own PCB or
Headline: Technical Update: Xin Zhi Zhao Schematic Revised
We have finalized the updates to the Xin Zhi Zhao schematic. This revision addresses [mention specific improvement, e.g., power delivery optimization / signal integrity / component placement]. Several verified KiCad projects are available on GitHub
Key Changes:
The latest version (v[Version Number]) is now available. Please ensure you are referencing the most recent file for your builds or analysis.
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