Yh-305d: Power Supply Schematic

: An L7805CV is often used to provide a stable 5V rail for the digital display and microcontroller.

: A low-resistance shunt resistor is used to measure current, with adjustment trimmers (like VR10 for offset and VR11 for gain) allowing for calibration. Yh-305d Power Supply Schematic

Based on technical discussions and teardowns at the EEVblog Forum and Scribd , key parts include: : An L7805CV is often used to provide

: Upgrading the internal cooling fan for quieter or more efficient operation. Yh-305d Power Supply Schematic