: Swapping the factory BJT switches in the current sense circuit for MOSFETs like the 2N7000 for better linearity.
The is a linear DC bench power supply capable of providing an adjustable output of 0–30V and 0–5A . Known as a common entry-level laboratory tool, its story is one of simple design, accessibility, and the occasional need for enthusiast-led modifications to improve its longevity. The Core Architecture The schematic of the Yh-305d Power Supply Schematic
: An L7805CV is often used to provide a stable 5V rail for the digital display and microcontroller. : Swapping the factory BJT switches in the
Based on technical discussions and teardowns at the EEVblog Forum and Scribd , key parts include: The Core Architecture The schematic of the :
: Fixing "dry" or intermittent solder joints that can cause the supply to fail or output incorrect voltages. Be aware: Yihua YH-305D bench PSU - EEVblog
: To minimize heat dissipation across the pass transistors, the circuit uses relays that switch between different transformer taps at specific voltage thresholds (e.g., 8V, 16V, and 24V).