In the world of budget-friendly benchtop power supplies, the Wannien 101V0 has carved out a unique niche. Known for its compact size, adjustable voltage range, and surprisingly robust build quality for its price point, it has become a staple for hobbyists repairing smartphones, testing LEDs, or powering small circuits. However, like many mass-produced units, the Wannien 101V0 suffers from a common plague: a lack of official documentation.
AC INPUT: Live → Fuse (5A/250V) → Switch → Transformer Primary AC INPUT: Neutral → NTC Thermistor (5D-11) → Transformer Primary SECONDARY (Low Voltage Side): Transformer Secondary (0-12V-24V) → Bridge Rectifier (KBU810) → Capacitor C1 (4700µF/50V) → +V_Raw wannien 101v0 power supply schematic verified
CURRENT SENSING: Output Negative Terminal → Shunt Resistor (0.1Ω/5W) → Load_Negative Shunt Voltage → Op-Amp U1B (Pin5/Pin6) → Current Pot Adjustment In the world of budget-friendly benchtop power supplies,
CONTROL CIRCUIT (LM324): +5V_Ref → Voltage Pot (B10k) → Op-Amp U1A (Pin3) Output Voltage (Divider: R1=10k, R2=10k) → Op-Amp U1A (Pin2) Op-Amp U1A Output (Pin1) → Diode D1 (1N4148) → Optocoupler (PC817) AC INPUT: Live → Fuse (5A/250V) → Switch
This article provides the verified schematic details, explains the key components, and offers a troubleshooting guide based on real-world testing. Before we dive into the circuitry, let's address the elephant in the room. Why should you trust a "verified" schematic from a third-party source?