To implement this feature:
The S36012’s potentiometer (RV1) is wired as a variable resistor in a voltage divider. The output voltage is set by: [ V_out = V_ref \times \left(1 + \fracR_topR_bottom\right) ] Where (V_ref) is typically 1.25V (for XL4016) or 0.8V for newer controllers. In the schematic: s36012 power supply circuit diagram
Rotating RV1 changes the division ratio, adjusting output from ~1.2V to 36V. To implement this feature:
| Reference | Part Type | Value / Rating | Function | | :--- | :--- | :--- | :--- | | F1 | Fuse | 10A / 250V Slow-blow | Overcurrent protection | | BD1 | Bridge Rectifier | 8A / 600V | AC to DC conversion | | C5, C6 | Electrolytic | 200V / 330µF (x2) | Bulk storage | | Q1, Q2 | NPN BJT | E13009-2 (or MJE13009) | Main switching transistors | | T1 | Main Transformer | EE42 core, 2+2 turn secondary | Voltage step-down / isolation | | IC1 | PWM Controller | TL494CN | Pulse width modulation | | IC2 | Optocoupler | PC817 | Isolated feedback | | IC3 | Shunt Regulator | TL431 | Precision voltage reference | | D15, D16 | Schottky Diode | MBR20100CT (x2) or 30A module | Output rectification | | L1 | Output Choke | 10µH, toroidal (yellow core) | Output filtering | | P1 | Trimmer Pot | 10kΩ | Voltage adjustment | | R33 | Current Sense | 0.01Ω / 5W | Overload detection | The S36012’s potentiometer (RV1) is wired as a
Do not exceed the MOSFET’s Vds rating. With an IRFB4110 (100V), you can raise input to 50V. However, you must: