Features & Specs

Input / Output: 230V AC to 5V DC (up to 2A / 10W)
AC Side Protection: Slow-blow 250mA fuse (F1), 73°C thermal fuse (F2), and 7D471K MOV varistor (RV1) for overvoltage spike suppression
DC Side Protection & Filtering: JK30-110 resettable PTC fuse (F3), 470µF bulk electrolytic capacitor (C1), and 100nF ceramic decoupling capacitor (C2)
Isolation: Optically and transformer-isolated primary to secondary side via the HLK module

⚠️ High Voltage Warning: Mains voltage (230V AC) can be lethal. Ensure proper clearance, isolation, and enclosure before powering

Bill of Materials (BOM)

U1: HLK-10M05 — Isolated AC-DC Step-Down Power Supply Module (230V AC to 5V DC, 10W / 2A)
J1: 2-Pin Screw Terminal Block — AC Input
J2: 2-Pin Header / Connector — 5V DC Output
F1: T250mA — Time-delay / Slow-blow Fuse (250mA, 250V AC)
F2: 73C — Thermal Cutoff / Thermal Fuse (73°C)
F3: JK30-110 — PPTC Resettable Fuse (30V, 1.1A hold current)
RV1: 7D471K — Metal Oxide Varistor (MOV surge protection)
C1: 470µF / 16V — Electrolytic Capacitor
C2: 100nF / 50V — Ceramic Decoupling Capacitor

For detailed step-by-step instructions on milling and isolating PCBs on a desktop CNC machine, watch Makera's official guide: