DI-56 - 19.2 W DC-DC Converter

Schematic PCB

DER-453 - 45 W single output secondary-side regulated converter

Schematic PCB

1117 Simple board for voltage regulator

2 Layers PCB 14.8 x 24.8 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;For SMD 1117 Set Voltage O/P Regs - LED Indication

Schematic PCB

BPW34 photodiode acts as a solar cell to make a supercapacitor watch (schematic diagram, etc.)

The standby time is acceptable and in good condition, more than 7 days.

Schematic PCB