I tried setting three to a fixed output using the resistors and instructions provided. There is no joy. A setting of 5V gives an output voltage of about 4.3V in all cases. I suspect that resistor tolerances are not very good and 4.3 volts when you need 5 volts is not acceptable. If you connect them to the VOM and adjust the output with a tiny potentiometer - they work great! Presumably anyone who wants to use them probably has the right testing equipment, so I guess it doesn't really matter. Don't worry about fixed voltage output options.
6FT HORUSDY Gas Siphon Pump With 1/2" Valve And Virgin Grade Tubing For Safe, Multi-Purpose Use (White)
22 Review
Portable Electric Vehicle Charger (40A, 240V, 25Ft Cable) - Level 2 EV Charging Station With NEMA 6-50P Plug-In For EVs By MUSTART
19 Review
Jack Pad Adapter Anodized Black Replacement For B-M-W 135 335 535 E82 E88 E46 E90 E91 E92 E93 E38 E39 E60 E61 E63 E64 E65 E66 E70 E71 E89 X5 X6 X3 1M M3 M5 M6 F01 F02 F30 F10(1 Pcs)
21 Review
Jack Pad Adapter Anodized Black Replacement For B-MW 135 335 535 E82 E88 E46 E90 E91 E92 E93 E38 E39 E60 E61 E63 E64 E65 E66 E70 E71 E89 X5 X6 X3 1M M3 M5 M6 F01 F02 F30 F10,Mini (3 Pcs)
24 Review
Rechargeable screwdriver OA-3,6F (433.0.2.00), 3.6 V, 1.3 Ah Li-ion, blister
46 Review
Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review
Cordiant Winter Drive 2 255/55 R18 109T
33 Review
Xiaomi Mi x Mijia Wiha Precision Screwdriver Set (DZN4000CN), 25 pcs
34 Review