Review on 🔌 DROK 24V Power Converter Module - 4A 100W Switching Power Supply Board with Variable Input, AC 85-265V, Indicator - Industrial Grade Switching Power Supply by Phil Oliveira

Absolutely no instructions. There are no markings on the circuit board to inform the user which side is AC and which side is DC. Looks nice. However, until the seller publishes important BASIC information, it remains unused on my desk. UPDATE: I found a diagram showing AC and DC connections on a foreign website. As suggested, AC should be connected to the green plastic block (next to the soldered fuse). I stress HOW SUSPECT - SEEMS obvious but I wasn't sure. Comparing the PSU with the schematic, the AC LED is blocked by the heatsink (therefore it is not visible on the product itself). This is not the seller's fault, but data on these anomalous markings should have been provided. If it works as intended, I can assess it better. UPDATE 2: The converter works as advertised. I intend to use this with an audio amplifier module. However, I hear a slight hiss when the audio amplifier module is on (no music is playing). I'm not an electronics expert, so I don't know if the hissing noise you're hearing is coming from the converter or the module. The converter supplies power to the module. Accordingly, the rating of this topic has increased.