17 May
2022
17 May
'22
12:02 a.m.
The relay boards are marked "2 Relay Module" "2PH63091A" . Each relay has 3 screws labeled "NO" "COM" "NC" and 4 header pins. The header pins are labelled "JD-VCC" "VCC" "GND" / "GND" "IN1" "IN2" "VCC" . One of the boards has a removable jumper bridging JD-VCC and VCC.