so i have shared the it's schematic and board design with the eevblog.com community and they said "that this module will not work and the relay contacts and board tracks can't handle high current" I improved and made the board anyway and tested it with inductive and resistive loads and it works without a problem huh
(squints)
Looks fine up to about 6 amps I reckon, judging from the size of that relay. Not a huge high power coil on that so a simple npn transistor switching the coil to ground would be fine. Got a diode across the coil to catch the back-EMF, looks like all the basics are covered .Would only bother adding extra solder to the tracks for the relay contacts if I was doing it but that's neither here nor there.
Dunno what those eevblog folks are on about 🤷
forgot to include this