New laser here, but is it bust?

[Bikerman (Chris Snowdon)]

@mcdanlj

You could put a large (exact value doesn’t matter at all) electrolytic capacitor across the motor terminals, or a (say) 1N4004 (or larger) diode across the motor terminals. You need to attend to polarity; if you get it backwards you’ll release the magic smoke that is meant to keep it working.

Sounds like a plan. I’ve actually got an Elegoo 4-channel relay somewhere…the one below.
https://www.amazon.com/ELEGOO-Channel-Optocoupler-Arduino-Raspberry/dp/B01HEQF5HU/ref=sr_1_5?dchild=1&keywords=5V%2Brelay%2Barduino&qid=1633801689&sr=8-5&th=1

[mcdanlj (Michael K Johnson)]

Yup, that looks like the same design, just with extra channels.