I am using this one and it works on its own. It reliably clicks. Is this proof that I don’t need extra power? https://www.exp-tech.de/module/relais/4261/5v-2-channel-relay-shield-fuer-arduino?gclid=EAIaIQobChMI49uMzu2s2gIV7Z3tCh1UyQ1FEAQYASABEgKLX_D_BwE
Any info about MISO?