RTK.GPIO
thingiverse
A case for a RTK.GPIO with space for a 4 channel relay. RTK.GPIO https://www.amazon.nl/dp/B06VVQCBY6/?coliid=INCGKBC3RZX0N&colid=3K6W5F1GX8ADF&psc=1&ref_=lv_ov_lig_dp_it 4 channel relay https://www.tinytronics.nl/shop/nl/schakelaars/relais/5v-relais-4-channel-hoog-actief-of-laag-actief
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