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Velleman k2633 4 channel relay board kit 9vdc 300ma
velleman k2633 4 channel relay board kit 9vdc 300ma
Velleman k2633 4 channel relay board kit 9vdc 300ma
The connection of some relays to outputs of electronic circuits seems simple but in reality many problems can arise such as with the wiring this kit offers an attractive and compact alternative quick assembly and easy operation

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