Driving relays from GPIO - Raspberry Pi Forums

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i looking control pumps/motors home brew setup , thought cool raspberry pi. relatively new electronics come here seeking , advice. had looked quite while , kept reading needed buy type of board prevent frying pi, can no longer find these posts.

research have done appears can buy solid state relay , control directly pi gpio without need of else. according 1 website though said start mechanical relays since solid state ones expensive , lot easier damage. hoping can shed light on issue me.

need control 4 relays @ given time. need capable of turning device on uses normal household current 110ac. inexpensive , easy hook (tutorials excellent!). have suggestions or advice?

many similar questions: http://www.google.com/search?pseudoq=re ... tng=search


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