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  1. 02-05-2017 #7
    A_Camera's Avatar
    Lives in Where my home is, Sweden.
    A_Camera
    Last Activity: 4 Weeks Ago Has been a member for 8-9 years. Has a total post count of 709. Received thanks 103 times, giving thanks to others 40 times.
    Quote Originally Posted by cropwell View Post
    The 555 can source or sink up to 200mA, so should be OK to operate most relays directly. The 555 is a useful timer chip, but I tend to use arduinos, especially for really long delays.

    Cheers,

    Rob
    ...but 12V 6.5W is over 500mA, so if he is going to use the solenoid on the picture he needs a transistor, or a small relay in between the valve and the 555. The 555 is OK for small relays but not for solenoids.
    Last edited by A_Camera; 02-05-2017 at 12:20 PM.
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