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1CommentsJoined January 12th, 2017

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  • radoslav006 commented on ptabone's instructable Raspberry Pi Cheap DIY ATX-Power Switch.5 months ago
    Raspberry Pi Cheap DIY ATX-Power Switch.

    Very poor designed schematic, it need to be improved.1. It is bad idea to connect Pi GPIO directly to the capacitor, becouse it acts like a short-circuit in transient conditions (a very long transient with such a big capacity).2. You should always use diode connected anti-paralell to the relay coil to protect the circuit from spikes.3. S3 switch should be rated to handle more current that typical tact-switch.

    This is very poor designed schematic. There are at least two good reason to say that.1. It is bad idea to connect Pi GPIO directly to the capacitor, becouse it acts like a short-circuit in transient conditions (a very long transient with such a big capacity).2. You should always use diode connected anti-paralell to the relay coil to protect the circuit from spikes.

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