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I think somebody could find handy and useful these two shematics for interfacing Pic's projects using 24 volts dc and high current. Remember that BD680 can carry up to 4 Amps continuous duty, only with a proper thermal dissipator. Select fuse value to fit your current need.
Al.
In your output circuit is a fault drawn.
You have to swap the collector with the emmitor.
Otherwise your circuit is not working.
Thank you Mat for the correction. The schematic is wrong and I submit a new copy corrected.
To all interested, please ignore the download at post #1 and download the corrected schematics from this post.
Sorry for the inconvenience
Al.