USB to PIR to LED-string interface PCB.

A useful little interface that plugs onto one of the many cheap PIR modules on eBay and lets a power bank drive strings of LED lights when someone is in the vicinity.
Note that this will not work with the power banks that require a continuous high load.

Here's a link to the many cheap eBay PIR modules:-
https://www.ebay.com/sch/i.html?_from=R40&_nkw=pir+module&_sacat=0&LH_BIN=1&_sop=15

A link to the PCB file and info on how to use it:-
http://www.bigclive.com/freebies.htm

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