I have been wanting to try the common mini PIR HC-Sr505 from Ebay. But, I found the Delay was too long, about 10 seconds between Sense On and Off. I replaced the TC cap of 0.1uF (?) with 22pF - 100pF to speed up the Sense Toggles to 0.1sec - 1sec. This seems to perform its function. The only pro…

PIR HC-Sr505 usage

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