PIR Motion Sensor Light 15 LED (Modified Delay Timer)
Posted: Tue 13 Mar 2018 1:34 pm
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Tx is LED On timer. Factory default is 36 second. Tx = 40,000 x R2 (Ω) x C1 (F) = 40,000 x 180,000 x 5 nF x 10-9 = 4 x 1.8 x 5 = 36 second
Ti is inhibit movement after LED Off timer. Factory default is 5.8 second. Ti = 56 x R3 (Ω) x C2 (F) = 56 x 2,200,000 x 47 nF x 10-9 = 5.8 secondModified
Tx = 40,000 x R2 (Ω) x C1 (F) = 40,000 x 950,000 x 5 nF x 10-9 = 4 x 9.5 x 5 = 190 secondNext modified R3 to 100K + 2.2M in parallel.
Ti = 56 x R3 (Ω) x C2 (F) = 56 x 95,652 x 47 nF x 10-9 = 0.25 second