PIR Motion Sensor Light 15 LED (Modified Delay Timer)
Re: PIR Motion Sensor Light 15 LED (Modified)
TM2291
Pin 1 connect to VDD (+) = Retriggerable
Pin 1 connect to VSS (-) = Non-Retriggerable
Pin 1 connect to VDD (+) = Retriggerable
Pin 1 connect to VSS (-) = Non-Retriggerable
Re: PIR Motion Sensor Light 15 LED (Modified)
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
I cut out the blue line and connect Pin 1 to V+ but it short circuit the batteries V+ to Ground. It's possible that there is some track under the IC. So can't config as retriggerable.
Next modified R2 to 475K + 475K in series.
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