PIR Motion Sensor Light 4 LED (Modified Delay Timer)

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tong
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PIR Motion Sensor Light 4 LED (Modified Delay Timer)

Post by tong »

01.jpg 02.jpg 03.jpg
tong
Site Admin
Posts: 2381
Joined: Fri 01 May 2009 8:55 pm

Re: PIR Motion Sensor Light 15 LED (Modified)

Post by tong »

BISS0001.png BISS0001

Pin 1 connect to VDD (+) = Retriggerable
Pin 1 connect to VSS (-) = Non-Retriggerable
tong
Site Admin
Posts: 2381
Joined: Fri 01 May 2009 8:55 pm

Re: PIR Motion Sensor Light 15 LED (Modified)

Post by tong »

11.jpg
Tx is LED On timer. 
Factory default is 6.6 second.

Tx = 24,576 x R20 (Ω) x C7 (F)
   = 24,576 x 15,000 x 18 nF x 10-9
   = 6.6 second
Ti is inhibit movement after LED Off timer. 
Factory default is 4.8 second.

Ti = 24 x R8 (Ω) x C8 (F)
   = 24 x 2,000,000 x 100 nF x 10-9
   = 4.8 second
Modified

This item connect Pin 1 to V+ So it already config as retriggerable.

Next modified R20 to 407K.
Tx = 24,576 x R20 (Ω) x C7 (F)
   = 24,576 x 475,000 x 18 nF x 10-9
   = 210 second
Next modified R8 to 2M + 100K in parallel.
Ti = 24 x R8 (Ω) x C8 (F)
   = 27 x 95,238 x 100 nF x 10-9
   = 0.25 second
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