the proximity of the boy was making his sister uncomfortable.
We use the IC1 555 in LPG gas detector to detect the leaking gases.
Yes, you can use a metal detector in the rain if....... The detector is made for underwater use. If the metal detector is made for land use, put a cover over the electronics housing. Many of the top manufacturers sell rain-proof covers. Be sure your headphones are waterproof!
no
Yep it does.
yes
To use the PLL (Phase Lock Loop) as FM detector, you need to know the Free-running frequency.
No - it's simply a 'proximity detector'. All it does is alert the driver to any obstacle that might be getting too close to the rear of the vehicle.
To use a smoke detector tester spray properly, follow these steps: Press the test button on the smoke detector to ensure it is working. Hold the tester spray about 6-12 inches away from the detector. Spray a short burst of the tester spray towards the detector. The smoke detector should sound an alarm within a few seconds if it is functioning correctly. If the alarm does not sound, replace the batteries or the detector itself.
motion detector
No.
NO why would there be