Burglar Alarm Using Photodiode

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Sensors shall be of the solid-state photoelectric type and shall operate on the light scattering, photodiode principle. System battery voltages and charging currents shall be checked at the fire alarm control panel using the test codes and displayed on the LCD display. ... Fetch Doc

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DIY KIT 8. LIGHTALARM Protect your medicine cabinet, cash drawer or lolly cupboard with this light alarm. It will sound as soon as the drawer is opened and light falls on the Darlington photodiode. (But the frequency of response is different- ... Get Doc