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When light falls on the surface of ldr, the ldr changes its resistance. Web how to make a simple solid state relay using an led, a ldr and resistor. Web by samidha verma ldr circuit diagram light dependent resistor or photo resistor is a device whose resistance is dependent on the strength of the light as they are composed.
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The more the light, the less the resistance. Web here ldr acts as shadow sensing devices and makes turn on or off the relay when ever it detects the shadow and keep the relay in either on or off condition until the next. When light falls on the surface of ldr, the ldr changes its resistance.
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Web ldr darkness sensor circuit. Web this basic light sensor circuit is of a relay output light activated switch. A potential divider circuit is formed between the photoresistor, ldr and the resistor r1.
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Web in a “ladder” diagram, the two poles of the power source are drawn as vertical rails of a ladder, with horizontal “rungs” showing the switch contacts, relay contacts, relay coils,. Web a very simple circuit is used to obtain the dc voltage required for the light operated relay circuit to work. Web by samidha verma ldr circuit diagram light dependent resistor or photo resistor is a device whose resistance is dependent on the strength of the light as they are composed.
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Web how to make a simple solid state relay using an led, a ldr and resistor.
