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jeffl123
modified 9 years ago

Circuit alarm with LDR and Laser Circuito de Alarme com LDR e Laser

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06:53:30
R1 (168 m omega) simulates LDR illuminated by the laser. R2 (1k omega) simulates LDR unlit. To simulate something interrupted the laser to reach the LDR sensor, just tap the small switch next to R2 (1k omega) high LDR resistance produces (when deleted) cause the thyristor module (Transisto NPN + PNP) between an infinite loop triggering the relay that can be used to feed a hooter for example. In the scheme, used the same source (12v) to feed hooter (feel free to use even an external power). To make the relay off break the infinite loop, just touch the small key down (to right) to restart the system. R1 (168 m Omega) simula LDR iluminado pelo laser. R2 (1k omega) simula LDR apagada. Para simular algo interrompeu a laser para alcançar o sensor LDR, basta tocar no botão pequeno ao lado R2 (1k omega) elevada resistência LDR produz (quando apagados) fazer com que o módulo do tiristor (Transisto NPN + PNP) entre num ciclo infinito provocando o relé que pode ser utilizado para alimentar uma buzina por exemplo. No esquema, usou a mesma fonte (12v) para alimentar hooter (sinta-se livre para usar até mesmo uma fonte de alimentação externa). Para fazer o revezamento off quebrar o loop infinito, basta tocar na tecla pequena para baixo (para a direita) para reiniciar o sistema.
published 9 years ago

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