Delay circuit diagram of energy-saving lamps

  
Delay saving lamps as shown is a sound and light control delay energy-saving lighting double. It can directly replace ordinary light switch without changing the original lighti
Delay circuit diagram of energy-saving lamps - schematic

ng circuits, day or strong light situations even greater sound can also control the bulb does not light, sound encountered at night or low light (such as voices, footsteps sound, etc.) after the lights turn on automatically, after about 30s (time can be set) automatically turn off. Suitable for staircases, corridors and other places lighting just short. Diode VD1 ~ VD4 bridge rectifier circuit composed of the city into a pulsating DC power, and then by limiting R7, VD5 regulator, C3 filtered output 8V DC, for the manifold CD4011 and provide power transistor VT7. Component selection: NAND gate D1 ~ D4 is available a 2-input NAND gate CD4011 four digital integrated circuits. VS is MCR100-8 type and other small plastic unidirectional thyristors. Rectifier diode VD1 - VD4 available 1N4007 type silicon rectifier diode ordinary, VD5 election 2CW56 type 8V zener diode, VD6 common type available 1N4148 silicon switching diodes, VT7 available 9013 type and other silicon NPN transistor. GR is MG45 photosensitive resistor, the remaining resistors are used RTX-1/8W carbon film resistors, wherein R1 is 22k, R2 is 22M, R3 is 33k, R4 is 47k, R5 is 1.5M, R6 is 5.10, R7 is 240k, RP take W106-2-2 type 100k glass glaze preset potentiometers. C1 with CT1 type ceramic capacitors, C2, C3 electrolytic capacitors C1 and take 0.1 F, C2 take 22 F/16V, C3 take 100 F/16V. B is CRZ2-113F type electret condenser microphone.




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