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Low-cost Night Lamp

Low-cost Night Lamp

+IC47809123IC378121231312414-+N1109118-+N2BR1++2536481IC1NE555RELAY (RL1) CONTACTSRL112V, 200Ω1C/O RELAYD41N4007C347μ25VD11N4148IC1(N1-N2) = LM324R1110KR23WVR247KR1010KVR3100K6V4.5AhBATT.S1ON/OFFSWITCHR11KZD13.6VZENERLED1C20.1μT4BC337C10.22μC50.22μC41000μ25VBR11A12V230V AC50HZX1X1230V ACPRIMARYTO 12V, 750mASECONDARYTRANSFORMERVR1100KC60.1μC70.1μT1BC547T2BC547LDR1LED2-LED9 = WHITE LEDsR547KR310KR42KC80.1μC810μ16VC90.01μT3BC337R61KLED2R710Ω1WR81KR9560ΩD21N4148OVERCHARGEDEEP DISCHARGEUPPER LIMT SETLOWER LIMT SETN/ON/CLED9LED8LED3Low-cost Night Lamp
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publish time: 2020-10-26
Circuit Everyday

This is an ultra-sensitive LPG sensor that beeps when it senses any gas leak.It can detect LPG vapors between 200 and 10,000 PPM and drive a piezoelectric buzzer to attract attention and take immediate action.The buzzer beeps until the concentration of gas in the air drops to a safe level.The circuit USES an MQ6 gas sensor designed to detect LPG, propane and isobutane gases.

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