GAS leakage Circuit

Thread Starter

abdujellah

Joined Apr 24, 2016
5
Hello
I tried to simulate this circuit like a million time and it doesn't work :(
I really need it to work this week , i didn't find the SL100 Transistor so i replaced it with 2N222 . the LED is pulsing when the pin 4 goes high but the buzzer doesn't work . Can anyone try to simulate it in his computer and tell me what i did wrong?

Please help me

Thanks
 

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