How to Make Touch Alarm

Touch Switch Circuit For Doorbell Alarm Without IC

Touch Sensitive Doorbell Alarm switch circuit When touched the touch metal then the Alarm is switched ON and when Leave the finger from the touch plate then the Alarm is Automatically Switch OFF. This is very simple and easy because only three transistors and some other components are used, No IC required for this …

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Touch Alarm Switch Circuit using 555

Touch Switch

Touch Alarm This is a simple but interesting Project. In this circuit 555 timer is used. 555 timer ic is connected in Monostable mode. A Very high resistor is connected between Vcc and pin 7 . When touch the pin 2 then it is Triggered by the body because it get a negative pulse by …

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