How to make security alarm device using a transistor Share Share What you need to build this security alarm - Mosfet IRFZ44N - resistors 47K - Buzzer 5V - Wires. -9V battery - download circuit |http://j.gs/9aF8 Follow Me https://www.facebook.com/Easyonee https://twitter.com/Eaasyone https://www.instagram.com/easyyone
