Here is the circuit diagram of simple multitone alarm. This is a low cost circuit which is simple and easy…
This is door knob touch alarm for your home security purpose. The alarm will be activated when someone touch the…
This is the circuit diagram of emergency light included the alarm circuit to show you that there is no power…
This is the circuit diagram of sound effects generator. All sounds in this circuit are generated by HT2884. The HT2884…
This is electronic bird chirp sound generator circuit which used to produce a sound like bird's chirp. The transformer is…
This is Electronic Siren circuit diagram which use standard discrete components. The sound produced imitates the rise and fall of…