Alarm
DIY Simple Multitone Alarm
Here is the circuit diagram of simple multitone alarm. This is a low cost circuit which is simple and easy…
55 years ago
Door Knob Touch Alarm
This is door knob touch alarm for your home security purpose. The alarm will be activated when someone touch the…
55 years ago
Emergency Light + Alarm
This is the circuit diagram of emergency light included the alarm circuit to show you that there is no power…
55 years ago
Sound Effects Generator (8 different sound) based IC HT2884
This is the circuit diagram of sound effects generator. All sounds in this circuit are generated by HT2884. The HT2884…
55 years ago
Electronic Bird Chirp Sound Generator
This is electronic bird chirp sound generator circuit which used to produce a sound like bird's chirp. The transformer is…
55 years ago
Electronic Siren
This is Electronic Siren circuit diagram which use standard discrete components. The sound produced imitates the rise and fall of…
55 years ago