K1020 Electronic Siren Kit

K1020 Electronic Siren Kit – 555 Timer Sound & Frequency Project (Assembly Required)

The K1020 Electronic Siren Kit is a hands-on project that allows students to explore sound generation, frequency modulation, and circuit design. Using dual 555 timer ICs and a transistor amplifier, the circuit produces siren effects with selectable modes and adjustable pitch, making it ideal for engaging audio-based learning.

Key Features

• Dual 555 timer IC design for sound generation and modulation
• Selectable siren modes (‘Hee Haw’ and single tone)
• Adjustable pitch control via onboard switch
• Transistor amplifier stage for driving speaker output
• Compatible with standard or horn speaker for louder output
• Hands-on soldering and electronics project

What’s Included

• 1 × K1020 PCB
• 2 × 555 Timer ICs
• 1 × BD140 Transistor
• Electronic components (resistors, capacitors, DIP switch.)
Note: Speaker and battery may vary by kit version. Assembly required.

Curriculum Links

Australian Curriculum (v9.0):
• ACTDEK042 – Investigate how systems are designed and controlled
• ACTDIP050 – Implement digital solutions
Victorian Curriculum:
• VCDSTS039 – Technologies systems
• VCDTDI037 – Algorithm design and implementation
NSW (Stage 4–5 Technology Mandatory):
• TE4-2DP – Designs and produces solutions
• TE4-5AG – Applies problem-solving and evaluation

Classroom Use / Learning Outcomes

Students will:
• Generate and analyse audio frequency signals
• Understand timing circuits using 555 timer ICs
• Explore modulation and pitch variation
• Learn transistor operation and amplification
• Observe waveform behaviour using test equipment

Teacher Benefits

• Highly engaging audio demonstration project
• Covers multiple core electronics concepts in one build
• Supports practical experimentation and modification
• Links theory to real-world applications (alarms and sirens)

Perfect For

• Audio and sound electronics projects
• Timing and oscillator circuit lessons
• Intermediate soldering projects
• STEM and classroom learning