Free Simple Circuit Diagram
Ultrasonic sound wave can be generated using electronic circuit. This simple electronic circuit can generate an ultrasonic wave with frequency range of 12 to 50 kHz. Its very easy and quick to make this circuit. This circuit uses NE555 IC timer to drive a speaker. SPKR1 can be piezzo tweeter, etc. If you use a moving coil tweeter, then it […]
Read more
Metronome circuit is a much cheaper option compared to old mechanical metronome. With only few electronic components, we can build a low cost metronome. Here is the schematic diagram of the circuit: You can build it with veroboard, matrix board, or even with no board at all: just solder each component leads and cables directly. If you build without board, […]
Read more
Using very popular multivibrator 555 IC, we can build an alarm circuit which is similar to old ambulance siren. There are two sections inside the circuit, first is a low frequency oscillator for two level frequency modulation, and the second is the higher frequency oscillator for sound generation. Here is the schematic diagram of the circuit: The upper part is […]
Read more
Kids like the police or fire-brigade cars siren sound. This circuit can generate dual tone like Police or Fire-brigade cars siren sound. This circuit usually installed on battery powered cars, bicycles, and motorcycles. Not only that, but also can be installed in models and other games. Here is the schematic diagram of the circuit: Basically, this circuit utilize the IC1A […]
Read more