Category Archives: Audio and Music

Featured Posts

MAX1703 Single-Cell Boost Converter Circuit

When you design a circuit with only a single-cell battery, you will need boost-converter to provide enough voltage for most ...

Read More

55MHz Scope Sensitivity Amplifier

Scope sensitivity amplifier is a vital front-end signal processing for every scope instruments. The function of this circuitry is simple: ...

Read More

Two-Band Bxandall Active Tone Control

Using active circuit for tone control means that we can provide cut and boost, maintaining overall amplifying factor of original ...

Read More

Pulse Width (PWM) Controller Circuit

A LM3900 quad operational amplifier can be used to build a pulse width (PWM) controller. The LM3900 was chosen because ...

Read More

Small TV Modulator Using A Motorola MC1374

How can television modulator be small and simple like this? First, it uses integrated circuit, and the second, any TV ...

Read More

Dual Tone Single IC Siren

Dual Tone Single IC Siren

This circuit is a double tone Police sound and Single tone old ambulance sound. This circuit is usually installed on a on battery powered cars, motorcycles, and bicycles for fun kid not only that, this circuit also used inĀ  models … Continue reading

Posted in Audio and Music, Security | Tagged | Comments Off on Dual Tone Single IC Siren

1.5V LED FLasher Using 3 Transistors

low-voltage-led-flasher-transistor

To make LED works, you need a voltage source that is higher than the LED’s forward bias voltage, and it’s higher that 1.5V (around 2V for red LEDs). Fortunately, now you can make a LED flasher circuit that needs only … Continue reading

Posted in Audio and Music, Lighting and LED Circuit | Tagged | Comments Off on 1.5V LED FLasher Using 3 Transistors

Small High Quality Audio Power Amplifier

small-amplifier-lm386

This audio power amplifier is very good for your portable devices, or for your headphones amplifier. The circuit of this audio power amplifier is very simple, consist of only seven components. Here is the schematic diagram of the amplifier circuit: … Continue reading

Posted in Audio and Music | Tagged | Comments Off on Small High Quality Audio Power Amplifier

Wailing Alarm Siren

wirling-alarm-sirene

This alarm siren circuit give continuous frequency sweep, a warbling sound. The warbling period is about 6 seconds, 3 seconds for frequency sweeping up and 3 seconds for frequency sweeping down. You can change the warbling frequency of this alarm … Continue reading

Posted in Audio and Music | Tagged | Comments Off on Wailing Alarm Siren
« 1 ... 11 12 13 14 15 16 17 18 19 20 21 22