Monthly Archives: May 2009

Small High Quality Audio Power Amplifier

Posted on May 28, 2009 by Adam
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

Audio Signal Injector and Tracer in One Circuit

Posted on May 28, 2009 by Adam
audio-signal-injector-tracer

If you are building or troubleshooting audio circuits, both audio signal injector and audio tracer is important tools. tracing audio signal means tapping a signal at certain point, and check if the signal is exist.  Here is the schematic diagram … Continue reading →

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Stepper Motor Control, No Microcontroller Needed

Posted on May 28, 2009 by Adam
motor-stepper-control

Stepper motor is a simple way to make a motion control with high precision. A stepper motor control circuit is needed to make stepper motor works. A stepper motor controller usually use a microcontroller to make a complicated task. Some … Continue reading →

Posted in Control Electronics | Tagged | Comments Off
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