Category Archives: Test and Measurement

Spectrum Analyzer Adapter for Oscilloscopes

Posted on July 5, 2011 by Rend

The circuit shown in the following schematic diagram is a simple spectrum analyzer adapter circuit for oscilloscopes. This circuit can be used for scanning or monitoring a segment of radio spectrum or amateur band.  Inside this circuit,  an NE602 mixer … Continue reading →

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Extending 555 Timer’s Delay with Integrator

Posted on June 7, 2011 by Rust

555 IC is very popular component for timer circuit. With integrator circuit, we can extend the timing period of 555IC timer with reasonable capacitor size. With conventional 555IC timer configuration, the timing capacitor will be large compared to integrator version. … Continue reading →

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LM3915 Vibration Meter

Posted on May 31, 2011 by Rust

A vibration meter circuit shown in the following schematic diagram uses LM3915 a the main active component. This vibration meter uses a piezoelectric transducer to pick up the vibration. The logarithmic characteristic of LM3915 make this meter circuit works for … Continue reading →

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