Category Archives: Test and Measurement

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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 ...

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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: ...

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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 ...

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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 ...

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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 ...

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Extending 555 Timer’s Delay with Integrator

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

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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50 kHz FM Optical Receiver

Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself¬† might employs different methods, and this circuit uses free air optical medium. This optical receiver circuit is built using a L14G2 … Continue reading

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High/Low Voltage Probe

Simple voltage probe circuit shown in the schematic diagram below very useful in testing, testing, or troubleshooting discrete¬† or integrated circuits, especially logic circuitry. This voltage probe circuit gives two indication, “high” or “low”. Here is the schematic diagram of … Continue reading

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