Category Archives: Test and Measurement

Precision Current Loop Thermocouple Transmitter

Posted on January 12, 2011 by Rust

Current loop analog data transmission is used in industrial environment because of its robustness (good noise immunity), while providing wiring fault detection (short and broken wiring) with a simple mechanism by detecting out range current level. In 4-20mA current loop … Continue reading →

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Voltage To Frequency Converter

Posted on January 11, 2011 by Rust

Using this circuit, we can accept positive or negative or differential control voltages. When the control voltage is zero, the output frequency is zero. To charge the timing capacitor C1 linearly, the 741 op amp forms a current source controlled … Continue reading →

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Variable Voltage Source is Adjustable Down to Zero!

Posted on January 8, 2011 by Rend

Variable adjustable voltage source is very important in electronic testing and experiment, no matter whether it’s just for hobby, professional research, or exploring new electronic circuit design. A very low voltage source sometimes is needed, and the following schematic diagram … Continue reading →

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