4-20mA Current Loop Bridge Sensor Transmitter

Bridged resistive sensing elements is common in resistive type sensors/transducers. This sensor type need a biasing voltage to operate. LM10 provide low reference voltage, which is suitable for powering usually low resistance bridge type sensors such as strain gauges. The reference voltage is not only supply the power to the bridge but also provide offset to set the output at […]

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Voltage To Frequency Converter

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 by the voltage EC. The capacitor charges and discharges between 1/3 Vcc and 2/3 Vcc because NE555 is connected in […]

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