Free Circuit Diagram

This is a simple circuit of programmable current source/regulator. This circuit is used to generate current. Here is the schematic diagram of programmable current source/regulator :

This circuit uses L 200 as main component. The error amplifier of this circuit is disabled by shorting pin 4 to ground. The value R is used to fix the [...]

Computer-controlled 4-20mA current loop is useful to control some industrial equipments.  By current loop, transmitting the signal over long distant should be resistant from noise interference.

This  computer-controlled 4 – 20mA is designed to operate on a single supply over a range of 3.3V to 30V.  The zero reference of 4 mA is set by R1 [...]

Thermocouples give many benefits compared to thermistor/RTD (Resistance Temperature Devices).  Some advantages of thermocouple are their wider temperature range, their reliability, and their consistency over long period of time. In some cases,  thermocouple calibration  is even unnecessary. Thermocouple temperature sensors are widely used in temperature controllers for boilers, oven,  pressurized reactor, even in high temperature [...]

XTR105 is a 4-20mA current loop transmitter integrated circuit, with two precision current sources. The Instrumentation amplifier gain inside this chip can be configured for a wide range of temperature or pressure measurements. This integrated circuit chip provides current excitation for platinum RTD temperature sensors and bridges, instrumentation amplifiers, and current output circuitry on a [...]

RCV420 is a special function integrated circuit chip for 4-20mA current loop receiver. RCV420 provide complete 4-20mA to 0-5V conversion, with 0.1% overall accuracy, 86dB CMR, and ±40V common-mode input range. This IC chip is suitable for many applications:

PROCESS CONTROL
INDUSTRIAL CONTROL
FACTORY AUTOMATION
DATA ACQUISITION
SCADA
RTUs
ESD
MACHINE MONITORING

Here is the schematic diagram of the basic 4-20mA current loop receiver [...]