Category: Test and Measurement

Water Level Sensor/Alarm System for MAXQ3210 Controller

The MAXQ3210 ia a powerful RISC microcontroller. This device have features and capabilities to make it compatible for battery-powered applications that detect a condition and sound on alarm. Piezoelectric horn driver, 5V to 9V regulator, and analog voltage comparator support a minimal component count system are integrated on this microcontroller. Additionally, this microcontroller is allowed to operate for significant periods […]

Read more
Category: Test and Measurement Tags:

INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit

This is a INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit. This circuit uses OPA340 because it has near rail-to-rail input and output swing ranges that allow the output voltage of the circut to approach 0 and 5V. The gain of OPA340 is set to +100 and the INA159 gain is +0.2V/V. This circuit has gain of +20V/V. Here is the circuit : […]

Read more
Category: Control Electronics, Test and Measurement Tags:

Single Power Supply Cold Junction Compensation

Cold junction compensation in thermocouple is needed when the cold junction is not kept on a constant temperature. Rather that to provide temperature stabilizer on the junction, correcting the error by measuring the cold junction temperature is cheaper. Here is one of the circuits  for  such solution: We can follow these steps to adjust the circuit: Adjust R1 for the […]

Read more
Category: Test and Measurement Tags:

Thermocouple Cold Junction Compensation (Compensation for Grounded Thermocouple)

Cold junction error in thermocouple can be seen as an offset drift that depend on the cold junction temperature. we can use the following circuit to correct this error for grounded thermocouple configuration: Adjustments: compensates for both sensor and resistor tolerances Short 1N4568 Adjust R1 for SEEBECK coefficient times the ambient temperature (in K degrees) across R3. Short LM135 and […]

Read more
Category: Test and Measurement Tags:
1 … 21 22 23 24 25 … 29