In this article, a temperature to voltage converter circuit converts temperature change into proportional voltage output. An NTC thermistor senses the temperature and the 741 op-amp converts the resistance change into a voltage signal, as the temperature changes, the output voltage also changes in a linear way. Therefore, this NTC thermistor based temperature to voltage […]
Heater and Temperature Controllers
Temperature Difference Based Relay Switch Circuit
A Temperature Difference Based Relay Switch Circuit compares the temperature of two different points and then switches a relay when the temperature difference reaches a set value. This circuit is useful in solar water heaters, cooling fans, battery temperature monitoring, incubators and industrial heat control systems. In this circuit, the LM741 operational amplifier works as […]
Op-Amp Based Diode Temperature Sensor Circuit
Temperature sensing is very important in electronic systems because many devices use temperature sensors to check heat and protect the circuit from damage. In this Op-Amp Based Diode Temperature Sensor Circuit, we used a simple 1N4148 diode as the sensing part and IC 741 as the signal processing unit. The circuit gives output voltage which […]
Temperature Sensing Alarm Circuit using Buzzer
We already see many temperature detector circuits in out previous blogs, but in this project we show a simple temperature detector circuit, here we use LM335 temperature sensor as good sensor IC and TL071 op-amp IC as comparator. Now, the circuit senses temperature and then gives alert using buzzer when temperature crosses set level, so […]
Car Engine Heat Detector Circuit with Sound Alert
Like in previous post on Automobile Engine Overheat Alert Circuit using LED, where driver gets indication through LED, but in this circuit, driver gets alert through sound and this sound comes from IC 555, which works as astable multivibrator and generates sound signal, also we can adjust temperature level for alarm using variable resistor which […]
Automobile Engine Overheat Alert Circuit using LED
Many a times, automobile engine heat problem has become very common, engine gets too hot and driver is not aware of it early, because of this, engine damage can happen and repair cost becomes high, so we need simple system which can give early warning. This project shows a small and low cost heat alert […]