Op-Amp Temperature Sensing Circuit Design

@debosx

Hello! I'm a highly skilled PCB Designer with over 10 years of expertise in delivering reliable and efficient PCB designs. I specialize in creating precision designs tailored to client's needs, utilizing top-tier design tools such as Altium Designer, Autodesk Eagle, KiCad, EasyEDA, Siemens PADS, DipTrace, Allegro/OrCAD, Fritzing and Proteus. My goal is always to ensure the highest quality and performance in every project. Core Expertise : • Schematic Capture & Layout Design • Component Selection & Library Management • Reverse Engineering (PCB Replication, PCB Cloning) • Gerber, BOM, and CPL File Generation & Manufacturing Support • Design for Manufacturability (DFM) and Design for Assembly (DFA) • PCB Design & Development (Single, Double, Multi-Layer, Flexible PCBs) Industries Served : • Medical Devices • Telecommunications • Consumer Electronics • Industrial Equipment • Automotive Electronics • Safety and Security Devices Why Choose Me? • Attention to Detail and Commitment to Quality • Strong Communication Skills & Client-Centric Focus • Timely Delivery & Flexible Approach to Meet Project Requirements I would love to help you with your next PCB design project. Feel free to reach out, and let’s discuss how I can bring your ideas to life! Best Regards, Utpal

@muhammadz250

I can design and simulate your temperature sensing circuit using an Op-Amp in Multisim without any microcontroller. I will create a complete circuit with sensor + comparator + adjustable reference (potentiometer), calculate all voltage levels and verify the behavior for different temperature conditions. I will also perform a parameter sweep and match the results with theoretical calculations. You will get a working simulation, clear calculations and a well-structured explanation showing how the LED turns ON/OFF based on the threshold.

@alexsanderg3

Hi, there. I can develop a complete analog temperature sensing circuit using an op-amp, fully designed and tested in Multisim. The main challenge in this type of system is achieving stable and precise comparison, since small voltage changes or noise around the threshold can easily cause incorrect triggering. I’ve previously worked on similar analog designs involving temperature sensors, signal amplification, and comparator-based control systems, where stability and accuracy were key factors. For this project, I’ll use a reliable sensor like the LM35, amplify its output to a usable voltage range, and compare it against an adjustable reference set by a potentiometer. I’ll also include hysteresis in the comparator stage to eliminate flickering and ensure clean switching behavior. I will calculate all required voltage levels, simulate different temperature conditions, and perform parameter sweeps to validate performance across scenarios. You’ll receive a complete Multisim file, detailed calculations, and clear documentation explaining how the circuit works and how to adjust it for different temperature ranges. The final outcome will be a stable and practical circuit where the LED activates only when the temperature exceeds the desired threshold. Best regards.

@nayac68

Hi, I can design and simulate your temperature sensing circuit using an op-amp in Multisim, including calculations and parameter sweep. You’ll get a clean, working design with proper documentation.

@dakotac5

Hi, I can help you build a complete temperature sensing circuit using an op-amp comparator (no microcontroller), fully simulated in Multisim. What I’ll deliver: • Working circuit design (sensor + op-amp + LED) • Accurate calculations for threshold (~24°C) • Simulation results with test cases • Parameter sweep analysis

@aliviaz2

Hi, I can develop a complete, well-documented temperature sensing system based entirely on analog design using an op-amp comparator. Scope of Work • Circuit design using temperature sensor + op-amp • Reference voltage setup via potentiometer (~24°C threshold) • Full Multisim simulation with multiple test scenarios • Voltage calculations and theoretical validation • Parameter sweep to analyze system behavior • LED output verification under different conditions Enhancements (if needed) • Add hysteresis for stable switching • Improve noise immunity for realistic operation Deliverables • Multisim simulation file • Step-by-step calculations • Clear explanation of working principle • Final verified circuit

@ttobio69

Hi there, I read your project carefully, and yes, I can help design and simulate the Op-Amp based temperature sensing circuit without using any microcontroller. I can create the circuit in Multisim using a temperature sensor, Op-Amp comparator, adjustable potentiometer reference, and LED output. I’ll calculate the sensor voltage values around the 24°C threshold, compare high/medium/low temperature conditions, and verify the calculated results with simulation outputs. I can also perform the parameter sweep for the variable resistor to show how the output voltage changes as the reference temperature changes. The final result will clearly demonstrate the LED turning ON when the sensed temperature exceeds the set threshold. At this budget, I’ll deliver: -Multisim circuit design -Voltage/reference calculations -Simulation results -Parameter sweep analysis -Short explanation/report Cost: $30 || Timeline: 1–2 days I’d be happy to complete this cleanly and make the circuit easy to understand for presentation or submission. Best regards, Oluwatobi Okedairo

@kirllosatef

I have worked in multisim many times, and made a Solar Following Panel using just opamps without any controller I can provide matlab simulations.

@aRtEmIx404

Hello Sir, I can complete this project for you. Please, contact me to discuss the project in further detail. B/R Carlos.

@DenisLeeLarson

I have designed many such temperature circuits and can deliver you a reliable design based on your requirements. I would also suggest a second potentiometer to calibrate the temperature probe in an ice bath in order to guarantee the most accurate results. I would like to know what power source you have available so I can design appropriately. Would you also like an audio (alarm) output too?

@leed95

⭐⭐⭐⭐⭐ I have hands-on experience designing analog sensing circuits using operational amplifiers such as LM358 and temperature sensors like LM35, including comparator-based threshold detection systems without microcontrollers. I will design and simulate your circuit in Multisim, accurately setting the reference temperature (~24°C) using a potentiometer and calculating the corresponding voltage levels based on the sensor’s linear characteristics, then validate performance through multiple test conditions and parameter sweeps. The final design will ensure stable switching (with optional hysteresis to prevent flicker), clear LED indication, and full alignment between theoretical calculations and simulation results, delivering a reliable and educational temperature monitoring solution suitable for real-world applications.

@soumitrab22

Hi In principle this is a very simple circuit, assuming you are using an analog temperature sensor. So yes this is completely feasible and I've deployed such designs many times. Do you have any specific sensor in mind or are you open to suggestions ? Let me know and i'll have things ready for you in a few hours. Regards Soumitra

@patrickA123456

Hi, I am interested in your project. Of course that sounds like impossible, but I can do that. Contact me to discuss about successful result of the project. Have a nice day.

@pawank570

As a Electronics graduate, I have a strong background in electronics and circuit design, with experience in analog circuits, operational amplifiers, and simulation tools like Multisim. I’ve also worked on projects involving signal processing and system-level design, which helps me approach problems both theoretically and practically. Your project—designing a temperature sensing circuit using an Op-Amp without a microcontroller—is something I can confidently handle. I understand how to interface temperature sensors, set reference voltages using potentiometers, and use op-amps as comparators to trigger outputs like LEDs based on threshold conditions. I can design and simulate the complete circuit in Multisim, calculate the required voltage levels corresponding to temperature, and verify the behavior under different conditions. I will also perform parameter sweeps, compare theoretical calculations with simulation results, and ensure the circuit behaves reliably. The final deliverable will be a clear, well-documented design where the LED activates precisely when the temperature exceeds the set reference. I can definitely complete this efficiently and accurately.

@harshag23

Electronic Engineer with 3+ years of experience in hardware design and industrial maintenance. Expert in PCB layout (Altium), embedded systems (ESP32/STM32), and 3D modeling (SolidWorks). Proven track record in troubleshooting, PLC systems, and device validation at Iconic Device Pvt Ltd. A proactive problem-solver committed to high-quality engineering and international innovation.

@siddharths313

I have 5 year of experience in hardware design This can be done with a low cost TI opamp just making a comparator circuit with references voltage with the help of tlv431. I already design such hardware design logic with the opamp as a comparator .

@saravanan2926

I will design and simulate a robust, microcontroller-free temperature sensing circuit tailored for industrial monitoring. Leveraging my background in analog signal conditioning and reliable hardware, I will provide a precision-calibrated solution. My Deliverables: Multisim Schematic: A fully designed and simulated Op-Amp circuit. Precision Calibration: Exact voltage calculations for a 24°C trigger point via potentiometer. Validation Report: Results from a parameter sweep and test cases (High/Medium/Low) to ensure reliable LED activation

@Tejas1203

I can help you with this in a short time. I have a couple of questions that id like to discuss in detail Feel free to reach out the me

@nikki2201

Hello, I have experience in electronics and embedded systems, and I am familiar with analog circuit design, sensor interfacing, and simulation tools like Multisim. I can design and simulate the circuit as described, including the comparator-based op-amp configuration, reference voltage setup using a potentiometer, and LED output logic based on temperature threshold. I can also support parameter sweeps and provide clear documentation of the results. I would be happy to discuss the exact requirements and confirm the sensor type and specifications before starting.