PC RS232 thermometer circuit
To achieve the desired functionality of measuring outdoor temperature via a PC, a simple and cost-effective circuit can be designed. This circuit typically consists of a temperature sensor, such as the LM35 or DS18B20, which provides an analog or digital output corresponding to the temperature. The sensor is connected to a microcontroller, such as an Arduino or Raspberry Pi, which serves as the interface between the sensor and the PC.
The temperature sensor is placed in an outdoor probe, ensuring it is protected from environmental factors while maintaining accurate readings. The microcontroller reads the temperature data from the sensor and converts it into a format suitable for transmission. For a serial connection, the microcontroller can utilize its UART (Universal Asynchronous Receiver-Transmitter) capabilities to send the temperature data to the PC.
The PC can then receive this data through a serial communication interface, such as a USB-to-serial converter, enabling real-time temperature monitoring. Software running on the PC, which can be developed in various programming environments such as Python or C++, will interpret the incoming data, providing a user-friendly display of the temperature readings.
This circuit design is not only straightforward but also offers flexibility in terms of sensor choice and communication protocols, allowing for customization based on specific requirements. By utilizing readily available components, this system can be constructed at a significantly lower cost than commercially available solutions, while still providing reliable performance.We’d like to be able to use a PC to measure the temperature outside. Ideally this would be a serial connected device with a probe that could easily be placed outside. Google found us some, but there seem to be very complex and cost around $100! 🔗 External reference
Related Circuits
A very simple DIY crystal oscillator circuit that uses a quartz crystal for frequency stability and a suitable RF transistor. It employs a second or third harmonic crystal for operation. This DIY crystal oscillator circuit is designed to generate stable...
A straightforward intercom circuit designed using transistors. It does not require a changeover switch and can be used similarly to a telephone. This intercom circuit utilizes transistors to facilitate communication between two or more stations without the need for complex...
High pressure alarm with high sensitivity. It detects high-voltage electric energy from 10kV at a distance of 2m or from low-voltage mains (AC 220V) at a distance of 0.3m. The alarm device is simple to manufacture, compact, and user-friendly....
This design circuit is for audio graphic equalizers, which are commonly found as commercial products, yet published circuits for them are quite rare. The circuit features a simple design that requires an operational amplifier (op-amp) to amplify the input...
This flip-flop circuit functions as a free-running astable multivibrator, where the bases and collectors of both emitter-biased transistors are directly coupled. The switching action is facilitated by a capacitor in each emitter circuit, resulting in the generation of triangle...
The LM1830 low-level detector can utilize an audio indication (speaker) or a visual indicator (LED - light-emitting diode) that activates when the level is too low. This low-level detector circuit generates a 500 Hz audio signal when the level...