Minus-Maxus

High resolution Minus-Maxus thermometer control application

Minus-Maxus is an application for measuring the temperature from a temperature probe without battery, low consumption (<0.3mA), connected and powered directly by the headphone socket of the smartphone, i.e. the audio jack port 3.5 mm with 4 contacts (stereo, microphone and ground signals). On recent smartphones, if the jack connector is missing, Minus-Maxus thermometers can be connected via a 3.5 mm jack adapter to a USB-C connector. They also plug into and operate on the 4-contact audio jack and, with an adapter, on the 3-contact stereo output and 2-contact mono microphone input or even USB-C or USB_A on Windows PCs. For the latter, there is an Ad hoc application. Despite the adapter, not all Android smartphones are necessarily compatible in terms of microphone signal processing. Eligible phones are being identified. The application manages the THR125 High Resolution Thermometers (-25°C to +125°C) with a resolution of up to 0.01°C and the TPE Extended Range (-30°C to +200°C) with a resolution of 0.1°C. The app allows you to choose between NTC (Negative Temperature Coefficient) and PTC (Positive Temperature Coefficient) thermistors such as platinum resistors. You can view the temperature in the form of monitoring. It is backwards compatible with older versions of Android, up to version 5. It will transform old smartphones, such as the Galaxy Note 4 released in October 2014, into precision measuring instruments.