openQCM Wi2 exploits the potentiality and simplicity of the Teensy microcontoller, an arduino compatible development board equipped with a 32 bit ARM processor. The electronic circuit is based on a high precision quartz crystal oscillator which automatically tracks in the frequency changes. The new openQCM Wi2 electronics is now capable of measuring frequency up to 65 MHz, allowing you to use a wide range of quartz sensors with different sensitivities
Every detail has been designed to simplify the experimental activities of the researcher. Frequency is measured using the library FreqCount, which counts the number of pulses during a fixed time using the microprocessor hardware timer. This procedure works very well at high frequencies, because many cycles can be counted during gate interval. Typical gate time interval is set to 1 second. Teeny 4.0 is capable to measure frequency from 1 kHz up to 65 MHz.
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