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Software

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Block diagram

The entire software is interrupt driven.
A timer inside the microcontroller generates a 500µs interrupt driven timebase.
The microcontroller generates a 100µs control pulse to the FET gate.
The flyback pulse is amplified and fed into the microcontroller comparator.
The pulse width is measured and will increase when a target is near the coil.
The time base is also used for the audio signal generation.

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Pickini V4


• Download the mikroC source file


• Hex for Pickini4.0 - initial comparator offset value = middle


• Hex for Pickini4.0 - same as 4.0 but 200 microseconds pulse width instead of 100 - for large coils


• Hex for Pickini4.1 - initial comparator offset value read from EEPROM = faster calibration


• Source file Pickini v4.2


• Hex for Pickini4.2 - sensitivity setting influences the comparator slicing value - manual control over slicing level

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PICKINI V4 home