The internal working voltage of this device can reach 90~100V, which exceeds the international safety voltage standard of 36V. Therefore, when it is powered on and working, do not touch the internal electronic components, otherwise electric shock accidents will occur. The insulation skin of external electronic components such as coils is thin, so it is necessary to avoid damage and leakage caused by rubbing. The switch is also a weak link. If it is exposed, the risk will be higher in the version without a casing, so pay attention to handling. Self-assembled circuit boards inevitably have errors or faults. If the booster circuit is already working normally, the voltage of the energy storage capacitor (1000UF/100V) may have been charged to a higher value, causing electric shock hazards. Therefore, before troubleshooting and processing, first use a multimeter to measure the voltage at the two legs of the energy storage capacitor, or directly use a plastic-skinned wire (both ends are stripped to expose the copper wire), pinch the plastic skin and use both ends of the copper wire Touch the two feet of the capacitor to discharge. After the charge is completely released, the capacitor voltage will drop to OV, and then it can be safely operated with bare hands.
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