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Common ballroom strobe light circuit principle
Circuit principle: C5, C6, C7, C8 are 4 storage capacitors. The mains supply charges C7 and C8 for half a week, and C5 and C6 for the negative half cycle. Therefore, both ends of C5 and C6 (ie, both ends of the flash tube) are charged with nearly 2 times the peak voltage of the mains (about 600V). Use flash for flash tube L flash. When the utility power is charging for the energy storage, C1 and C2 are also charged. When the voltage on the C2 reaches the conduction voltage of the bidirectional trigger diode DB2, the trigger voltage of the thyristor PHS1 triggers the conduction voltage. After C1 is discharged through PHS1 and boosted by B1, the flash tube discharge flash is triggered. The thyristor is turned off when the mains voltage crosses zero, and a stroboscopic action is completed. The subsequent process is the same as described above. In this way, the strobe light flashes continuously for a certain period of time. Adjusting W1 can change the charging speed of C2, thus changing the conduction frequency of the trigger diode DB3 (the DB3 trigger voltage is about 20V), and thus controlling the frequency of the strobe light.