The flash circuit power supplied by the AC power grid

Published:2011/5/22 8:33:00 Author:Crystal Liu | Keyword: The flash circuit power supplied by the AC power grid, BC172B | From:SeekIC

This circuit is used for alternate hige control of 100W incandescent lamp.The Dc voltage after rectifying Ac power supply voltage add to the circuit which is series connection one-way thyristor and load La(light) .Alternate hige frequency decided much harmonic oscillator's oscillation frequency.The picture circuit parameters adjustment 2.5kΩ potentiometer can make oscillation frequency range from 0.5Hz to 1Hz,occupies emptiescompared is 0.5,light time and blackout time is the same.If change 27kΩ passive resistance(range 5~50kΩ),the occupies emptiescompared will be changed,at this time 2.5kΩ potentiometer and 2.2kΩ resistance can cancel,Passive resistance can directly meet in the power which is 12V.



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