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Led lamps controller 1

2016-08-09 07:44  
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Led lamps controller 1
The LED festival character display lights controller can display four sentences and four words composing of many LEDs(such as celebrating May Day and long live our motherland ), and they display in time sequence to add festive atmosphere to festive night. Working principle: The LED festival lights controller circuit is composed of power supply circuit, pulse generator, control circuit and LED display circuit. It's shown as the chart of 1-165. Power supply circuit consists of step-down capacitor Cl, discharge resistors Rl, rectifier diodes VDl, VD2, Zener diode VS and filter capacitor C2. The pulse generator is composed of integrated circuit ICl, resistors R2, R3 and capacitors C3, C4. Control circuit consists of decimal counting / pulse divider integrated circuit IC2, diodes VD3, resistors R4-R8, capacitor C5 and thyristor VTl-VW.