Flowing water lantern

The core device of the multi-channel lantern control circuit is the large-scale integrated circuit SE 9201. This integrated circuit has the advantages of novel designs, multiple functions,
low voltage, and low power consumption. Thyristor control can be used for holiday lights, advertising signs, facade lighting decoration control, etc. The multi-channel lantern control
circuit is as shown in the figure.
    The integrated circuit SE920i has 4 pattern selection terminals B1~B4. Through different electrical connections through the programmable controller, numerous changing flash
patterns can be formed. There are 8 output terminals oi~Q8, which can drive 8-way colored lights. Since Q1~Q and os~Q8 are symmetrical, they can also be simplified to 4-
way controlled colored lights. The power supply voltage used by the integrated circuit SE9201 is 3~8V, with a typical value of 5v. This circuit has few external components and only requires
an external resistor and a capacitor . Their values ​​determine the clock frequency of the oscillator. Usually the capacity of the capacitor is 0.1-0.22VF, and the resistor
is a 1Mn variable resistor. By changing its resistance, the speed of the flash can be changed.
  Integrated circuit SE 92c)l has 8 basic patterns: ① 4-point pursuit {② elastic expansion and contraction} ◎ vault right-hand rotation
; Bright interval flash. Through the programming combination of different levels of the pattern selection terminals Bl~B4,
the selection and control of 4 cycle functions including single cycle, double cycle, automatic conversion of 8 basic patterns, full cycle and double full cycle can be realized. When automatically
switching to full cycle, the number of flashes for each pattern; except for the full-bright interval flashes 4 times. All other tricks are 8 times.
The number of flashes for each pattern of double cycle and double full cycle is half of the number of automatic conversions.