Four-way flashing light string circuit (5)

It is a four-way flashing light string controller produced by the 5G169 light control special integrated circuit produced by Shanghai Component Factory No.
5. It can use the street light string El-El to cycle lighting, and can automatically change the brightness and cycle direction of the lights
.
    5Gl 60 is
made of PMOS Dingzhi, with
D IP 14 standard package
. The functions of each pin
are as follows: Pins ① to ③ are the external resistor-capacitor terminals JrJsl-rS3
of the brightness fractional oscillator . The ④~⑥ pins are the external resistor-capacitor terminals SA1-SA3 of the output speed oscillation tank. Pin ⑦ is the negative terminal of the power supply vss. The 8th pin is the AC JOHZ (10011z) step signal input terminal. Pins ⑨~@ are pulse signal output terminals. ~Ding. , used to drive the pin gate tube. The first pin is the cycle forward/reverse control terminal B, D. When this pin is empty or connected to the high voltage V∞, it is the forward cycle, that is, the light string is lit. The cycle mode is El-E2-F3-F4-El. …;This pin is connected to low level V. . When, it is a reverse cycle, that is, the light string lighting method is F:lI"4-F"S-E2--El¨. The @ pin is the positive terminal V of the power supply...     In the figure, the alternating current is rectified by VDl-V D4 and outputs full-duration pulsating direct current, which supplies power to the four-way lanterns El~Bu4. The other way passes R. , R:, vS and VD5 form a simple voltage stabilizing circuit. After filtering by C, it outputs about 6V DC power for integrated blocks A1 and A2. VDj plays an isolating role here, making R. The terminal can obtain 6V pulsating DC voltage, and the pulsating frequency is 2 times of the alternating current, which is iOOfiz. This 100Hz multiple is called R. The ③ pin of Feng A Al is used as a synchronization signal. The three inverters in the integrated circuit A2 (CD40f19) are connected to form an ultra-low frequency square wave oscillator with a brush period of iOs and r. When the ⑥ pin of A2 outputs high level, Al is positive and the reverse control terminal, that is, the ⑩ pin is also The high-level light cycle has a reverse timing sequence; when the 6th pin of A2 outputs low level, the 10th pin of Al is also low power, so the lantern cycle has a reverse timing sequence. Increasing or decreasing the R:. or ' value can change the length of the forward/reverse flipping period of the light string . Adjusting RP1 can change the flow rate of the colored light string, adjusting RI,2 can change the degree of the light's half-brightness gradual change (fading from dim to bright). Pin Gang calls it ffl MCR100-S type. Other component requirements and parameters are shown in the figure.