Red & Blues Strobe Flash Light with NE555, CD4017 Chips - DIY Kit

There is an integrated circuit that, despite being produced for half a century, has not become outdated and its range of applications is so wide that many books have been written about it.

Meet the NE555 timer!

This is a self-assembly and soldering learning kit.
Easy to assemble.
Assembly time 1 hour.

Functional Description:

This kit simulates a light circuit using a NE555 timer and a CD4017 counter. The blue and red LEDs flash alternately depending on the pulse generated by the timer. The NE555 multivibrator will have a specific frequency oscillation signal sent to the decimal counter/pulse splitter CD4017 for counting. When pulses 1,3,5 occur, the high output of Q0, Q2, Q4 will trigger the blue LEDs to flash 3 times, while the high output of Q5, Q7, Q9 will trigger the red LEDs 3 times. The blue LEDs flash again when pulses 11,13,15 occur, and so on. The blue and red LEDs flash alternately continuously creating an alarm signal pattern known as Reds & Blues. Changing the setting of the RP1 potentiometer changes the oscillation period, thus changing the switching speed of the LEDs.

The system is powered by DC9-12V.

When installing, pay attention to the polarity of the LEDs. R2 and R3 control the brightness of the light, it can be changed accordingly, the range is 10-100 ohms.

Instruction:

The systems have an assembly diagram printed on the board. You need to pay attention to polarity in the case of elements such as capacitors, diodes, transistors. In the case of LEDs, the longer leg is plus +, most elements have their parameters described on the housing. Resistors may have stripe markings, their resistance and tolerance can be read using calculators available on the Internet or measured with a multimeter. The assembly order is usually arbitrary, depending on the layout, we assemble the smallest elements first.