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Nite Rider Lights(4027 )

2014-12-01 13:42  
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This article briefly describes the Nite Rider Lights (4027). This principle is easy to understand, but also very practical. Depth understanding of circuit elements, you can better grasp this principle. In this circuit, you can learn about and buy these components: 4027.

As a keen cyclist I am always looking for ways to be seen at night. I wanted something that was a novelty and would catch the motorists eye. So looking around at my fellow cyclists rear lights, I came up with the idea of ‘NITE-RIDER’.NINEextra brightLED’s running from left to right and right to left continuously. It could be constructed with redLEDs for use on the rear of the bike or whiteLED’s for an extra eye catcher on the front of the bike. All IC’s areCMOSdevices so that a 9V PP3 battery can be used, and the current drawn is very low so that it will last as long as possible.

Figure:1 Circuit diagram

Figure 1 Circuit diagram


1 555 timer IC4.
1 4027 flip flop IC1.
2 4017 Decade Counter IC2 and IC3.
3 4071 OR gate IC5, IC6 and IC7.
1 470 Ohm resistor 1/4 watt R3.
2 10K resistors 1/4 watt R1 and R2.
1 6.8UF Capasitor 16V C1.
9 Super brghtLED’s 1 to 9.
1 9V PP3 Battery.
1 single pole switch SW1.
1 Box.

How This Circuit Works

IC4, C1, R1 and R2 are used for the clock pulse which is fed to both the counters IC2 and IC3 Pin 14. IC1 is a Flip Flop and is used as a switch to enable ether IC2 or IC3 at pin 13. IC7a detects when ether IC2 or IC3 has reached Q9 of the counter pin 11. IC5, IC6 and IC7a protects the outputs of the counters IC2 and IC3 using OR gates which is then fed to the Anodes of theLED’s 1 to 9.



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