LED Tail Ring Light Circuit for your Car

以下文章描述了一个精美的LED测序/发散的环形电路，该电路可用作汽车中的尾刹车灯。这个博客的狂热读者鲍比先生要求这个想法。让我们了解更多。

技术规格：

Hello,

我只是通过您的精彩文章读到有关构建LED追逐尾灯的精彩文章：https：//www.addme-blog.com/how-to-make-car-car-red-chasing-tail-tail-light/

Could this circuit be adapted to create a round tail light that lights rings in sequence from the center out as the brake is pressed, one ring at a time until all the LEDs are lit and then flash all the LEDs twice and keep all LEDs lit solid after? If not, could you design a circuit that would?

我would be willing to pay for your time.
Thank you,

鲍比

The Design

The circuit diagram shown below has been designed as per the above request, let's understand its functioning with the following points:

IC1是一个“串行移动电阻”，形成了整个电路的心脏，该IC的主要功能是照亮连接到PIN出口的LED＃3-4-5-6-5-6-10-11-12-13序列，保持序列的锁定和照明。这是对IC的引脚＃8上应用的每个时钟脉冲的响应。

The LEDs which are triggered by the pin#3-4-5-6 and 10 are arranged as rings such that it illuminates from inner most ring first toward the outermost ring, producing an interesting and visually rich effect.

这并不是全部，在上述效果之后，整个照明的阵列闪光灯三次，然后关闭。

每次施加制动器时，上述“显示”重复。

应用制动器时，电池电压与电路启动以下操作连接：

C1 resets IC1 such that the sequence begins from pin#3 and not from any other in between pin out (this output illuminates the inner most ring).

我C2 is an oscillator IC which generates the required clocks for the IC1 from its pin#3.

我n response to the above clocks, the sequence proceeds creating the desired diverging illumination effects, until it reaches pin#10.

LED通过T1接收所需的正供应，​​该供应由于IC1的引脚＃13处的逻辑较低而触发。

When the sequence reaches pin#10, T6 conducts which also switches ON T7.

The emitter of T6 is connected to pin#3 of IC2 which is already generating the clocks for the required of IC1.

The alternating low pulse from this pin out switches T6/T7 in a blinking mode.

T7, in response to the above blinking, sends correspondingly pulsating positive pulses to base of T1.

反过来，这迫使T1按照上述影响闪烁LED。

The illuminated ring arrays start flashing until the sequence is forwarded to pin#13.

The moment pin#13 becomes high, T1 switches OF and also the "high" reaches pin#11 of IC2.

我C2 locks and stops the clocks at pin#3.

The whole operation freezes.

上面的系统只有在释放并重新释放刹车后就会断裂并重复。

需要以以下方式连接到T1和T2/T3/T4/T5的收集器的LED。该布置应以圆形方式设计，以形成相应的环。

零件清单

• R1 = 2M2
• R2 = TO BE EXPERIMENTED
• R3 = 1m
• R4 --- R12 = 2K2
• T1 = 8550或2N2907
• T2 ---- T6 = BC547
• T7 = BC557
• D1 =1N4148
• C1,C2 = 0.1uF
• IC1 = 74LS164
• 我C2 = 4060
• 我C3 = 7812

ALL LEDS = RED 5MM, ASSOCIATED RESISTORS ARE ALL 150 OHMS, 1/4 WATT