A 2000 word LED cycle light circuit report

Using a microcontroller is very simple. If you use a digital chip, such as the 74 series, it is also a lot of trouble.

You asked not to have a single-chip microcomputer later, and you didn't make it clear how many bits your design is! There is no solution to this! Let's be clear!

Using a microcontroller should be the easiest.

Yes, if the supply voltage is high enough, Q2 will burn out;

Also in order to delay the time, that is, to extend the discharge time, a resistor should be connected in series at the emitter of Q1;

Of course, it is also possible to connect a resistor in series between the base of Q2 and the collector of Q1;

So that the circuit is safe;

Satisfied.

In this circuit, R1 limits the base current of Q1 and uses IC= *IB to limit the base current of Q2. This circuit is simple, but there is a disadvantage, that is, the brightness of the LED in the process of delay is continuously reduced until the last is not bright, if you want to have a short period of time when the brightness does not decrease, you can appropriately increase C1, decrease R1, and at the same time add an appropriate resistance resistance at the base of Q2 to limit the base current of Q2.

Multiple LEDs in series? This depends on your power supply voltage, remember, an LED needs about a voltage drop, different product values are different, take the middle value; The use of LED parallel connection is also one of the feasible methods;

Absolutely.

You'll have to show me the circuit first, so I can figure out how to string one more.

10 LED lights in turn cycle lit up marquee circuit:

NOR RC oscillators, binary counters, all-digital integrated circuits, circuit diagrams are flying all over the ......

The multisim picture can't be pasted here.,Give you a screenshot jpg.,The signal source makes one yourself.,You can use 555.。 If not, email me.

What is the tone of voice? Who owes you a circuit diagram?

Go to the electronics enthusiast forum, I'm afraid you won't be able to achieve it here!

I only have light control, artificial stepless dimming.

Please click Enter a description.

The PWM core used in the circuit diagram circulating on the Internet is a fully intelligent program written into the computer, and even I don't know it, so I have to adjust the voltage on the LED with a potentiometer. (After drawing this circuit diagram, my intestines are repentant, it may be that only a small section can be effectively dimmed, and other places are not lit at all) In fact, I don't know a lot, half a bucket of water.

There are several problems with this circuit diagram, and the LED cannot achieve a three-color cycle, but can only achieve a synchronous flashing function. Q1 and Q3 should be a photocontrol circuit, and the R9 photoresistor uses the wrong symbol. Q3 is not connected either.

This is my own heart-shaped LED, it's really not difficult, if you want to send a girl, it makes more sense to do it independently, don't spray me! Let's be honest!