How to make a two-angle bidirectional LED and a normal LED light up alternately

ywccyx

How to make a two-angle bidirectional LED and a normal LED light up alternately [Copy link]

I want to use the two-corner bidirectional light-emitting tubes and ordinary light-emitting diodes to light up alternately, turning on green light, bidirectional blue light, and bidirectional red light in turn to simulate the signal of a traffic light. How can I achieve this using simple three-pole tubes, resistors, and LED lights? I would like to ask the experts for advice.

maychang

It can be realized by using triodes. However, the circuit using triodes, resistors, capacitors, etc. is complicated, so it is better to use gate circuits to realize sequential control.

qwqwqw2088

It is not a big problem to use what diode to simulate the signal of traffic lights, because the problem of simulation is to control the signal lights. The main problem is timing. It is a pure triode circuit. As the second poster said, it is complicated.

maychang

In fact, to control a number of light-emitting tubes to emit light according to a certain pattern, or in a broader sense, to control a number of devices to operate according to a certain pattern, it is most convenient to use a single-chip microcomputer. The price is not expensive, and it is easy to change the control scheme. You just need to write a very simple program.

maychang

"Simulating traffic light signals" Actual traffic lights at intersections, whether they are T-junctions, crossroads or more complex intersections, are all controlled by single-chip microcomputers.