Why use a 555 oscillator?
Because the principle of the 555 oscillator is simple but powerful, there are only 26 transistors inside. Even if the internal schematic diagram of the 555 oscillator is given to us, we can analyze its working principle through analysis. Not only that, but also Learn the knowledge of analog electricity and digital electricity.
For example, the trigger inside 555 is a category of digital circuits, and to understand this trigger, we must learn the knowledge in "Digital Electronic Technology". If we understand the trigger, we can basically get started with digital electronics.
Not only that, the 555 oscillator is more about the knowledge of modulo electricity, so in the 555 oscillator, we can also learn a lot of basics about it.
Due to the advancement of science and technology, people nowadays tend to be overly ambitious to start learning from STM32 and RTOS. Even if they can use library functions to operate the single-chip microcomputer, they don’t know anything about the bottom layer of it, or even do not know what triggers are.Such learning is not rigorous.
To sum up, we believe that the 555 oscillator should not be abandoned because of the current technological progress. Quietly on the contrary, if we really want to have a deeper development in a certain industry, we should study the most basic knowledge and be down-to-earth.
Now I will build an LED flash circuit with a 555 oscillator, hoping to inspire you guys' interest in learning the underlying electronic circuit. Check this part in the instruction.