Unlocking the 555 Timer: Creative Circuits and Projects for Engineers
The 555 timer is a versatile and widely used device in embedded system design, commonly employed in various electrical and electronics projects to generate precise clock pulses. Despite its popularity, many people remain unaware of its internal circuitry. In this article, we’ll delve into the inner workings of the 555 timer circuit, empowering you to build innovative projects and experiment with its capabilities.
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555 Timer Circuits
The 555 timer integrated circuits are used to generate an accurate square wave commonly used in many electronics circuits. The 555 timer circuit has designed with 20 transistors, 16 resistors, 2 diodes and a flip-flap. It can be operated in the range of 4.5v to 15v DC supply. The 555 timer IC has basically three functional parts such as;
Comparator
It is used to compare two input voltage levels which is inverting (-) one and non-inverting (+) terminals. If the voltage is high at the non-inverting terminal, then the output is high. The input resistance of ideal comparator is infinite.Voltage divider
As the input resistance is infinite in the comparator, so the…