555 Timer May 2026

An active low pin that initiates the timing cycle when the voltage drops below 1/3 VCCcap V sub cap C cap C end-sub

Ends the timing cycle when voltage exceeds 2/3 VCCcap V sub cap C cap C end-sub 555 timer

The 555 timer is one of the most iconic and versatile integrated circuits (ICs) ever produced. Since its introduction in 1971 by Signetics, it has become a staple for both hobbyists and professional engineers due to its low cost, ease of use, and incredible stability. Often referred to as "The IC Time Machine," the 555 timer is capable of generating accurate time delays and oscillations for a vast range of electronic projects. The Origins and Internal Design An active low pin that initiates the timing

Connected to an internal transistor that discharges the timing capacitor. Pin 8 ( VCCcap V sub cap C cap C end-sub The Origins and Internal Design Connected to an