LM555 and LM556 Timer Circuits时基电路集锦.docVIP

LM555 and LM556 Timer Circuits This page presents general information and tips for using the LM555 timer and devices with other letter prefixes. There will be minor internal circuitry differences between 555 timer ICs from the various manufacturers but they all should be useable for the circuits on this page. If you would like to use any of these ideas, take the time to do some testing before using the LM555 timer in an actual circuit. All of the solutions on this page can also be applied to the LM556 - Dual timer. Some of the circuits on this page were developed just to see if they would work and have no intended use. The menu below links to various sections of this page that relate to the items in the index. New additions appear at the bottom of the list. - Page Sections - RESET And CONTROL Input Terminal Notes LM555 - Monostable Oscillator Calculator LM555 - Astable Oscillator Calculator + Capacitor Calculator Basic Circuits For The LM555 Timer Triggering And Timing Helpers For Monostable Timers Controlling Circuits For LM555 Timers Advanced Circuits For The LM555 Timer LM556 Timers with Complimentary or Push-Pull Outputs Interlocked Monostable Timers Power-Up Reset For Monostable Timers Cross Canceling For Monostable Timers RS - Flip-Flop Made With A LM556 Timer Using The LM555 As A Voltage Comparator Or Schmitt Trigger 50% Output Duty Cycle (Variable) Bipolar LED Driver Electronic Time Constant Control Voltage Controlled Pulse Width Oscillator Sweeping Output Siren D - Flip-Flop Made With A LM556 Timer Time Delay Circuits Variable Period Oscillator (CD4017) Missing Pulse Detectors / Negative Recovery Circuits 50% Output Duty Cycle (Fixed) Using Logic Devices Three Stage Cycling Timer Circuit (Traffic Light Circuit) RESET Terminal - Currents And Voltages 555 Timer Current Draws Delayed Re-Triggering 555 Timer Output Section Various Power ON Delay Circuits Average 51.5 % Output Duty Cycle Using A 555 Timer Driving Loads Of Greater Than 15 Volts Or 200 Mil