Reading is one thing, but handling the parts and building while reading along is a great way to reinforce and remember concepts. Jameco carries a wide selection of 555 timers & information about the 555 Timer Pinouts. This integrated circuit is simple and easy to use and has a huge variety of applications. Either as a timer in monostable mode - or as a square wave oscillator in astable mode, this timer will perform.
General-Purpose Single Bipolar Timer
The NE555 monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200mA
Low turn-off time
Maximum operating frequency greater than 500kHz
Timing from microseconds to hours
Operates in both astable and monostable environments