555
Timer Circuit
Other names for this product: NE555, NE 555,
Courtesy/Thanks to: Philips Semiconductor
Description: The 555 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.
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| 555.pdf | Datasheet for the NE555 |
| 555-556.gif | Pin configuration for the 555 and 556 timers |
| Video: Using a DHT11 and | TdG0AJY4qLA |
Using the 555 timer as an |
The Need for an External Clock |