Difference between revisions of "555 Timers"
Jump to navigation
Jump to search
(agree -- link, rather than quote. Leave a brief summary.) |
(agree -- link, rather than quote. Leave a brief summary.) |
||
| Line 1: | Line 1: | ||
| − | |||
| − | |||
| − | |||
The 8-pin 555 timer is one of the most popular [[Integrated Circuits]] (ICs) ever made. | The 8-pin 555 timer is one of the most popular [[Integrated Circuits]] (ICs) ever made. | ||
It is also one of the cheapest chips on the market, costing anywhere from $0.20 to $1.20 depending on the quantity and distributor. | It is also one of the cheapest chips on the market, costing anywhere from $0.20 to $1.20 depending on the quantity and distributor. | ||
| Line 8: | Line 5: | ||
The 14-pin 556 timer contains two 555 timers in a single package -- the two timers (A and B) share the same power supply pins. | The 14-pin 556 timer contains two 555 timers in a single package -- the two timers (A and B) share the same power supply pins. | ||
| − | Astable - producing a square wave | + | Most 555 timers are connected to a couple of resistors and capacitors in one of these 4 configurations: |
| − | Monostable - producing a single pulse when triggered | + | * Astable - producing a square wave |
| − | Bistable - a simple memory which can be set and reset | + | * Monostable - producing a single pulse when triggered |
| − | Buffer - an inverting buffer (Schmitt trigger) | + | * Bistable - a simple memory which can be set and reset |
| + | * Buffer - an inverting buffer (Schmitt trigger) | ||
| − | For more details on | + | For more details on variety of circuits that can be built using a 555 timer, see |
* http://www.555-timer-circuits.com/ | * http://www.555-timer-circuits.com/ | ||
* http://en.wikipedia.org/wiki/555_timer_IC | * http://en.wikipedia.org/wiki/555_timer_IC | ||
[[Category:Components]] | [[Category:Components]] | ||
Revision as of 17:46, 25 January 2010
The 8-pin 555 timer is one of the most popular Integrated Circuits (ICs) ever made. It is also one of the cheapest chips on the market, costing anywhere from $0.20 to $1.20 depending on the quantity and distributor.
The 555 timer will operate from a power supply of 4 V (some versions even less) to about 16 V. The 14-pin 556 timer contains two 555 timers in a single package -- the two timers (A and B) share the same power supply pins.
Most 555 timers are connected to a couple of resistors and capacitors in one of these 4 configurations:
- Astable - producing a square wave
- Monostable - producing a single pulse when triggered
- Bistable - a simple memory which can be set and reset
- Buffer - an inverting buffer (Schmitt trigger)
For more details on variety of circuits that can be built using a 555 timer, see
