basically I have a 22 nF cap. and a 10v 47uF cap. and was wondering if I can make them work to make a LED flash. I have a ton of resistors, just only two kinds of cap. no idea how I would calculate this, any help would be appreciated, even a reference were I can read more about this and how to calculate this would be even better.
after I get this rolling, next I want to make it random, can you do that with series of 555 timers or would I need something else?
Have you looked at any of the charts on the 555 timer data sheet for pulses & astable & monostable operations?
The web has MUCH about the 555!
Some INFO on the ArduinoInfo WIKI here - http://arduinoinfo.info See:
http://arduino-info.wikispaces.com/Popular-ICs
I like to think of the 555 as a flip-flop with 2 comparators controlling when it is set and reset. Like this:
The 555 was designed in 1971 by Hans R. Camenzind, who died a short time ago. None of us will ever design something as well known and widely used.
CrossRoads:
Have you looked at any of the charts on the 555 timer data sheet for pulses & astable & monostable operations?
I have not, would that be provided by the manufacturer? I honestly don't even know where to start.
ah, thank you! I will start reading now.
I also found this: http://www-old.me.gatech.edu/mechatronics_lab/LabMaterials/EExercise2.pdf
but it was a bit over my head.
terryking228:
The web has MUCH about the 555!Some INFO on the ArduinoInfo WIKI here - http://arduinoinfo.info See:
http://arduino-info.wikispaces.com/Popular-ICsI like to think of the 555 as a flip-flop with 2 comparators controlling when it is set and reset. Like this:
The 555 was designed in 1971 by Hans R. Camenzind, who died a short time ago. None of us will ever design something as well known and widely used.
indeed. this is neat, however I still have no idea how to make it work in a practical sense. No idea what the capacitors and resistors are doing other than a guess of supplying the eventually powered LED with correct values. but what happens inside the 555 is beyond me!
terryking228:
The 555 was designed in 1971 by Hans R. Camenzind, who died a short time ago. None of us will ever design something as well known and widely used.
Truly a sad loss...
however... saying "none of us" would imply you have a time machine....
cjdelphi:
terryking228:
The 555 was designed in 1971 by Hans R. Camenzind, who died a short time ago. None of us will ever design something as well known and widely used.Truly a sad loss...
however... saying "none of us" would imply you have a time machine....
Maybe terryking228 was being a bit hyperbolic; but remember Mr. Camenzind was not only around during the first generation of mass produced integrated circuits, he designed some of them that are still commonly being used today! Fundamental shifts of that magnitude in the electronics design are not just uncommon, they are rare, as most technological progress is incremental (despite often being impressively so). So IMHO while it is certainly possible a forum user could do something as significant in the future; regardless of personal ability (which is important too) it's very difficult unless you happen to be at the right place at the right time, and the right time doesn't occur very often (maybe two or three times during an average lifespan).
however... saying "none of us" would imply you have a time machine....
Maybe terryking228 was being a bit hyperbolic;
Possibly .. 8)
Actually I hope to be wrong about that, and I believe that Arduino is connecting to some of the best minds in the world, and not just those who are as Nerdy as (I/we) were as a young person. I'll be doing a MakerFaire Arduino booth in a few days, along with one of my Engineer sons and a 16 year old Grandson who has built quite a cool robot.
If anyone is teaching/showing Arduino to a young person who is short on money, please email me and I'll be happy to donate a Kit or Two like these: http://goo.gl/xaFjn
555 Online Calculator here: http://freespace.virgin.net/matt.waite/resource/handy/pinouts/555/
And TI has this one: http://www.ti.com/tool/tlc555calc
Regards, Terry King
...In The Woods in Vermont, USA
The One who Dies with the Most Parts LOSES...
terryking228:
The web has MUCH about the 555!Some INFO on the ArduinoInfo WIKI here - http://arduinoinfo.info See:
http://arduino-info.wikispaces.com/Popular-ICsI like to think of the 555 as a flip-flop with 2 comparators controlling when it is set and reset. Like this:
The 555 was designed in 1971 by Hans R. Camenzind, who died a short time ago. None of us will ever design something as well known and widely used.
I agree with that statement Terry. The classic 555 chip will most likely be the IC chip with longest continuous production run ever, if it does not already hold that distinction.
Lefty