Electronics > Electronics

555 timer confusion

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osnap:
hi all,

I've been reading that you can make some cool simple circuits using 555 timers.  I looked and I saw that radioshack had one, so I think I'm going to buy some -- but I'm confused I know it doesn't need to be programmed, so, what would be needed to make a simple flashing LED circuit or something?

thanks, any help is greatly appreciated  ;D

555 timer chip guy:
Here are some cool projects one is an astable oscillator (if you attach an LED to the output it will flash) and then  if you get a 556 duel trimer or 2 555 timers you can make a  light seeking robot with the uther schematic

osnap:
Woa... uh.. could you just explain the schematic a bit?
I already don't understand 555 timers much as it is lol

gamefreak:
well those schematics helped me figure out my 555 timer, but they arent very.... pin friendly

http://www.uoguelph.ca/~antoon/gadgets/555/555.html, has the pin positions so if you base off both of the drawings then you can get a working LED flasher with adjustable speed

osnap:
how is the speed adjusted?

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