guidance please

C

classicalguitar

New Member

• Jul 26, 2009

• #1

Ok. I recently got into electronics (2 months ago) and ive been teaching myself. I have a grasp of most of the basics, but i was looking for some reading material, preferably on ICs and transistors. Also, ive just started working with a 555timer IC, and i was wondering how i could hook it up to a relay.

 

MikeMl

Well-Known Member

Most Helpful Member

• Jul 26, 2009

• #2

First, a few questions:

What is the relay coil voltage and resistance?
What voltage do you want to run the 555 on?
Do you want the relay pulled in when the 555 output (pin 3) is high or low?

 

S

schmitt trigger

Well-Known Member

Most Helpful Member

• Jul 27, 2009

• #3

google it, there are hundreds of schematics

 

C

classicalguitar

New Member

• Jul 28, 2009

• #4

im running the 555 on 5 volts
i have it set up already in astable mode connected to an led.

 

MikeMl

Well-Known Member

Most Helpful Member

• Jul 28, 2009

• #5

classicalguitar said:

im running the 555 on 5 volts

Click to expand...

You didn't answer the important questions:

What is the relay coil voltage and resistance?
Do you want the relay pulled in when the 555 output (pin 3) is high or low?