jake Posted January 25, 2004 Report Share Posted January 25, 2004 Need to make a switch as follows:=When power applied relay closes for 1 sec. and re-opens even when power stays constant.=When power removed same relay closes for 1 sec. and re-opens=cicuit to be powered seperate from power used to trip relay. Voltage to power board 110, signal voltage 5 volts, relay to operate flashlite bulb (3.0 volts)I am new to building circuits - automotive mechanis my specialty but I want to learn !!!!! Quote Link to comment Share on other sites More sharing options...
MP Posted January 25, 2004 Report Share Posted January 25, 2004 The attached pdf file might get you started. This is 555 timers. There is a similar relay example in the doc. You will have to calculate your time constant with the formula provided.MPTimer_Circuits_-_555.pdf Quote Link to comment Share on other sites More sharing options...
jake Posted January 25, 2004 Author Report Share Posted January 25, 2004 Thanks MP - I think that will work! Quote Link to comment Share on other sites More sharing options...
MP Posted January 25, 2004 Report Share Posted January 25, 2004 Here is also a good link to a 555 tutorial if you want to learn more about the capability of this chip.Have fun!http://www.meridianelectronics.ca/gadgets/555/555.htmlMP Quote Link to comment Share on other sites More sharing options...
jake Posted January 26, 2004 Author Report Share Posted January 26, 2004 Super! This is exactly what i've been looking for - thank-you ! Quote Link to comment Share on other sites More sharing options...
login
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.