Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Thanks dougy83
Please forgive me if im trying your patience :-( but i dont have any experience at all with electronics, quite fascinating though :-)
I've tried your suggestion Dougy83. Disconnecting pin7 doesnt work. I removed the transistor and connected LED to pin3 then a transistor and...
Thanks again 4pyros and meowth08
I tried to build this circuit ( I am a beginner) on a breadboard. The led lit up but stayed on. Curiously, the wire to pin 2 disconnected without me noticing and the circuit appears to work as desired?? How strange! I'm assuming I have done something wrong :-)...
Thanks so much 4pyros but does this solution mean there is always a 9v connection? With my problem there is not always a current. I want the led to come on when there is a current but only for 3 to 4 seconds.
Hi everyone
I'm a complete novice with electronics and i'm in need of your help (obsequious bowing)
I need to build a simple low power 12v dc led circuit such that when power is first applied the diode lights up for 3 to 4 seconds then switches off. It only comes on again when the power is...
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