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.
Collin; ya, that's a good question that I need to ask the actual instructor that will be working with the students. The way I have it now, with a single 555IC would, I believe act in the second way you descibed. But, after staring at your question for a while, I'm inclined to believe the...
Mehtab; I need the switch to be held for 15 seconds. Students will be using this on a fire extinguisher trainer. I need the instructor to be able to retrieve the unit after it's been used by a student some time later and be able to tell if they discharged the extinguisher for the full time...
I'd like to build a small 5 or 9 volt switch timer that will light an LED when a switch is closed for 15 seconds and keep it lit until reset. Does anyone have a schematic? I've seen several similar designs that might be adaptable but I'd also like to make it as small as possible and I'm...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
