Maybe easier than I thought.. http://www.amazon.com/SRD-5VDC-SL-C-Electronical-Delay-Relay-Module/dp/B00CWA4TZ8 and a lot of others.... On Jan 9, 2015 11:05 AM, "Forrest Christian (List Account)" < li...@packetflux.com> wrote:
> Last one I bought was from Amazon. The challenge will likely be finding > one at the voltages you're taking about. > > Without the time delay relay, you can do everything but the timed reset. > On Jan 9, 2015 11:00 AM, "Mark - Myakka Technologies" <m...@mailmt.com> > wrote: > >> Forrest, >> >> Time delayed relay, that may be the ticket. Never worked with them >> before, but that would be the easiest to explain to 6th & 7th grader >> with ZERO electrical experience. Going to start some googleing >> >> -- >> Best regards, >> Mark mailto:m...@mailmt.com >> >> Myakka Technologies, Inc. >> www.MyakkaTech.com >> >> Proud Sponsor of the Myakka City Relay For Life >> http://www.RelayForLife.org/MyakkaCityFL >> >> Please Donate at >> http://main.acsevents.org/site/TR/RelayForLife/RFLFY12FL?team_id=1030009&pg=team&fr_id=37555 >> ------ >> >> Friday, January 9, 2015, 12:32:08 PM, you wrote: >> >> FCLA> Two suggestions. >> >> FCLA> 1) go to radio shack and get an ardunio starter kit.ￜ May >> FCLA> want to do this even if you do number two.ￜ This is the modern >> FCLA> way to do this and you can show both the schematic for i/o and >> FCLA> the program. >> >> FCLA> 2) I can do what you are describing withￜ four or so dpdt >> FCLA> relays.ￜￜ One for each button, and one to reset the whole >> FCLA> thing.ￜ The timer is a bit more tricky, maybe a 555, but I'd >> FCLA> consider getting an delay relay as well. >> >> FCLA> On Jan 8, 2015 6:09 PM, "Mark - Myakka Technologies" < >> m...@mailmt.com> wrote: >> FCLA> I'm working with some kids on a school project.ￜ They want help >> with a >> FCLA> simple circuit design.ￜ Bare with me as I explain this.ￜ My >> circuit >> FCLA> design skills are VERY basic. >> >> FCLA> We will have 3 momentary switches (1 2 3).ￜ If they are pressed >> and >> FCLA> released in the order of 3 2 1, we need it to trip a >> FCLA> relay and keep it tripped for >> FCLA> about 4-5 seconds.ￜ Any other order and the relay stays >> closed.ￜ Also, >> FCLA> there should be a reset timer such as if 3 and 2 are tripped, but >> FCLA> nothing happens in x seconds system resets. >> >> FCLA> This will be running off of 4 AAA or 4 AA batteries.ￜ This device >> will >> FCLA> ￜbe used for 5-10 minutes at a time. >> >> FCLA> I'm trying to keep it basic as possible.ￜ These are 6 7 graders >> with >> FCLA> zero electrical knowledge.ￜ If the circuit get too complicated, >> their >> FCLA> eyes will just glaze over. >> >> FCLA> I was thinking about something with capacitors.ￜ I know they >> store and >> FCLA> release energy and have some timing specs. >> >> >> >> FCLA> -- >> FCLA> Thanks, >> FCLA> ￜMarkￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ mailto: >> m...@mailmt.com >> >> FCLA> Myakka Technologies, Inc. >> FCLA> www.MyakkaTech.com >> >> FCLA> Proud Sponsor of the Myakka City Relay For Life >> FCLA> http://www.RelayForLife.org/MyakkaCityFL >> >> FCLA> Please Donate at >> FCLA> https://secure.acsevents.org/site/Donation2?df_id=1011305 >> FCLA> PROXY_ID=1645865 PROXY_TYPE=22 FR_ID=57644 >> >> >> FCLA> --- >> FCLA> This email is free from viruses and malware because >> FCLA> avast! Antivirus protection is active. >> FCLA> http://www.avast.com >> >> >> >> >> >> >> >> --- >> This email is free from viruses and malware because avast! Antivirus >> protection is active. >> http://www.avast.com >> >>
