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 > >
