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
