Two suggestions. 1) go to radio shack and get an ardunio starter kit. May want to do this even if you do number two. This is the modern way to do this and you can show both the schematic for i/o and the program.
2) I can do what you are describing with four or so dpdt relays. One for each button, and one to reset the whole thing. The timer is a bit more tricky, maybe a 555, but I'd consider getting an delay relay as well. On Jan 8, 2015 6:09 PM, "Mark - Myakka Technologies" <m...@mailmt.com> wrote: > I'm working with some kids on a school project. They want help with a > simple circuit design. Bare with me as I explain this. My circuit > design skills are VERY basic. > > We will have 3 momentary switches (1 2 3). If they are pressed and > released in the order of 3 2 1, we need it to trip a relay and keep it > tripped for > about 4-5 seconds. Any other order and the relay stays closed. Also, > there should be a reset timer such as if 3 and 2 are tripped, but > nothing happens in x seconds system resets. > > This will be running off of 4 AAA or 4 AA batteries. This device will > be used for 5-10 minutes at a time. > > I'm trying to keep it basic as possible. These are 6 & 7 graders with > zero electrical knowledge. If the circuit get too complicated, their > eyes will just glaze over. > > I was thinking about something with capacitors. I know they store and > release energy and have some timing specs. > > > > -- > Thanks, > 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 > https://secure.acsevents.org/site/Donation2?df_id=1011305&PROXY_ID=1645865&PROXY_TYPE=22&FR_ID=57644 > > > --- > This email is free from viruses and malware because avast! Antivirus > protection is active. > http://www.avast.com > >
