I hope you worked all month on your 555 projects to meet up the deadline cause here is mine!
Name: Emergency S.O.S. Beacon
Lovely Codename: Bacon Beacon (There’s a story for this,it’s at the complete end of this page ;P )
What it is (in short):
The Bacon Beacon or BB is meant to be life saving device. When powered up by it’s 9V battery it emits a S.O.S. in morse code over the AM and (oddly enough) on the FM band. Since the range is to be kept short (1 mile) a search and rescue team could locate it using a simple radio and a directional antenna.
Here’s a demo for more “visual people” hehe:
1-You get lost.
2-You activate the beacon.
3-Some granny listening to AM band pick up your distress signal,call the authorithy who set up a Search and Rescue team. (yeah,this is how it will happen =P )
4-The S&R team track you down and save your day.
Now the more “in depth” stuff.
The device use 5 ne555 IC to complete it’s task.
The first one is named the Clock
It’s job is to turn on and off non-stop at a slow pace to switch between sending DOTS (.) and DASHES ( – )
The second and third one are on a higher frequency making the DOTS and the DASHES when turned on by the clock
The fourth one is bringing the output of our 2 last 555 together and generate a 1khz (or so) note we can hear.
The fifth one is the Xmitter,taking the sound from the fourth one and sending it over the airwaves (oh yeah, air waves).
Here’s a graph for more understanding:
Now that the working principle is explained,here is the wiring diagram:Bacon Beacon Wiring diagram (pdf) (462)
And now,here’s a 3D model of what the actual thing would look like:
Notice the “flashlight” ending.
It’s a bicolor visual beacon. Half of the leds are red to attrack attention when lost at night and the other half are Infrared for if you’re unlucky enough that a chopper is searching for you, well they use infrared cameras so you’d be like a star on the ground for them ( yep,a star) .
Now here is the breadboard version:
/!\ WARNING /!\ your eyes might be hurt by such un-neatness (lol) /!\ WARNING /!\
And finally,the story of “Why the heck is this named a Bacon Beacon!?!?!?”
So since Fightcube helped me A LOT to troubleshoot and wire things up correctly,we talked a lot over IM. Since it was like 2 in the morning,we were both pretty tired and making jokes (jokes are good!). So Fightcube said:
” Hhaha,your device is meant to attrack people,and it’s named the Beacon Stick…wouldn’t it attract more people if it was simply a bacon slice on a stick!?!!”
So from this conversation I decided to name it the Bacon Beacon =P
Huge thanks to Fightcube,Icemanfiveoh,BadWolf Corp,Google,Ebay, and seeed studio for making such nifty tools like the DSO nano V2 (which I extensively used to troubleshoot this thing all around).
May the Hack be with you!