A very very slow Mouse-Emulation ( a Turtle) to prevent Displays from switching off (e.g. presentations).
This picture shows the final version in housing:
This picture shows the version2 with switch in housing:
This is intended to be used when doing a presentation and your Laptop is connected to the presenter (german: the "beamer")
e.g. during a team-meeting.
Often it happens that discussions start and there is no more movement of the mouse and no keys at the Laptop-Keyboard are pressed.
After 5 min or so the Laptop switches off the presenter.
The same applies to the situation when you are hosting e.g. a hangout-session with a presenter but mostly someone else presents, so there is no movement/keypress at your Laptop.
This small device prevents your Laptop from switching of the presenter.
Some guys (hey Lars :-) say you can reach the same behaviour with some "weird" settings somewhere deep in the configuration of your Operating System.
- that might be, but I dont find the settings...
- the seeting is depending on your OS, this little device is OS-independant
- doing a software-setting is pretty uncool and somehow missing the nerd factor ...
- Today I "pimped" the Turtle
- Now it moves around randomly, still every 10 secs
- After moving it presses the right mouse-button ==> context menu appears
- After that it presses "ESC" ==> The context menu disappears
- Then it sleeps for another 10 secs
- This gives much more the impression that "something" is going on
- The usecase is slightly different, you might "pretend" you are working ...
- A switch was introduced to switch between old "dont sleep presenter"-mode and "pretend-working"-mode , see Hardware
Once more using a "flying around" Teensy-LC. Once more a "shoot with cannons at sparrows"-project. No additional Hardware needed
The new Software is backwards-compatible to that Teensy-Only-Hardware, however if you want to make use of the new version,
you need to connect a switch between PIN0 and GND
Connector
/ ┌──────┬────┬─────┐
┌─────/ ──────o Gnd │ │ o 3V
│ │ │ │ │
└─────────────o 0 │ │ o Gnd
│ └────┘ │
o 1 o 5V
│ │
o 2 o
│ │
o 3 o
│ │
o . o
│ │
o . o
─ │ │
o . o
│ │
│ │
│ │
│ Teensy LC │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
└─────────────────┘
When there is no switch connected or the switch is open, it will read high (it's internally connected to a pull-up ressitor), when the switch is connected and closed to ground, then it will read a 0 and then call the new behaviour (CrazyTurtle)
When connected to USB ( Teensy is started) after a delay of 8 seconds a movement of the mouse left and
then back right to the original position is done.
This is just to show that Teensy now can act as a Mouse.
After that it only makes invisible 1-pixel-movements every 10 seconds.
(Invisible means : 1 pixel left and after 2 ms back one pixel right)
That's it for the normal hardware or the new hardware with the switch open.
When the switch is connected and closed to ground (this is checked every 10 seconds ) it will call the CrazyTurtle() which randomly moves the mouse around and right-clicks and then presses ESC. Then it will also wait 10 secs.
For the teensy to work properly with the turtle-software, the Arduino-IDE has to be set to:
- Teensy
- USB-Type : Keyboard + Mouse + Joystick
See 
To show that this small tool is a turtle it is housed in a "turtle". I used this one here from Wikimedia: ![Iimage of Turtle] (https://upload.wikimedia.org/wikipedia/commons/7/70/Kturtle_top_view.svg)
See the "making-of" and the final solution on my Blog (in German): http://jogiblog.kuenstner.de/?p=66