Displaying messages with only 7 (or 4) LEDs on a stick...

[Toley00]

Hello Flotulopex,
I did something like that for students school project. I did it very simple with a posicle stick and a little block of wood. I use 7 leds, a PIC16F627A and a CR2032 battery. The trick is to generate an interrupt at the beginning of the movement, for doing it I simply use a bolt soldered on a steel wire. The longuest part is to write character table. I have tu use PORTA cause I needed PORTB for the interrupt pin RB0 and the programming pins also. The bad thing is that RA5 can't be use as an output so I needed to use 5x7 matrix on PORTA without RA5. I splitted each character in 5 parts (lower case, higher case, numbers and french caracters also) and I did a routine that send them as needed. I'm not home at the moment and I don't have any schematic picture or code but I can post some parts of the code if you want.

[flotulopex]

Thanks for all your infos.

I get a better view of what I'll have to do now.

Toley00, thank you for your offer about your code but... for now, I would like to make my own one (I don't like to spoil my fun) If I'm stuck, I'll ask you again.

I was just really missing this info about finding the correct "display start point" for the beginning of the movement...

[Ioannis]

If you don't want to make your own sensor, you might use one of the vibration sensor used in the alarm systems to sense glass breakage. They are adjustable so you can set the sensitivity.

Ioannis

[Kamikaze47]

The trick is to generate an interrupt at the beginning of the movement, for doing it I simply use a bolt soldered on a steel wire.

Toley00: Could you explain how you did this? I'm having trouble visualizing how a bolt soldered on a wire helps. Cheers.