grizedale
Advanced Member level 3
Hello,
We have four flashing LED lamps , each mounted at different parts of a lorry.
Each Lamp has a PIC12F683 microcontroller in it.
The four microcontrollers all have their GP4 pins connected together by a wire.
….The microcontrollers use this wire to send and receive pulses to each other.
These pulses correspond to the times at which they are flashing their LEDs on……and the purpose of this is so they can all flash there LEDs in synchrony with each other.
My question is:
Is it best to have an Active high pulse, or an active low pulse?
……here are representative diagrams of active high and of active low signalling between the PICs….
Active High:
https://i50.tinypic.com/214crut.jpg
Active Low
https://i48.tinypic.com/10za2v6.jpg
..So which is best?
We have four flashing LED lamps , each mounted at different parts of a lorry.
Each Lamp has a PIC12F683 microcontroller in it.
The four microcontrollers all have their GP4 pins connected together by a wire.
….The microcontrollers use this wire to send and receive pulses to each other.
These pulses correspond to the times at which they are flashing their LEDs on……and the purpose of this is so they can all flash there LEDs in synchrony with each other.
My question is:
Is it best to have an Active high pulse, or an active low pulse?
……here are representative diagrams of active high and of active low signalling between the PICs….
Active High:
https://i50.tinypic.com/214crut.jpg
Active Low
https://i48.tinypic.com/10za2v6.jpg
..So which is best?
