Why do you need to connect all the negative terminals of each device? Can you give more details about your devices?
SBrick outputs aren't «positive» nor «negative» - they are «floating». There is a chance you can do what you want but you have to assure that you never reverse the polarity on all ports. So there's a risk one day you do revert and brake something.
If your reason is all your devices being externally powered and having a common ground/earth then you should consider galvanic isolating your SBrick ports with optocouplers.
Le montage que je te Souhaite Réaliser est circuit non lumineux verser camion. Sur un Fait Les veilleuses, les feux de croisement PUIS les feux de routes. Dois-je faire Alors juin masse versez option each?
Hello Maxime,
Athough I don't quite understand your question, I'll try and answer what I think you might ask:
The SBrick's ports MUST NOT be connected in parallel to each other, not even across different SBricks. Althogh the different channels are driven with the same phase, and in theory one can make sure two ports are receiving the same signal from software, there is absolutely no guarantee in practice that the ports will switch on and off the same time. Because of this there's always a danger of ports getting parallelled with their polarities reversed, causing a short circuit. One could say that since the SBrick is short circuit protected on the C1 and C2 signal lines (the two "middle wires" of the PF cable), there is no real danger there.
The reality is that a short circuit always strains the electronics, because the IC cores will heat up very quickly. The expanding semiconductor, and the magnetic forces of the large currents together can excert considerable mechanical forces on the various components. Do this a thousand times a second, and you might end up with (microscopic) deformities in the materials making up the SBrick. The high temperatures in the IC cores slowly lead to diffusion of the doping in the semiconductor. This will change the operational parameters of the components until they just stop working altogether.
Since the output ports of SBrick are galvanically connected e.g. they are not isolated with transformers, they CANNOT be connected in series to increase the output voltage. Connecting the ports of SBricks using the same power supply, or using different supplies with a common ground WILL cause a short circuit FOR SURE.
Connecting two SBrick ports on different bricks using different supplies that are completely separated is possible but it's not really practical in my opinion. (You could swith one brick to be constantly on, and use the PWM of the other one to control the motors, but that's a really dirty hack. :D)
If I missed your question, please try to draw a schematic of some kind.
[blockquote]Maxime Boche said:
Bonjour, je voudrais savoir si toutes les masses des ports peuvent être connectées entre elles et envoyer des intensités différentes afin de réaliser un faisceau électrique de camion.
[/blockquote]
Can you repeate your question in english? I tried to translate it with google translate, but it failed. :(
