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this weekend I have started to build
a lamp controller board for my pinball machine
this board will control 16 lamps
in a 4x4 lamp matrix
right now I have already soldered a 2x2 matrix
I still need to build the other hal of the board
so that it becomes a 4x4 controller board
these are the lamps it is controlling right now
and here you can notice that there is a problem
the lamps shoul flash in sequence like this:
R, T,
this one and then this other one
but what is happenin is that
when R and T turn on, everything is alright
just R and T turn on
but when this one or this other one turn on, R and T turn on together
which shouldn't happen
I think it is happening perhaps because
there might be some induced current in the circuit
resulting in them turning on together
so, this is one thing I still need to fix
and I think this is happening because
there are both 1mA and 400mA in the same board
and perhaps the track where these currents pass may be too close to each other
so I need to take care to place them at a certain distance in the board
to avoid this induced current effect 28 00:01:34,941 --> 00:01:40,058 that I htink is causing the lamps to flash together
well... this board is connected to the Arduino, here
and the Arduino is connected to the PC
because in the future I'll use the DosBox emulator
in order to control the lamps through Arduino
by running the Pinball Fantasies game
just to let us see it in the top side of the playfield...
the intensity of the lamp when it is turned on
is oscilating a bit
and this, I think, is due to a problem in my power supply
that is suplying an unstable voltage
I need to get a better one
so that the light is kept in a constant intensity
while the lamps are on