V1 vs V2
V1 (green PCB) and V2 (black PCB with "1.2") are equally capable and run the same program code.
The di
ff
erence is that the V1 PCB is slightly less convenient to work with, and is also why it's being sold for a
signi
fi
cant discount.
Here are the di
ff
erences:
Customizing the Microcontroller Code
This relay module uses an ATtiny13 or ATtiny85 microcontroller. Its code is available on the github project
page <https://github.com/mstratman/relay-bypass>.
You can then use an AVR programmer to experiment and update the program on it. I recommend the
SparkFun Pocket Programmer, but there are plenty of other options.
Even if you're not extremely comfortable writing AVR code, you will
fi
nd there are quite a few
de
fi
ne
directives
that you can easily modify to changes its behavior.
V1
V2
No LED pad. Solder a wire to pin 3 of the
ATtiny IC or to pin 3 of its socket
Adds an LED pad
Fits into a 1590A, but when pushed
between the screw holes at the bottom, it
doesn't sit nicely on the switch
Can be easily centered between screw holes of
the 1590A enclosure
SW1 and SW2 solder pads are o
ff
set from
the switch
SW1 and SW2 sit directly below the lugs of most
switches
Included R3 and C4 components that must
be removed (already done if you purchase
from MAS E
ff
ects)
Omitted R3 and C4
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