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=== Pin connections === [[Image:ledscreen-schematic.png|500px]] Here are the pins that need to be connected other than power and ground: * MOSI (PB3) - this sends serial data to the daughterboard * SCK (PB5) - this sends lcock signal to the daughterboard * PB1 - this should be connected to the latch/strobe signal from the old buffer board * PB0 - this should be connected to the latch/strobe signal going to the daughterboard * PD7 - this should be hooked up to the left side of one of the power sources on the buffer board through a voltage divider (and small capacitor to stabilize the signal) to bring the 15 volts down to 5 volts. Do not use the output of the power source, since it's not nearly as stable. It uses the existing STROBE (latch) signal from the buffer board for timing, and reads the state of one of the buffer board's output powers to synchronize where in the sequence of 16 power sources. It captures the latch signal and re-emits it to the daughterboard. It ignores the serial clock and serial data from the buffer board. Unfortunately this has very little processor time to spare since it's spending all its time clocking out the serial data. We're probably limited to very basic patterns on here.
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