trigger preparations for v3.1

While v2.2 was running the engine (fuel only), we took a PC scope and a v3.1 (with Alubos and lotsof wires) to check the signals from the distributor. The signals were as we thought:

[a scope snapshot]


On the picture, green duty is about (12msec / 32 msec)

When RPM was about 1500,

We attached the v3.1 LM1815 input (through a 10uF 35V 1210 cap, that was on its place on the bottom side of board) to the 4-tooth signal, and read the correct RPM value (after enabling the primary_trigger).