For the most part, the machine uses Picaxe 18M2 micros. I have found that it is easier to use a small stand alone board which has been found to work correctly, rather than try to integrate the micro into each new PCB design. The connections are by way of small header plugs. A 2 way for the 12v supply, a 3 way for the programming, a 10 way and a 12 way for the various inputs and outputs. Listed in the Jaycar catalouge, the10 way is HM3410 & HM3420. The machine has a 10amp 12v isolated auxillary supply for the micros and relays, so each board has a 5v regulator. A green LED is fitted to enable quick fault finding around the machine. The main power supply has red LEDs to indicate 36v and orange LEDs to indicate 18v.