You find schematic and layout files in http://www.vems.hu/files/genboardv3/ directory, namely:
- [v3.1 schematic] in PNG format. 259kB.
- [v3.1 schematic] in PDF format. 868kB. Note that you can use CTRL-F to find a component by name in the PDF (not possible in the png). Effectively the same as v3.2 (v3.2 has some separate 5V regulators where v3.1 has L1,L2 or trace continuity from the main 5V).
- [v3.1 board top side] in PDF format. 890kB.
- [v3.1 board bottom side] in PDF format. 817kB.
- [v3.2 schematic] in PDF format. 390kb
- [v3.2 board top side] in PDF format 580kB.
- [v3.2 board bottom side] in PDF format 580kB.
- [chip orientation, bottom] and [chip orientation, top] shouldn't be needed (as you are unlikely to solder any chips)
- [v3.x pin information] in PDF format. 356kB.
- GenBoard/VerThree/PinOut
- GenBoard/VerTwo/CircuitDiagrams has schematics for the v2.x boards. Although very advanced in its class and compared to its ancestors, v2.x is very simple, restricted and fragile (with thruhole parts layout) compared to v3.x
![[v3.1 schematic]](http://www.vems.hu/files/genboardv3/vems_v31_r222_schematic.png){kind=link}
Q - Will there be v3.3 schematics and layouts here soon?
Advanced users - mostly just for manufacturing
There are some bin/categories.* files in CVS (see GenBoard/ManuFacturing) that help to group components and even change some values (mostly just used for capacitors, where it doesn't matter much) to say the final word.
Eg. they can create list-*.txt files from the [PNP-input-file] (is this v3.1 or v3.2 version?).
FET orientation
All the TO220 switches on GenBoard/VerThree have the same orientation (at least electrically, because some people mount them below the PCB and some mount them above).
- S (source) is the GND5 for all switches
- D is the switched point that goes to EconoSealIII connector (this point jumps to several 100 Volts when ignition transformer is driven by IGBT, so it can kill you ! Similar thing happens if you forget about injector FlyBack, but that usually kills the FETs before you)
- G is the gate, which controls the device. There is always a resistor before it (usually 22 ohm installed for PWMing setup, and 1000 Ohm for nonPWM-ed FETs and all IGBTs) and some controlling device (like AVR, FETdriver or ign259 chip). The diodes parallel with the IGBT gate resistors are not necessary.
But you see this on the schematic anyway.
See also