speeduino pcb 0.4.3c ecu motor

Description

V0.4 Board
Overview
The v0.4 board is a testing board that was developed with the goals of reproducing the existing v0.3 boards capabilities, but with the following improvements:
Lower cost (Primarily due to reduced size, but also some component changes)
More compatible with off the shelf cases/enclosures
Stepper-style IAC driver option
Has a single 40 pin connector for all IO (Excluding 12v power)
Board Features
The v0.4 boards includes the following features:
4 injector channels
4 Ignition outputs
Fully protected input channels for CLT, IAT, TPS and O2
Optional VR conditioner mount on crank and cam inputs
MAP sensor mount location
DRV8825 stepper module mount location
4 medium-current spare outputs (e.g., fuel pump, thermo fan, boost control, VVT, etc)
5 unpopulated/configured optional low-current spare outputs in "proto" section, including tachometer-out
A single 40-pin IDC connector includes all pins required for the board with the exception of the 12v input
Board revisions
Version
Changes
V0.4.3
Filter capacitors added to both primary and secondary RPM inputs. Voltage clamp added to secondary RPM input. Flex fuel input added to proto area
V0.4.2
Considerable number of routing improvements. Neater proto area layout. Voltage clamp added to primary RPM input
V0.4.1
Added Proto area. Replaced diode array with SP721. Added optional high current aux output socket (J5). Diode relocated on power circuit to prevent USB back feeding 5v onto 12v rail when ignition off
V0.4
Initial release